Products and Services

        In addition to cellulosic fiber, Yamei also has some byproducts like sodium hydrosulfide, carbon disulfide and sodium sulfate. And after introduced world-class environmental protection facilities, Yamei can recycle 99% of the waste gas released in the production process.


Sodium hydrosulfide Brand product introduction +
Sodium hydrosulfide
Molecular formula:NaHS    
Physical and chemical properties:Colorless acicular crystal, easy deliquescence; can decompose and release hydrogen sulfide at the melting point; easy soluble in water and alcohol. Its aqueous solution is strongly alkaline and it can react with acid and release hydrogen sulfide. The industrial sodium hydrosulfide is generally orange or yellow solution and it is bitter.
Advantages: Compared with the same kind of products, the sodium hydrosulfide produced by our company has many advantages, such as high purity, less impurities and difficult to soften with heat. And it is widely used in the industrial fields like mineral processing, pesticides, dyes and leather production and organic synthesis. The high purity and less impurities of our sodium hydrosulfide can effectively reduce the customers’ production costs, which makes it highly favored by customers.  
Application: In dye industry, it is used as an auxiliary for the synthesis of organic intermediates and the preparation of sulfur dyestuff; in leather industry, it is used for raw hide depilation, tanning and waste water treatment; in fertilizer industry, it is used for the removal of the monomer sulfur from the activated carbon desulfurization agent, and it is also used as the raw material for the manufacture of the semi-finished ammonium sulfide and pesticide ethanethiol; in mining industry, it is largely used for copper processing; in the production of artificial fiber, it is used for sulfurous acid dyeing and so on.
Packing:25 kg net weight; total three layers of packaging including the inner plastic bags and the outer woven bag.
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Sodium Sulfate Brand product introduction +
Sodium Sulfate
Product name:Sodium Sulfate    
Molecular formula: Na2SO4
Physical and chemical properties:Physical and chemical properties: White monoclinic crystal or powder with a relative density of 2.68 and a melting point of 884 ℃; soluble in water and its aqueous solution is alkaline; soluble in glycerol and insoluble in ethanol. If exposed to the air, it is easy to absorb moisture and become aqueous sodium sulfate. It will turn into hexagonal crystal under a temperature of 241 ℃.
Advantages:The sodium sulfate produced by our company has the advantages of high purity and less impurities and it is highly favored by customers. Its main physical indicators are as follows: sodium sulfate ≥ 99.5%, calcium and magnesium content (in terms of magnesium) ≤ 0.03%, iron (in terms of Fe) ≤ 0.002%, water content ≤ 0.02%, water insoluble matter ≤ 0.05%, whiteness ≥ 80%, PH value is between 6-8, chloride (in terms of Cl) ≤0.003.  
Application:It is widely used in the manufacture of chemical products such as sodium sulfide, ultramarine and sodium silicate; it is used in the manufacturing of sulfate paper pulp in paper industry; it is used as a substitution of soda in glass industry; it is used as a filler in dye industry; it is used as dyeing auxiliary in printing and dyeing industry; it is used as laxatives or barium poisoning antidote in pharmaceutical industry. In addition, it is also used in the manufacturing of synthetic fiber, leather, nonferrous metallurgy, enamel and soap.
Packing: 50 kg net weight; three layers of moisture-proof packing bags.
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