Author Archives: chemiran

Detergent Chemicals

Detergent Chemicals

Tejaras Co. is a major manufacturer, exporter, and supplier of detergent chemicals located in the Middle East. State-of-the-art manufacturing facilities of detergent chemicals and raw materials in top governmental plants, has made us able to supply highest quality detergent chemicals and raw materials at most competitive prices.

Caustic Soda

Caustic soda in 2 types are used in detergent industry; caustic soda liquid 48-50% and caustic soda flakes 98-99%. Caustic soda ( sodium hydroxide ) is one of the most important raw materials in manufacture of detergent chemicals. It is used in saponification, the process that converts vegetable oils into soap. Caustic soda is also used to produce anionic surfactants which are largely used in detergent chemicals and cleaning products.

Linear Alkyl Benzene Sulfonic Acid ( LABSA 96-97% )

LABSA, sulfonic acid also known as acid slurry is one of other major detergent chemicals we export. LABSA is the most common anionic surfactant for synthetic detergent powder. There are some important factors that detergent manufacturers prefer sulfonic acid to other anionic surfactants. We can point out good solubility in water, high detergency and foaming, and economical prices among those important factors.

Soda ash light ( sodium carbonate )

soda ash also known as washing soda is also among major detergent chemicals. Soda ash is used as the builder ( washing auxiliary ) in detergent industry. Its main application is to be used as a solvent which can remove a wide range of stains. Also, soda ash can be dissolved in water in order to create a pre-soaking solution for tough stains like coffee, tea, blood, grease, and oil.

Sodium Lauryl Ether Sulfate ( SLES 70% )

SLES, sodium lauryl ether sulfate, also known as Texapon is one of other major detergent chemicals we supply and export. SLES is widely used in liquid detergent such as shampoo, hand washing liquid, dishwashing detergent, and bubble bath liquid.

Sodium hypochlorite

Sodium hypochlorite is the most powerful home bleach. Using sodium hypochlorite aids detergent products in the removal of stains and soil. Once sodium hypochlorite is used in the wash, it acts as a disinfectant on bacteria and viruses and generally whitens most natural-fiber fabrics like cotton.

caustic soda exporter | Caustic soda lye exporter - Tejaras Co.

Caustic Soda Exporter

Caustic soda exporter

Tejaras Co., as the leading exporter of caustic soda flakes and caustic soda liquid (lye) manufactured by top Iran governmental plants and petrochemical complexes, has had the honor to export caustic soda to 3 continents mentioning the major countries as Romania, Turkey, Vietnam, India, Kenya, South Africa, Armenia, Syria, Kazakhstan, Indonesia, and Iraq.

Caustic soda flakes 98-99% ( sodium hydroxide ), is packed by highest quality 25 KG poly propylene bags with inner poly ethylene layer. The 25 KG bags can be palletized, or get packaged in big jumbo bags. Therefore, we can easily ship all the caustic soda cargoes with standard packing to any destination in the world.

Caustic soda liquid 48-50% ( caustic soda lye ) ( sodium hydroxide ), can be packed in HDPE drums or IBC tanks.

Iran used to be among importers of caustic soda flakes up to few years ago, but after launch of big local governmental plants, the local customers could experience the high quality of local caustic soda manufacturers, and they started buying the local product than the imported counterpart. This scenario expanded in the neighbor countries as well. The customers in some countries like Iraq and Kazakhstan could feel the better quality of Iranian caustic soda ( sodium hydroxide ) compared to Chinese caustic soda as well as much more competitive prices. Therefore, they decided to import caustic soda flakes from Iran.

High quality, on-time delivery, and competitive prices comparing to all major caustic soda manufacturers around the world have made us able to get our share in global export market of caustic soda.

As Tejaras has partner companies in Dubai Turkey and Hong Kong, we can totally support all our customers around the world. Payments are possible to be received in USD/EUR/AED/RMB by our offshore partner companies outside Iran. We are also in position to ship caustic soda flakes and caustic soda liquid cargoes to any destination in the world by vessel, truck and train.

Tejaras is well prepared to accept all caustic soda inquiries around the world, and invite all the importers and end-users of caustic soda to supply the highest quality caustic soda flakes and caustic soda lye manufactured in Iran with unique export services and economical competitive prices.

