Ammonium polysulfide removal of HCN from gaseous streams, with s

Details Ammonium polysulfide removal of HCN from gaseous streams, with s Ammonium polysulfide removal of HCN from gaseous streams, with s

1983-11-29

1985-03-19

Heller, Gregory A.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Nitrogen or nitrogenous component

423237, 423355, 423366, 423437, 423567R, 423567A, 423571, 423563, C01C 300, C01B 1716, C01B 1702

Patent

active

045058814

ABSTRACT:
A process for the removal of HCN from gaseous streams is described, the process being characterized by reaction of the HCN in the gaseous stream with an ammonium polysulfide solution, formation of ammonium thiocyanate in solution, decomposition of ammonium polysulfide and precipitation of sulfur from the ammonium thiocyanate solution in a stripping zone, and hydrolysis of the ammonium thiocyanate. Recycle or recovery of sulfur and hydrolysis products are contemplated.

REFERENCES:
patent: 1656563 (1928-01-01), Koppe
patent: 1816084 (1931-07-01), Koppe
patent: 1853679 (1932-04-01), Hansen
patent: 1924206 (1933-08-01), Hansen
patent: 1932819 (1933-10-01), Hansen
patent: 4098886 (1978-07-01), Nicklin et al.

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