Thioether substituted silver halide solvents

Details Thioether substituted silver halide solvents Thioether substituted silver halide solvents

1976-09-30

1978-11-21

Schilling, Richard L.

Gas separation: apparatus

Electric field separation apparatus

Electrode cleaner, apparatus part flusher, discharger, or...

96 29D, 96 61R, 96 61M, 96 76R, 96 76C, 96 77, 96 95, G03C 554, G03C 538, G03C 148, G03C 140

Patent

active

041264592

ABSTRACT:
Difunctional compounds wherein one of said functions is a hard or soft atom that ionizes to the corresponding anion in alkaline solution to combine with silver cation and the other of said functions is a non-ionizable soft base that additionally combines with said silver cation are employed as silver halide complexing agents in photography. In a preferred embodiment, the difunctional compounds possess (a) an O, N or C atom that ionizes to the corresponding O.sup..crclbar., N.sup..crclbar. or C.sup..crclbar. anion in basic solution and (b) an --S-- containing moiety excluding --SH and moieties that form --S.sup..crclbar. in basic solution wherein the --S-- of said moiety is positioned alpha, beta, gamma, delta, epsilon or zeta to said anion.

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