In order to get the latest prices of caustic soda flakes 98-99% and caustic soda lye 48-50%, you are kindly requested to send your detailed inquiry to sales(at), and get the response in a short time from us.

Related Product:

Caustic Soda Flakes 98-99%

Caustic Soda Price

Caustic Soda Price

Tejaras Co. supplies caustic soda lye (liquid) and caustic soda flakes directly from biggest top governmental plants of Iran. This is the major difference between Tejaras and other private manufacturers in Iran. Almost all private manufacturers in Iran are small and medium-size production workshops that buy caustic soda liquid from governmental plants. Then, they move the cargo to their workshop by tankers, and then produce caustic soda flakes. Therefore, direct export of caustic soda flakes and caustic soda lye from top governmental plants has made Tejaras able to supply the highest quality caustic soda manufactured in Iran with the most competitive prices for its valued buyers around the world. Economical price is the result of direct supply from governmental manufacturers without any third-party broker or trader involved.

High quality of the product, on-time delivery, and economical prices are among the major reasons Tejaras is exporting caustic soda flakes and caustic soda lye on regular basis.

Tejaras is always well ready, and welcomes all the inquiries around the world from 1 container up to thousands of tons, to supply the highest quality caustic soda flakes and caustic soda lye manufactured in Iran with most competitive prices, and ship the cargo to any destination in the world in the fastest time through the most modern and professional international transportation companies.

If you look for the caustic soda flakes price in Iran, caustic soda lye price in Iran, ask us the price so that we can share the most competitive prices of caustic soda in Asia with you. Tejaras, as one of the leading exporters of caustic soda flakes in Iran with capacity of 100 – 150 TPD can be your reliable partner for all your caustic soda requirements.

In order to get the latest fresh caustic soda price, please send your inquiry through our email address sales(at)

Related products:

Caustic Soda Flakes 98-99%


what is paraffin?

What is paraffin?

What is paraffin?

Paraffin is an odorless colorless and tasteless hydrocarbon compound which is produced from petroleum derivatives. Some people think the only paraffin use is making candles, but there are many paraffin uses. Paraffin can be categorized in two types; paraffin wax ( solid paraffin ) and liquid paraffin ( white oil ). Paraffin wax ( solid paraffin ) is mainly used for candle and match making industries, while liquid paraffin ( white oil ) is mainly used in industrial, hygienic and pharmaceutical industries. In another aspect, paraffin uses are categorized in 3 types; food grade paraffin, industrial grade paraffin and pharmaceutical grade paraffin. Food grade paraffin is mainly used in husbandries in order to control the digestion of the livestock. It is also used for some humanitarian food products.

Paraffin wax ( solid paraffin ) and liquid paraffin ( white oil )are irreplaceable important raw materials in various industries such as textile, rubber, isolation, cosmetics, candles, matches, adhesives, and lubricants.

How to find out the quality of paraffin?

First of all, you should know the purpose of using paraffin, because the quality of paraffin is figured out as per the application of paraffin in the specific industry. For example, paraffin wax with lower oil content is considered to be high quality in candle making industries, but it is vice versa in lubrication industry.

Generally, the whiter the paraffin wax is, the higher quality the paraffin wax has comparing to milky or yellow pale-colored paraffin waxes. Also, availability of white crystal seeds in the inner layers of the paraffin shows the high quality of the product.

Tejaras Co. is well ready to supply all high quality paraffin products in different grades manufactured in Iran to all the valued customers around the world.

In order to get the latest fresh paraffin wax price, white oil price, liquid paraffin price and solid paraffin price, please send your detailed inquiry to sales (at), and get the response in a short time.

Caustic Soda Flakes Uses

caustic soda flakes uses

Caustic soda flakes uses

Commercial name: caustic soda

Caustic soda flakes CAS number: 1310-73-2

Caustic soda flakes chemical formula: NaOH /or HNaO

Caustic soda flakes UN number: 1823

Caustic soda flakes synonyms: sodium hydroxide, sodium hydrate, white caustic, natrium hydroxyde, soda kaustische, natriumhydroxid, aetznatron, ascarite


Caustic soda flakes ( sodium hydroxide ), with purity of 98-99%, with the appearance of white flakes, with the HS code: 28151100, are the major raw material in many various industries.

