Process for producing ammonium thiosulfate

Details Process for producing ammonium thiosulfate Process for producing ammonium thiosulfate

2007-08-22

2010-02-02

Mayes, Melvin C (Department: 1793)

Chemistry of inorganic compounds

Sulfur or compound thereof

Oxygen containing

C423S032000, C423S388000

Reexamination Certificate

active

07655211

ABSTRACT:
Process for the production of ammonium thiosulfate from gas streams comprising ammonia and hydrogen sulfide. One embodiment of the invention provides absorbing SO2into a solution of ammonium sulfite and then contacting gaseous feed streams with portions of the resulting solution in a plurality of contact zones where portions of ammonium sulfite in the liquid streams are converted to ammonium thiosulfate upon contact with the gaseous feed streams.

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