Main purposes: for the manufacture of sulfur dyes, leather hair removal agents, metal smelting, photography, such as rayon and denitrification. Is widely used in leather, paper, mineral processing, dye production, organic intermediates, printing and dyeing, pharmaceutical, MSG, synthetic fiber, special engineering plastics, polyphenylene sulfide, poly base rubber, is also used for manufacturing sodium hydrosulfide, multi - sodium sulfide, sodium thiosulfate, etc., in the military industry also has a certain purpose.
① In the dye industry for the manufacture of sulfur dyes, curing green, blue or dye intermediate curing reducer, mordant and so on.
② In the non-ferrous metallurgical industry as ore flotation agents.
③ rawhide leather industry in the hair removal agent.
④ paper industry in the paper cooking agent.
⑤ sodium sulfide is also used sodium thiosulfate, sodium polysulfide, sodium hydrosulfide and other product manufacturing.
⑥ is also widely used in textiles, paints, rubber and other industrial sectors.
Production methods:
Coal reduction method: Sodium in the mixer with the pulverized coal mixture added to the converter, the reduction reaction carried out under high temperature, the reaction proceeds through the rough alkali leaching filtration, evaporation, or get post-production.
Dangerous Goods Code: 82011