  1. Detergent: one of the main caustic soda flakes uses is in detergent industry. They use sodium hydroxide in soap making process. One of the other Caustic soda uses is in the production of anionic surfactants.


  1. Pulp and paper: one of another caustic soda flakes uses is in the pulp and paper industry. They use caustic soda as bleaching agent, de-inking agent, and water treatment agent in processes of pulp and paper production.


  1. Alumina refining: One of the other sodium hydroxide usages is in the production of aluminum oxide. Caustic soda is used for bauxite ore flotation.


  1. Textile: Textile factories use caustic soda in dyeing process of synthetic fibers such nylon and polyester.


  1. Chemicals: one of other caustic soda flakes uses is as the raw material for production of many chemical products such as: solvents, plastics, pesticides, paints and inks, and pharmaceutical products.


Among another major caustic soda flakes uses, we can point out: production of sodium sulfide flakes. One of other caustic soda uses is in petroleum and drilling industry. Water treatment, ceramic making, alcohol making, leather making, cotton making, and oil drilling are other major caustic soda flakes uses. Sodium hydroxide is also used for neutralizing the acids in battery production.  Another caustic soda use is for olive sweetening. Mining companies, starch producers, and chemical manufacturers are also main caustic soda flakes users.

Tejaras Co. as one of the leading exporters of caustic soda flakes 98-99% and caustic soda lye 48-50% is eagerly ready to fulfill all caustic soda requirements of importers and end-users around the world.

In order to get the latest prices of caustic soda flakes and caustic soda liquid, please send your detailed inquiry to sales(at)

mono ethylene glycol exporter

Article about Mono Ethylene Glycol Global Market Structure Changes

export of mono ethylene glycol

Mono ethylene glycol ( MEG ) is a colorless, odorless liquid manufactured from reaction of ethylene oxide and water. The main use of mono ethylene glycol is in PET manufacturing industry for fiber and bottle grades. Some small part is also used for antifreeze manufacturing.

The global production capacity of mono ethylene glycol was about 33 million tons in 2017. The total production of mono ethylene glycol will increase to about 40 million tons up to 2020 as per the anticipations. The current production volume of mono ethylene glycol in Iran is 1.4 million tons, and it will increase to 3.4 million tons as per Iran government plans. The current mono ethylene glycol manufacturers in Iran include Shazand Arak, Farsa Chemie, Maroun, and Morvarid.

As per the local reports, MEG consumption in Iran is about 230,000 MT per annum. The reports show that this volume will increase to about 450,000 MT per annum within 3 years if the government completes the plant projects that consume MEG. Therefore, with a simple calculation we can understand that about 2.5 million tons of mono ethylene glycol can be exported from Iran within the next 3 years. So, it is so important to investigate the global potential markets of mono ethylene glycol. In 2016, Iran exported 400,000 tons of mono ethylene glycol to China. This was only 7% of the import capacity of China. In the same year, all Middle East countries exported 4.8 million of mono ethylene glycol including Iran with 9% share.

Import flow of MEG in China will continue for the future years. It is expected that the import volume of mono ethylene glycol in China will be around 10 million tons by 2026. Although, they have their own MEG manufacturing plants, but as they are developing new sites for PET and fiber, they will be still a big importer of mono ethylene glycol.

Therefore, there is big potential for export of mono ethylene glycol from Iran to China with the target of around 1.5 million tons per annum in case the manufacturers provide the structure and match themselves with the market. It is necessary to consider the competitors as well. The regional competitors of Iran for export of mono ethylene glycol are Saudis and Kuwait. The investigations show that they will in total export 7 million tons of MEG within 3 years. The trans-regional competitors also include USA that is exporting 900,000 tons of MEG per annum. But these figures will change to 3 million tons per annum by 2026.

Tejaras Co. believes that although Iran manufactures 3.5% of total mono ethylene glycol of the world at the present time, and Saudis are producing 6 million tons of MEG, about 24% share of the global production, but in the coming years, Iran can increase the production capacity up to 3.4 million tons if the government completes the due projects. It is necessary to attention to this point that the market structure will change drastically in the short term future. There will be big competition among mono ethylene glycol manufacturers. Therefore, market investigation and market research should be among top priorities of the Iranian manufacturers in the petrochemical industry.

