Oil soluble photographic coupler reclamation process

Details Oil soluble photographic coupler reclamation process Oil soluble photographic coupler reclamation process

1978-07-24

1980-11-18

Bascomb, Jr., Wilbur L.

Distillation: processes, separatory

Vaporization zone under positive pressure or vacuum

203 39, 430449, B01D 312, G03C 108

Patent

active

042343925

ABSTRACT:
A process for reclaiming a photographic coupler from an aqueous oil-in-water emulsion of a coupler solvent oil having an oil-soluble photographic coupler dissolved therein comprising separating the coupler solvent oil containing the photographic coupler dissolved therein from the aqueous oil-in-water emulsion, and subjecting the separated coupler solvent oil containing the photographic coupler dissolved therein to a high vacuum molecular distillation whereby only the coupler solvent oil is removed as a distillate.

REFERENCES:
patent: 2406421 (1946-08-01), Wollner et al.
patent: 2446997 (1948-08-01), Brewer et al.
patent: 3458574 (1969-07-01), Anselm et al.
patent: 3496065 (1970-02-01), Russell
patent: 3655753 (1972-04-01), Cooley
patent: 3915712 (1975-10-01), Herzhoff et al.
patent: 4053066 (1977-10-01), Tkac et al.

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