Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge
Patent
1979-05-30
1981-03-17
Prescott, Arthur C.
Chemistry: electrical and wave energy
Processes and products
Electrostatic field or electrical discharge
204109, 204301, B01K 1302
Patent
active
042565596
ABSTRACT:
An apparatus for regenerating a spent photograhic bleach-fixer solution, comprising (a) an electrodialysis cell including a cathode, an anode and alternating anion exchange membranes and cation exchange membranes arranged therebetween to define a cathode compartment, a plurality of alternating intermediate enionation and deionation compartments and an anode compartment, (b) an electrolysis cell connected to the enionation compartments of the electrodialysis cell so that an aqueous solution capable of dissolving silver salts can be circulated between the electrolysis cell and the enionation compartments, (c) a circulating tank for the spent bleach-fixer solution connected to the deionation compartments and the anode compartment of the electrodialysis cell for circulating the spent bleach-fixer solution between the circulating tank and both the deionation compartments and the anode compartment, and (d) a circulating tank for an electrolyte solution connected to the cathode compartment of the electrodialysis cell for circulating the electrolyte solution between the circulating tank and the cathode compartment; and a method for regenerating a spent photographic bleach-fixer solution using aforesaid apparatus.
REFERENCES:
patent: 3925175 (1975-12-01), Fisch et al.
patent: 4036715 (1977-07-01), Baden et al.
patent: 4128464 (1978-12-01), Idota
patent: 4145271 (1979-03-01), Nosse et al.
Iribe Seiki
Ono Takezo
Watanabe Mineo
Prescott Arthur C.
Teijin Engineering Ltd.
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