Related product:

Mono Ethylene Glycol


© 2018 Tejaras Co. All Rights Reserved


Mining Chemicals – Chemicals Used in Mining

Mining Chemicals – Chemicals Used in Mining

In this post you will study some of the most widely traded and used mining chemicals.

Mine Explosives and Drilling Chemicals:
    • Acetic Acid: Additive in industrial explosives
    • Sodium Nitrate: Initiator in industrial explosives
    • Sodium Nitrite: Initiator in industrial explosives
    • Sodium Perchlorate: Initiator in industrial explosives
    • AN Prills : base in industrial explosives
Flotation in Mining – Collectors and Modifiers:

There are many possible ways of categorizing sulfide collectors; e.g. copper collectors, lead collectors, soluble collectors, oily collectors, thiol collectors, etc. The terms “collector” and “promoter” are often used synonymously. Other reagents, which assist the adsorption of a collector on the mineral surface, are referred to as “activators”, and their use is also discussed below.


Most widely used Xanthate in the flotation process in mining:

  • Potassium Amyl Xanthate (PAX): Strong, unselective collector
  • Sodium Ethyl Xanthate (SEX): Weak, highly selective collector
  • Sodium Isobutyl Xanthate (SIBX): Good general purpose collector
  • Sodium Isopropyl Xanthate (SIPX): Selective collector with higher recovery than SEX
Modifying Agents:

a huge number of reagents usually referred to as “Modifying agents” are used in the flotation of sulfide ores. This is especially true in the case of complex ores, where two or more valuable minerals have to be separated from each other, e.g. Pb/Zn ores, Cu/Zn ores Cu/Pb/Zn ores, Cu/Mo ores, Cu/Ni ores etc.

These modifying agents cover a variety of functions; for example, pH modifiers, depressants, activators and dispersants.

pH Modifiers:

Most minerals exhibit an optimum pH range for a given collector. While some minerals can often be floated at the natural pH of the ores, in most cases the pH has to be adjusted for maximum recovery and selectivity. The most widely used reagents for alkaline circuits are lime and soda ash.

For acid circuit flotation, the most commonly used reagent is sulfuric acid. These three modifiers are generally the most cost-effective ones. Other pH modifiers are also used rarely when difficult separations are required.

Common pH Modifiers:
  • Sodium Cyanide /NaCN: Strong sulphide depressant for iron and zinc sulphides (e.g. pyrite, pyrrhotite, marcasite, arsenopyrite, sphalerite).
  • Caustic soda/ Sodium Hydroxide /NaOH : Used to raise pH
  • Soda ash /Sodium Carbonate / Na2CO3 : Used to raise pH
  • Sulphuric Acid / H2SO4 : Used when flotation needs to be at a lower pH.
Inorganic Depressants:

The principal ones used and their typical applications are as follows:

  • Sodium Cyanide: Depression of iron sulfide minerals such as pyrite, pyrrhotite and arsenopyrite. Depression of Zn minerals during Pb flotation from Pb/Zn ores.
  • Sodium Ferro cyanide: Depression of Cu and Fe sulfide in Cu/Mo separation.
  • Zinc Sulfate: Used alone, or in combination with cyanide, for depression of Zn minerals in the flotation of Pb/Zn, Cu/Zn, and Cu/Pb/Zn ores.
  • Sodium Metabisulphite/SMBS: Depression of Zn sulphide (sphalerite) and Fe sulphide (e.g. pyrite, pyrrhotite) minerals.
  • Hydrate Lime: Depressant for pyrite during copper and zinc flotation and in other sulphide ores where pyrite is a problem.
  • Citric Acid: Organic Acid gangue depressant for ores containing oxide minerals
    Sodium sulfide & Hydrosulfide (NaHS): Used for the depression of Cu and Fe sulfide minerals in Cu/Mo separation.
  • Nokes Reagent: Used for the depression of Cu and Fe sulfide minerals in Cu/Mo separation.
  • DETA (Diethylene triamine): Used for the depression of pyrrhotite in Cu/Ni ores.
  • Permanganates & other oxidizing agents: Can be useful in the separation of pyrite from arsenopyrite
  • Yellow Dextrin, Starches: Used in the depression of weathered silicates and carbonaceous matter.
  • Carboxymethyl cellulose /CMC: Used in the depression of magnesium silicates such as talc and pyroxene. Especially useful in the flotation of PGM and Ni ores.
  • Guar gum: Depression of silicate gangue (e.g. talc, serpentine, lizardite, antigorite).




