Process of recovering silver from photographic solutions

Details Process of recovering silver from photographic solutions Process of recovering silver from photographic solutions

C - Chemistry, Metallurgy

22

B

C22B 11/00 (2006.01) C02F 1/54 (2006.01) C02F 1/62 (2006.01) G03C 5/395 (2006.01)

Patent

CA 2140567

A process for removing silver from a silver containing photoprocessing solution, comprising the steps of: a) mixing a mercapto-s-triazine, or a water soluble salt thereof, with the solution thereby causing formation of a mixture of i) precipitates and fines of silver mercapto-s-triazine and ii) the solution; b) mixing a copolymer flocculant with the mixture thereby causing flocculation and agglomeration of the silver TMT fines; wherein the copolymer i) consist of monomers selected from the group consisting of acryloyloxyethyl trimethylamine chloride and acrylamide and ii) has a reduced viscosity of 21 to 30 dL/g.

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