Removal of complexed zinc-cyanide from wastewater

Details Removal of complexed zinc-cyanide from wastewater Removal of complexed zinc-cyanide from wastewater

1984-06-13

1985-09-24

Hruskoci, Peter

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210724, 210726, 210904, 210912, 75107, 423101, 423367, C02F 152

Patent

active

045431892

ABSTRACT:
A method of removing complexed zinc-cyanide from wastewater involving a multiple stage process including, in a first step, control of ferrous ions to a critical minimum concentration of 250 to 400 ppm, together with pH control in the first and also a second step, together with recycling of a portion of sludge precipitated in the process.

REFERENCES:
patent: 3575853 (1971-04-01), Gaughan et al.
patent: 3738932 (1973-06-01), Kostenbader
patent: 3931007 (1976-01-01), Sugano et al.
patent: 4169053 (1979-09-01), Sakakibara et al.
patent: 4211646 (1980-07-01), Westbrook et al.
patent: 4312760 (1982-01-01), Neville
patent: 4465597 (1984-08-01), Herman et al.

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