Treatment method for treating effluents from a photographic deve

Details Treatment method for treating effluents from a photographic deve Treatment method for treating effluents from a photographic deve

1996-10-29

1998-02-17

Le, Hoa Van

Radiation imagery chemistry: process, composition, or product th

Regenerating image processing composition

430399, 430400, G03C 531, G03C 5395, G03C 744

Patent

active

057190100

ABSTRACT:
The present invention relates to a treatment method for treating effluents from a photographic development process, particularly a redox amplification (RX) development process, which is operated at an alkaline pH and is buffered with a phosphate buffer, said treatment method being characterized by the addition to the effluents of a Group II or Group III metal cation which forms an aqueous insoluble or substantially insoluble phosphate salt, thereby to precipitate phosphate salt from the effluent, and to reduce the pH of the effluent.

REFERENCES:
patent: 3674490 (1972-07-01), Matejec
patent: 3765891 (1973-10-01), Travis
patent: 5171658 (1992-12-01), Fyson

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