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This compound is the product of the half-neutralization of hydrogen sulfide (H 2 S) with sodium hydroxide (NaOH). NaSH and sodium sulfide are used industrially, often for similar purposes. Solid NaSH is colorless. The solid has an odor of H 2 S owing to hydrolysis by atmospheric moisture.
A number of processes have been designed to remove hydrogen sulfide from drinking water. [54] Continuous chlorination For levels up to 75 mg/L chlorine is used in the purification process as an oxidizing chemical to react with hydrogen sulfide. This reaction yields insoluble solid sulfur. Usually the chlorine used is in the form of sodium ...
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Drinking water can be obtained from natural water by treating the natural water with a mixture of activated carbon and aluminium hydroxide (Al(OH) 3), a flocculating agent. Impregnated carbons are also used for the adsorption of hydrogen sulfide (H 2 S) and thiols. Adsorption rates for H 2 S as high as 50% by weight have been reported ...
The global annual production of thiourea is around 10,000 tonnes. About 40% is produced in Germany, another 40% in China, and 20% in Japan. Thiourea is manufactured by the reaction of hydrogen sulfide with calcium cyanamide in the presence of carbon dioxide. [6] CaCN 2 + 3 H 2 S → Ca(SH) 2 + (NH 2) 2 CS 2 CaCN 2 + Ca(SH) 2 + 6 H 2 O → 2 (NH ...
Melting point: 275 °C (527 °F; 548 K) Solubility in water. Soluble in water Hazards ... it is converted to hydrogen sulfide and elemental sulfur. Treatment with ...
Sodium sulfide is a chemical compound with the formula Na 2 S, or more commonly its hydrate Na 2 S·9H 2 O.Both the anhydrous and the hydrated salts in pure crystalline form are colorless solids, although technical grades of sodium sulfide are generally yellow to brick red owing to the presence of polysulfides and commonly supplied as a crystalline mass, in flake form, or as a fused solid.
Methanethiol is prepared commercially by the reaction of methanol with hydrogen sulfide gas over an aluminium oxide catalyst: [10] CH 3 OH + H 2 S → CH 3 SH + H 2 O. Although impractical, it can be prepared by the reaction of methyl iodide with thiourea. [11]