Process for extracting halide ions from fixing baths used in pho

Details Process for extracting halide ions from fixing baths used in pho Process for extracting halide ions from fixing baths used in pho

1996-02-06

1997-05-27

Le, Hoa Van

Radiation imagery chemistry: process, composition, or product th

Regenerating image processing composition

430400, G03C 5395

Patent

active

056331258

ABSTRACT:
The invention concerns a process for the selective extraction of the halide ions from photographic fixing solutions.
The process consists of bringing the photographic fixing solution into contact with a liquid membrane comprising a solvent and a crown-ether carrier capable of carrying the halide ions from the fixing solution into an aqueous solution which is thus loaded with halides, and is then removed.

REFERENCES:
patent: 3925175 (1975-12-01), Fisch et al.
patent: 5219717 (1993-06-01), Schmittou et al.
V. T. Stannett & W. J. Koros, Recent Advances in Membrane Science and Technology, (1979), pp. 69-121.
R. M. Izatt, et al., "Facilitated Transport from Ternary Cation Mixtures Through Water-Chloroform-Water . . . ", (1984), pp. 273-284.
J. D. Lamb, et al., "Effect of Salt Concentration and Anion on the Rate of Carrier-Facilitated . . . ", (1980), pp. 3399-3403.

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