Process for the continuous manufacture of crystallized ammonium

Details Process for the continuous manufacture of crystallized ammonium Process for the continuous manufacture of crystallized ammonium

1973-06-18

1976-02-10

Thomas, Earl C.

Chemistry of inorganic compounds

Sulfur or compound thereof

Oxygen containing

423519, C01B 1764

Patent

active

039377938

ABSTRACT:
Crystallized ammonium thiosulfate is manufactured by converting ammonia with oxygen containing sulfur dioxide in ammonium thiosulfate solution to ammonium bisulfite and ammonium sulfite in a first step, while maintaining a pH of from 5.5 to 7.0 and a reaction temperature of up to 80.degree.C. In a second step, the ammonium bisulfite and ammonium sulfite in the solution are converted with ammonia and sulfur to ammonium thiosulfate.

REFERENCES:
patent: 2219258 (1940-10-01), Hill
patent: 3431070 (1969-03-01), Keller
patent: 3473891 (1969-10-01), Mack

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