Method for separating and recovering color developing agent

Details Method for separating and recovering color developing agent Method for separating and recovering color developing agent

1984-06-01

1986-08-19

Cintins, Ivars

Liquid purification or separation

Processes

Ion exchange or selective sorption

210692, 430399, B01D 1504

Patent

active

046068279

ABSTRACT:
A method and apparatus for separating and recovering a color developing solution from a color photographic processing solution with the aid of a cation exchange resin are disclosed. Said solution has a pH of not higher than 8.0 and is brought into contact with a cation exchange resin, which is in turn brought into contact with an alkali solution having a pH of not lower than 9.0.

REFERENCES:
patent: 3869383 (1975-03-01), Shimamura et al.
patent: 3931004 (1976-01-01), Shimamura et al.
patent: 4043907 (1977-08-01), Shimamura et al.
patent: 4159245 (1979-06-01), Matsushita et al.

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