Certain minerals do not float well with the use of only a collector, but require prior activation. The most commonly used activators are:

  • Copper Sulphate /CuSO4: Activation of Zn sulfide and Fe sulfide minerals such as pyrite and pyrrhotite when the latter contain values such as Au, Ni and PGM elements.
  • Lead (Pb) Nitrate or 
Pb Acetate: Used for the activation of antimony sulfide minerals such as stibnite and to reactivate copper sulphides depressed with cyanide.
  • Sodium Sulphide (Na2S) /Sodium Hydrosulphide (NaHS): Commonly used prior to collector addition for the activation of Cu, Pb, and Zn minerals. The choice of whether to use Na2S or NaHS depends on the pH required in flotation, as Na2S is more alkaline and also, whichever works best (test to verify). Typically made up to 15-25 % solution strength.
  • NaCN/ Sodium Cyanide: Acts as a surface cleaning agent or “activator” to improve the flotation of PbS.

Many ores contain significant quantities of clay minerals and other “primary slimes”. These can have an adverse effect on flotation metallurgy. This can be due to a combination of factors such as, (a) increasing pulp viscosity, which adversely affects air bubble distribution, and froth drainage/mobility; (b) slimes can form a coating on the surface of valuable minerals thereby inhibiting their flotation.
The usual practice for minimizing the aforementioned effect of “slimes” is to conduct the flotation at lower percent solids to reduce the pulp viscosity. However, this also reduces the effective residence time in the flotation circuit. Consequently the use of both inorganic and organic dispersing and viscosity reducing agents is commonly practiced. Sodium silicate, soda ash, various poly- phosphate.

Related Produtcs:

Sodium Sulfide Yellow Flakes 60% (Na2S)

Caustic soda flakes 99% (NaOH) (Sodium Hydroxide)

Soda Ash Light

Soda Ash Dense

Hydrogen Peroxide

Calcium Hypochlorite

Paraffin wax Uses – Paraffin wax applications

Paraffin wax Uses – Paraffin wax applications

Paraffin wax Uses – Paraffin wax applications

Paraffin wax Uses – Paraffin wax applications

Paraffin wax Uses – Paraffin wax applications

Paraffin wax CAS Number:  8002-74-2

Paraffin wax chemical formula: C21H27NO3



Paraffin wax use in coatings: It is added to many candy coatings and chocolates to give the treats a shiny finish. It is also used to coat fruits and vegetables to extend shelf life by retaining moisture.


Paraffin wax use in candles: Paraffin wax is popularly used in candle making process. Paraffin candles are odorless and bluish-white in color, burns more cleanly and are also more economical than other types of candles.

Almost all types of candle can be made with paraffin wax. The melting point is the primary determinant of the type of candle you can make with it.

Low melt point paraffin (less than 130F) is used for container candles in jars, cups or glasses

Medium melt point paraffin (130F-150F) is used for candles that need to stand on their own – votives, pillars, and other molded candles

High melt point wax (greater than 150F) is used for more special applications like hurricane candle shells, over-dipping, and other special candle making applications.


Paraffin wax use in cosmetics: Cosmetically, paraffin wax is often applied to the hands and feet. The wax is a natural emollient, helping make skin supple and soft. When applied to the skin, it adds moisture and continues to boost the moisture levels of the skin after the treatment is complete.

It can also help open pores and remove dead skin cells. That may help make the skin look fresher and feel smoother.

Therapeutic benefits

Paraffin wax may be used to help relieve pain in the hands of people with:


Rheumatoid arthritis


Other joint mobility issues

It acts like a form of heat therapy and can help increase blood flow, relax muscles, and decrease joint stiffness. Paraffin wax can also minimize muscle spasms and inflammation as well as treat sprains.


