Sodium hydrosulfide is used in the dye industry as an auxiliary for synthesizing organic intermediates and preparing sulfur dyes. The tanning industry is used for dehairing and tanning of hides and for waste water treatment. The fertilizer industry is used to remove the monomer sulfur in the activated carbon desulfurizer. It is the raw material for the manufacture of semi-finished products of ammonium sulfide and pesticide ethanethiol. The mining industry is heavily used for copper beneficiation. It is used for sulfite dyeing in the production of man-made fibers.
In the global market, sodium hydrosulfide is mainly used in industries such as mineral processing, pesticides, dyes, leather production and organic synthesis. In 2020, the global sodium hydrosulfide market size is 10.615 billion yuan, a year-on-year increase of 2.73%. At present, the annual output of sodium hydrosulfide in the United States is 790,000 tons. The consumption structure of sodium hydrosulfide in the United States is as follows: the demand for sodium hydrosulfide for kraft pulp accounts for about 40% of the total demand, copper flotation accounts for about 31%, chemicals and fuels account for about 13%, and leather processing accounts for about 31%. 10%, others (including man-made fibers and segphenol for desulfurization) account for about 6%. In 2016, the market size of the European sodium hydrosulfide industry was 620 million yuan, and in 2020 it was 745 million yuan, a year-on-year increase of 3.94%. In 2016, the market size of Japan’s sodium hydrosulfide industry was 781 million yuan, and in 2020 it was 845 million yuan, a year-on-year increase of 2.55%.
Although my country’s sodium hydrosulfide industry started late, it has developed rapidly and has become an important pillar industry sector of my country’s national economy. Sodium hydrosulfide industry occupies a pivotal position in the national economy. Sodium hydrosulfide industry can drive the development of agriculture, textile industry, leather industry and other related industries; drive scientific and technological progress and national economic growth; provide and expand employment opportunities.
According to GB 23937-2009 industrial sodium hydrosulfide standard, industrial sodium hydrosulfide should meet the following standards:
From the end of the 1960s to the mid-1990s, China’s sodium hydrosulfide industry has greatly improved and innovated in terms of production equipment, technology and product specifications. In the late 1990s, the production of sodium hydrosulfide has developed to a higher level of technology. Anhydrous sodium hydrosulfide and crystalline sodium hydrosulfide have been successfully developed and entered into mass production. Before, in the production process of sodium hydrosulfide in my country, it was found that the low rate of special grade and the excessive iron content were the main problems in production. Through continuous improvement of the production process, product quality and output have increased, and costs have also dropped significantly. At the same time, with my country’s emphasis on environmental protection, the waste water produced by the production of sodium hydrosulfide has also been effectively treated.
At present, my country has become the world’s major producer and consumer of sodium hydrosulfide. As the use of sodium hydrosulfide is continuously developed, its future demand will gradually expand. Sodium hydrosulfide is used in the dye industry to synthesize organic intermediates and as an auxiliary agent for the preparation of sulfur dyes. The mining industry is widely used in copper ore beneficiation, in the production of man-made fibers for sulfite dyeing, etc. It is the raw material for the manufacture of semi-finished products of ammonium sulfide and pesticide ethyl mercaptan, and is also used for wastewater treatment. Technological changes have made the production process of sodium hydrosulfide more mature. With the development of various economic forms and the increasingly fierce competition, the technological progress of sodium hydrosulfide production reduces the input as much as possible to produce high-quality and more products.
Post time: May-12-2022