Category : Uncategorized
Commercial name: Sodium sulfide ( sodium sulphide )
Na2S CAS number: 1313-82-2
Chemical formula: Na2-S
UN number: 1849
Tanneries begin the leather manufacturing process by ordering hides. These can weigh over 90 pounds and lay flat at about 50 square feet. However, the hide will still be shaped like the cow, and will probably have a few imperfections. The hair on the hide will need to be chemically removed prior to tanning. The hide may go through other processes to remove impurities and soften the skin so the tanning chemicals can be fully absorbed.
Sodium Sulfide is used in the first step: chemically destroys the hair on hides or skins. Sodium sulfur also will soften stiff leather. Yellow flakes of Sodium Sulfur (Sodium sulphide) 60% is recommended and iron content suggested below 30PPM. Due to the wasted water of tanning is very harmful for our health, Sodium sulphide ( Na2S ) with low iron content is the best choice for tanning industry.
They use it in pulp and paper manufacturing companies in the process of kraft.
One of other main sodium sulfuret uses is in the process of ore flotation in mining companies. They use Na2S ( sulfur sodium ) ( sodium sulfur ) as an agent in the ore flotation process of Zinc, copper, iron, and other metal ores.
It is also a suitable reducing agent. The salt facilitates the absorption. Then, once the fabric is removed from the dye solution, it is allowed to stand in air whereupon the dye is regenerated by oxidation.
They also use Na2S in order to remove heavy metals from waste water through precipitation at normal or alkaline pH. Sulfide and ferrous ions perform together to reduce hexavalent chromium to trivalent chromium to form a precipitate.
Other major sodium sulfide applications include as de-sulfurizing, bleaching and dyeing agent in sulfur dyes. They also use Sodium sulphide as the raw material for producing mining chemicals, detergent chemicals, pharmaceutical chemicals, and agricultural chemicals.
Tejaras Co. as one of the leading manufacturers and exporters of sodium sulfide in the Middle East is ready to supply the highest quality sodium sulfide manufactured in Iran for all the importers and end-users around the world.