Method of disposing of photographic fixer and developer

Details Method of disposing of photographic fixer and developer Method of disposing of photographic fixer and developer

1992-11-02

1994-01-04

Hruskoci, Peter A.

Hydraulic and earth engineering

Subterranean waste disposal, containment, or treatment

With treatment of waste

210710, 210747, 210751, 210912, 588255, B09B 300

Patent

active

052755096

ABSTRACT:
A method of disposing of photographic fixer and developer. The fixer and developer, preferably in equal quantities, are mixed and the mixture combined with an absorbing polymer which is substantially insoluble in the mixture of photographic fixer and developer. The polymer is capable of absorbing at least approximately 20 times its weight of the electrolytic aqueous base solution of fixer and developer. Once immobilized, the silver precipitates as insoluble silver sulfide and the mixture can be disposed of in a landfill or similar site designed to receive nontoxic waste.

REFERENCES:
patent: 4690971 (1987-09-01), Flesher
patent: 4791013 (1988-12-01), Koboshi et al.
patent: 4800024 (1989-01-01), Elfline
patent: 4876036 (1989-10-01), Candau et al.
patent: 5132022 (1992-07-01), Woog

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