Solution removal of HCN from gaseous streams, with pH adjustment

Details Solution removal of HCN from gaseous streams, with pH adjustment Solution removal of HCN from gaseous streams, with pH adjustment

1983-11-29

1985-04-02

Heller, Gregory A.

Chemistry of inorganic compounds

Modifying or removing component of normally gaseous mixture

Nitrogen or nitrogenous component

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

Patent

active

045086931

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 and formation of ammonium thiocyanate in solution, precipitation and removal of sulfur from the ammonium thiocyanate-containing solution, and hydrolysis of the ammonium thiocyanate. Provision is made for recycle of hydrolysis products.

REFERENCES:
patent: 1924206 (1933-08-01), Hansen
patent: 4098886 (1978-07-01), Nicklin et al.
patent: 4210526 (1980-07-01), Swanson

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