Regeneration of cyanide by oxidation of thiocyanate

Details Regeneration of cyanide by oxidation of thiocyanate Regeneration of cyanide by oxidation of thiocyanate

1994-08-19

1996-01-09

Niebling, John

Chemistry of inorganic compounds

Nitrogen or compound thereof

Carbon containing

423377, 204110, 204DIG13, 210760, C01C 300

Patent

active

054826942

ABSTRACT:
Provided is a method for regenerating cyanide from thiocyanate. The method comprises contacting the thiocyanate with an oxidizing gas containing ozone, generally a mixture of oxygen and ozone. The pH of the contacting medium is generally less than 7.0 to assure that HCN is the predominant species relative to CN.sup.-. The method has important applications to processes involving cyanidation procedures, such as gold leaching, plating and coal conversion.

REFERENCES:
patent: 2795544 (1957-06-01), Williams
patent: 4024037 (1977-05-01), Bishop et al.
patent: 4250030 (1981-02-01), Kuit et al.
patent: 4312760 (1982-01-01), Neville
patent: 4537686 (1985-08-01), Borbely
patent: 4615873 (1986-10-01), Devuyst et al.
patent: 5169615 (1992-12-01), Jennings
patent: 5364605 (1994-11-01), Pfeffer

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