Destruction of cyanide and other pollutants in aqueous solutions

Details Destruction of cyanide and other pollutants in aqueous solutions Destruction of cyanide and other pollutants in aqueous solutions

1992-12-22

1993-09-21

Wyse, Thomas

Liquid purification or separation

Processes

Chemical treatment

210763, 210766, 210904, C02F 158

Patent

active

052465985

ABSTRACT:
A method is disclosed for detoxifying an aqueous waste solution containing cyanide. The method involves adding a source of silicon oxide to the cyanide containing aqueous waste solution in a concentration of 0.001 to 10 g silicon dioxide/liter aqueous waste solution, at an alkaline pH and a temperature of from 10.degree. to 100.degree. C. Hydrogen peroxide or another peroxygen compound is added in a sufficient quantity to convert the aqueous waste solution containing cyanide to an aqueous solution containing environmentally less toxic materials.

REFERENCES:
patent: 3617567 (1971-11-01), Mathre
patent: 4743381 (1988-05-01), Bull
patent: 4751005 (1988-06-01), Mitsui et al.
patent: 4786418 (1988-11-01), Garg et al.
patent: 4793933 (1988-12-01), Rostoker et al.
patent: 5093007 (1992-03-01), Domville

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