Paraffin wax uses in crayons: It is the primary ingredient in crayons that gives them their waxy texture. The wax, mixed with color pigments, is poured into a mold to form the crayon.


Paraffin wax use in matches: Paraffin is naturally water resistant. Paraffin wax coatings can be applied to a variety of products to make them waterproof, including matches, wood and bottles. To make your own waterproof matches, dip the match head in melted paraffin wax, remove it from the wax and blow on it to cool and harden the wax quickly.


Paraffin wax use in rubber: In order to prevent rubber from being cracked with air or sun light, it is formerly known that a wax-based antioxidant is used in rubber.

When the wax-based antioxidant is blended with rubber, the antioxidant oozes out onto the surface of rubber and forms a thin film thereon. This thin film prevents the rubber from contacting ozone, and thus prevents degradation thereof.


Paraffin wax uses as friction reducer: Since paraffin wax has lubricating properties, it is applied to a variety of products to reduce friction. Snowboarders, skateboarders and surfers apply paraffin wax to the bottom of their boards to help them glide easier.


Paraffin wax uses as moisturizer : A number of toiletries and cosmetic products contain paraffin wax as a moisturizing agent. As paraffin wax is potentially comedogenic and may lead to acne or pimples, such moisturizers are usually recommended for those with very dry skin.


Paraffin wax use in paint: Among the plethora of additives available today, waxes have a significant impact on many formulations or processes. Even if used in relatively small quantities – typically below 3% solids content of the total composition – waxes impart or improve effects as various as slip and lubrication, abrasion resistance, anti-blocking, matting and water repellency – all critical properties in the coating and ink areas. Hence, waxes are often classified as surface conditioner additives.

  1. Wax is added to paper products to make them more durable and moisture resistant. A thin coating of wax keeps the paper product from disintegrating when it comes in contact with moisture, like grease or water.

Wax is also added to paper products to keep things from sticking to it. Chewy candies are often wrapped in wax coated paper to make them easy to unwrap.

  1. There are three different ways wax is applied to paper products.

Wet waxing (aka wax bath): A sheet of paper is immersed in the wax

Roll-on or dry waxing: Wax is rolled on the sheet of paper using rollers

Laminating: Wax is applied to printed paper and is used to bond two substrates together, such as foil to paper or paper to paper.

  1. The amount of wax added to the paper depends on what the coated paper will be used for. For example, butcher paper has a thicker wax coating on it than candy wrapper paper. For a ream of paper, which is approximately 3,000 square feet, there can be up to 30 pounds of wax on it.


Related products:

Paraffin Wax


© 2018 Reza Heydari All Rights Reserved.

sodium sulfide manufacturer

Sodium sulfide manufacturing methods and applications

Sodium sulfide production methods:

Sodium sulfide (Na2S) is a yellow to red solid material soluble in water, slightly soluble in alcohol. It is a strong reducing agent and reacts with oxidant.

No commercial process for the production of sodium sulfide containing neither water nor iron is known. The commercially available sodium sulfide is in every case produced by reduction of sodium sulfate, usually by means of carbon, but also by means of hydrogen and other reducing gases. Reduction with carbon yields a crude melt, which contains, in addition to sodium sulfide, considerable amounts of impurities and by-products such as unreacted carbon, ash constituents, impurities from the carbon, carbonates, sulphites, sodium thiosulfates, and iron compounds. This crude melt is usually extracted with water so that the water-soluble part of the impurities and considerable amounts of iron pass into the extraction liquor. Other reactions take place subsequently in the aqueous solution, and these lead to undesirable by-products. by evaporating the extraction liquor, either crystals of the composition Na S.9H O are obtained or with further evaporation, a product containing 60% of Na S solidifies from the melt. Both hydrates, namely the hydrate crystallising from the solution and containing 32% of Na S, contain considerable amounts of soda, sulfite, thiosulfate, sulfate, and iron salts. The commercially available substance containing 60% Na is colored a dark reddish brown by the iron and can scarcely be used for certain purposes such treatment of textiles. It is not technically or economically possible to reduce the residual 40% of water content by further evaporation on account of the extraordinarily steep rise in the melt temperature above 60% of Na-S and since a suitable material for use in making the necessary apparatus which is resistant to concentrated sodium sulphite melt is unknown. Even evaporation to only 60% of Na S necessitates the use of apparafus made from expensive special alloys or causes heavy wear on other materials.

