Origin and uses of sodium hydrosulfide

The significance of acid gas purification and recovery: According to the gas data provided, hydrogen sulfide acid gas is a by-product of the petrochemical production process, which is highly toxic, malodorous, and one of the important sources of pollution in the petrochemical industry. For the treatment of sour gas, the traditional method is the Krause method for sulfur recovery, but the investment is large, the output is low, and the operating cost is high. Aiming at the owner to provide the characteristics of acidic gas, dry gas with high H₂S content, atmospheric dry gas, steam extraction tower top gas, NaOH chemical absorption method is used to design the acidic gas desulfurization treatment process for the production of sodium hydrosulfide, the basic raw material of chemical industry. The process is simple, with high H₂S removal rate, small investment and high recovery benefit.

The product of sodium hydrosulfide is mainly used in mineral processing, pesticides, dyes, leather production and organic synthesis and other industries. Sodium hydrosulfide is used in the dyestuff industry for synthesis of organic intermediates and preparation of sulfide dyes as an auxiliary, the tanning industry is used in the dehairing and tanning of raw hides and skins, and is used in the tanning industry for routine soaking, which can evenly loosen the fiber tissue of hides and skins, make the hides expand slowly, with obvious anti-wrinkle and improve the rate of leather, and ensure the color of the blue skin of hides and skins, to ensure the sense and quality of hides and skins. Sodium hydrosulfide in the fertilizer industry can be used to remove the monomer sulfur in activated carbon desulfurizer, pesticide industry is the manufacture of ammonium sulfide and pesticide ethanethiol semi-finished raw materials. In the mining industry, sodium hydrosulfide is used in large quantities in copper ore beneficiation, and in the production of man-made fibers for sulfite dyeing, etc. In addition, sodium hydrosulfide can be used in wastewater treatment, sodium hydrosulfide treatment mainly plays a role in the sulfur, metal sulfide (generally black) is more insoluble than the metal hydroxide precipitates. So adding sodium hydrosulfide to wastewater is mainly to deal with heavy metal compounds in the water.