Cost effective process for detoxification of cyanide-containing

Details Cost effective process for detoxification of cyanide-containing Cost effective process for detoxification of cyanide-containing

1990-12-17

1993-01-12

Hruskoci, Peter

Liquid purification or separation

Processes

Chemical treatment

210759, 210763, 210904, C02F 172

Patent

active

051787750

ABSTRACT:
This invention pertains to a method of treating cyanide contained in wastewater with particularly high levels of solids in the stream. The process involves either simultaneous or step-wise dosage of hydrogen peroxide in the form of an aqueous solution of a concentration between 35% to 90% by weight, preferably at least 50% by weight, and SO.sub.2 either in the form of gaseous SO.sub.2 or solution of sodium and/or potassium sulfite or metabisulfite resulting in the conversion of cyanide ions to non-toxic cyanate ions.

REFERENCES:
patent: 3617567 (1971-11-01), Mathre
patent: 4615873 (1986-10-01), Devuyst et al.
patent: 4622149 (1986-11-01), Devuyst et al.

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