Treatment plant for recovery of metal from hazardous waste

Details Treatment plant for recovery of metal from hazardous waste Treatment plant for recovery of metal from hazardous waste

1987-08-14

1989-01-24

Valentine, Donald R.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

204149, 204212, 204228, 204269, C25C 120, C02F 146, C25D 1700, C25D 1712

Patent

active

048000051

ABSTRACT:
A treatment plant for the recovery of silver from spent photo fix solution is provided in which the concentration of silver in the spent solution is reduced to meet Environmental Protection Agency standards in two sequential stages. In the first stage, silver is recovered electrolytically by plating out on vertically disposed, rotating cathodes as the spent solution flows from one electrode chamber to another arranged in serial fashion in the electrolytic unit assembly. The silver concentration is then further reduced by passing the overflow from the electrolytic unit upwardly through a column of shredded steel wool or ion exchange resin.

REFERENCES:
patent: 3637473 (1972-01-01), Greenspan et al.
patent: 3705716 (1972-12-01), Hendrickson
patent: 3715291 (1973-02-01), Bentley
patent: 3964990 (1976-06-01), Woyden
patent: 4257864 (1981-03-01), Gacki
patent: 4652352 (1987-03-01), Saieva

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