A process has now been discovered for obtaining a sodium sulphide of excellent purity by reduction of sodium sulphate with carbon or other reducing agents, which sulphide is in particular free from iron and water. The process is based on the fact that anhydrous sodium sulphide, unlike the hydrate, dissolves readily in alcohols.

Claim1: In a process for the production of pure anhydrous sodium sulfide free from iron, the step which comprises heating the melt obtained by reduction of sodium sulfate with carbon and which contains impurities resulting from the reduction process, with an alcohol, filtering the sodium sulfide solution thereby formed and recovering the sodium sulfide from the said solution by evaporating the alcohol.


It is known that sodium hydroxide may be reacted with H2S to form Na2S which may be treated with more H2S to convert Na2S to NaHS, and it has been proposed to make sodium hydrosulfide by gassing an Na2S-NaHS liquor with pure hydrogen sulfide.

In processes of the type to which the invention relates, the source of sodium is commercial caustic soda which contains appreciable quantities of impurities, such as iron, copper, nickel, manganese and silicon. These impurities do not discolor caustic soda to any great extent, and hence their presence in commercial caustic is unobjectionable. However, during H2S gassing of commercial caustic liquor, such impurities pass thru the process and are carried into the resulting NaHS liquor. Such impurities may be present in the NaHS liquor as soluble salts or suspended in finely divided condition. While probably largely sulfides, exact compositions of the impurities are not known, and whatever their nature, these subtances are referred to herein as metallic impurities. The presence of even small amounts of these impurities in Na2S or NaHS solutions results in products of very poor appearance because of the highly colored nature of the impurities after having been subjected to H2S gassing. Accordingly, a major problem presented in manufacture of relatively pure sodium hydrosulfide has been the elimination of such impurities.

Commercially available hydrogen sulfide gases contain appreciable amounts of carbon dioxide as an impurity.

Claim2: the method for producing purified sodium sulfide from a sodium hydrosulfide liquor containing (a) at least one metallic impurity of the group consisting of iron, copper, nickel, manganese, and silicon, and (b) an amount of available carbonate of sodium equivalent to more than 0.06% by weight of CO3 radical, which method comprises treating said liquor with an alkaline earth compound so as to react with available carbonate of sodium to precipitate combined CO3 thereof as alkaline earth carbonate, the amount of said alkaline earth compound being at least sufficient to reduce the available carbonate of sodium content of said liquor to an amount equivalent to not more than 0.06% by weight of CO3 radical, controlling the composition of the resulting liquor so that such liquor contains not more than 5% by weight of sodium sulfide, thereby effecting coagulation and precipitation of metallic impurities, and separating said metallic impurities from such liquor.


Claim3: The method for producing purified sodium sulfide from a sodium hydrosulfide liquor containing (a) metallic impurities of the type present in commercial sodium hydroxide, and (b) an amount of available carbonate of sodium equivalent to more than 0.06% by weight of COA radical, which method comprises treating said liquor with an alkaline earth compound so as to react with available carbonate of sodium to precipitate combined Cos thereof as alkaline earth carbonate, the amount of said alkaline earth compound being at least sufficient to reduce the available carbonate of sodium content of said liquor to an amount equivalent to not more than 0.06% by weight of Cos radical, controlling the composition of the resulting liquor so that such liquor contains not more than 5% by weight of sodium sulfide, thereby, effecting coagulation and precipitation of metallic impurities, and separating said metallic impurities from such liquor.


Sodium sulfide applications:

Sodium sulfide is one of the main chemicals and raw materials in so many industries such as mining industry, leather industry, metallurgy industry, textile industry, dyes and intermediates, pulp and paper, soda ash manufacturing, metal refining industry.



Related products:

Sodium sulphide flakes 60%



© 2018 Tejaras Co. All Rights Reserved

How can Tejaras Co. help foreign customers to purchase and import Iran origin chemicals and petrochemical products in the new era of imposed U.S. shipping banking and economical sanctions against Iran?

