Sodium thiocyanate powder Raw Materials CAS 540-72-7

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Uses and synthesis of Sodium thiocyanate powder

Sodium thiocyanate powder is also known as sodium thiocyanide. Its structural formula is Na-S-C≡N, which is produced by the reaction between sodium cyanide and sulfur or as a by-product of desulfurization of coke oven gas. Chemical formula NaSCN, molecular weight 81.07, white crystalline powder, Sodium thiocyanate CAS 540-72-7 is easy to deliquesce in air.

The product containing two water of crystallization is white needle crystal.Sodium thiocyanate Raw Materials Relative density 1.735.Melting point 287°C. Refractive index 1.625. Refractive index 1.625, soluble in water, ethanol, acetone and other solvents.

Applications / Functions of Sodium thiocyanate powder

• Sodium thiocyanate CAS 540-72-7 can be used as a solvent for the extraction of acrylonitrile fibers, a color film developing agent, a defoliant for some plants, and an herbicide for airport roads, Sodium thiocyanate powder is also used in the industries of pharmaceuticals, printing and dyeing, rubber treatment, nickel plating of black color film, pesticides and so on;
• Sodium thiocyanate Raw Materials is also used for mold inhibition and preservative.GB2760--2001 stipulates that it is used for freshness preservation of raw cow's milk in combination with hydrogen peroxide, and it can be used as analytical reagent, such as the determination of niobium in iron and steel, and the determination of silver, copper, iron, and the manufacture of organic thiocyanate.

Physicochemical Property of Sodium thiocyanate powder

White rhombohedral crystal or powder; soluble in water, ethanol, acetone and other solvents.

Sodium thiocyanate Raw Materials is also known as sodium thiocyanate. Its structural formula is Na-S-C≡N. It is produced by the reaction between sodium cyanide and sulfur or as a by-product of desulfurization of coke oven gas. Chemical formula NaSCN, molecular weight 81.07, white crystalline powder, easily deliquesced in air.

The product containing two water of crystallization is white needle crystal. Relative density 1.735, melting point 287°C. Refractive index 1.625. Refractive index 1.625.Sodium thiocyanate powder Soluble in water, ethanol, acetone and other solvents. Aqueous solution is neutral, when encountered with iron salts to generate blood-red ferric thiocyanide, and ferrous salts do not react.

Toxic. Sodium thiocyanate CAS 540-72-7 Used as solvent for polyacrylonitrile fiber extraction, color film developing agent, chemical analysis reagent.

Production methodprocess of Sodium thiocyanate powder

Synthesis method will be sodium cyanide and sulfur reaction to generate sodium thiocyanate, after the removal of impurities, activated carbon decolorization, filtration, filtrate and then by evaporation, filtration, crystallization, separation, the production of Sodium thiocyanate powder.

Arsenic alkali by-production method to arsenic alkali liquid desulfurization of hydrogen sulfide in the coke oven gas, the generation of sodium thiocyanate and sodium cyanide, through the regeneration tower into sodium thiosulfate and sodium cyanate. The above arsenic lye desulfurization waste liquid is treated with sulfuric acid, Ph value is controlled to 4.5, so that arsenic sulfide is precipitated, and neutralized with soda ash, at this time, the content of sodium thiocyanate in the raw material liquid is 130～160g/L, and sodium thiosulfate is 250～300g/L, which is evaporated by vacuum.

Crystallization at 15 ~ 16 ℃, separation of sodium sulfate and sodium thiosulfate, the crude product with water to dissolve, add sulfuric acid at 90 ~ 100 ℃ insulation 2h, so that the sodium thiosulfate is converted to sodium sulfate, filtration to remove, the filtrate by the addition of alkali to remove iron, barium hydroxide in addition to the residual sodium sulfate, the upper layer of filtrate purified by vacuum evaporation and centrifugal separation, that is, to obtain the purity of 98% or more, the amount of ferrous oxide (FeO) containing Sodium thiocyanate Raw Materials with a purity of more than 98% and a FeO content of less than 0.0005%.

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