How can Tejaras Co. help foreign customers to purchase and import Iran origin chemicals and petrochemical products in the new era of imposed U.S. shipping banking and economical sanctions against Iran?


With respect to be located in one of the most strategic regions in the world, having good access to major commercial ports, railway stations and land roads in the world, high quality of the manufactured chemical raw materials and petrochemical products, and competitive prices which can beat so many other manufacturers in the world, there are thousands of big and medium importers around the world especially in India, East Africa, South Asia, Europe and South America which are willing to buy chemicals and petrochemical products from Iran, but they have worries that how can they purchase from Iran? and how can they receive their purchased products in a safe and smooth way?


The fact is that all the companies in the field of leather, textile, mining industries, metallurgy, agriculture, fertilizer manufacturing, chemical manufacturing, refinery, oil and gas, food production, metal refining, alumina refining, lubricant manufacturing, detergent manufacturing, cosmetics manufacturing, construction, water treatment, candle and match manufacturing, paint and dyes manufacturing can benefit from high quality Iran origin chemical raw materials with competitive prices, but how?


The first barrier for the customers is banking transactions: almost all the major banks in the world refuse to do transactions with Iranian banks due to U.S. sanctions. Besides, almost none of Iranian manufacturers have any offshore company or bank account. In the best way, they will introduce a foreign bank account from a company which is not directly linked with their own factory in Iran. Therefore, the customers worry that what happens to their money in case any dispute or mismanagement happens with the factory? How can they follow up in case the factory does not cooperate with them in an amicable manner?

How can Tejaras Co. solve banking issues for its valued customers?

With real and exact study of the political and economical situation in the region, we decided to establish strong business partnership with some companies in Dubai, Turkey and Hong Kong, and arrange all our banking transactions and documentation through our these partner companies outside Iran. Therefore, we are pleased to inform you that we can receive payments in EUR/USD/AED in the mentioned countries without any single problem.

Besides, it has been many years we are active in this market, and as we have strong business relationship with our factories, such problems have never happened for our company. But, as we also have legal local contracts with all our Iranian factories and we pay them through official account in Iranian local banks, all the payments to the factories can be followed up legally in Iran through us, and in case any problem or dispute happens with the factory, it can be followed up through Iran Judiciary organization and Chamber of Commerce by our professional legal experts. Therefore, we guarantee that your payments will be 100% safe with us.



The second barrier for the customers is delivery term: almost all Iranian chemical and petrochemical manufacturers and refineries sell their products on EXW factory basis in bulk, and it is very difficult for foreign customers to make their shipments out of Iran as it is almost impossible for them to communicate with local transportation and packaging/drumming companies in Iran.

How can Tejaras Co. solve delivery issues for its valued customers?

As per our strong business relationships, contracts and partnerships with the leading transportation companies both locally and internationally, we are pleased to inform you that we can deliver all your orders in any region in the world by vessel, train or truck through the fastest smoothest and most cost-effective routes.

We also have the ability to design and print customized packaging for our strong customers upon solo partnership contracts.



The third barrier for the customers is shipping documents: As per the new sanctions against Iran, in some countries, shipments departed from Iranian ports are not allowed to be cleared at customs. So, the customers may look for some solutions that how they can import Iran origin products to their countries.

How can Tejaras Co. solve shipping documents issues?

As per our cooperation with Iranian shipping line company, we have the ability to ship all cargoes from Iran to Jebel Ali port of U.AE., and then dispatch to the final destination port with economical rates. Needless to say that, no Iranian port name will be mentioned on the shipping documents and bill of lading, and port of loading will be Jebel Ali, U.A.E.


Tejaras Co. manufactures, supplies and exports so many strategic chemical products such as caustic soda flakes, sodium sulphide flakes, white oil, low aromatic white spirit, paraffin wax, sulfur, LABSA, glycols, amines, calcium hypochlorite, hydrogen peroxide, methanol, and gasoil.

We are honored to inform you that can be your loyal partner in Iran in order to fulfill all your chemicals and raw materials requirements, so that a dream of smooth business with Iran can come true for your esteemed company.


For further information, you can mail us at [email protected]



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