Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge
Patent
1980-06-16
1982-02-02
Prescott, Arthur C.
Chemistry: electrical and wave energy
Processes and products
Electrostatic field or electrical discharge
204301, B01D 1302
Patent
active
043138080
ABSTRACT:
A method of regenerating a waste photographic processing solution (e.g., a waste developing solution or a waste bleaching-fixing solution) by electrodialysis utilizing ion exchange membranes, which uses an electrodialyzer characterized by the arrangement of ion exchange membranes employed therein that a space between a cathode and an anode is partitioned by cation exchange membranes and anion exchange membranes alternately arranged, and an anode compartment is provided in a first place in the direction from the anode to the cathode, and wherein there is further provided a plural number of desalting compartments through each of which the waste photographic processing solution is passed, each of which compartments is partitioned by a cation exchange membrane on the cathode side and by an anion exchange membrane on the anode side, and an equal number of concentrating compartments, through each of which a specific solution for the concentrating compartment is passed, and each of which compartments is partitioned by an anion exchange membrane on the cathode side and by a cation exchange membrane on the anode side) arranged alternately in such a way that a desalting compartment is positioned on the side farthest from the anode, wherein a concentrating compartment that it is partitioned by cation exchange membranes on both sides thereof is provided adjacent to the cathode side of the desalting compartment partitioned on the side farthest from the anode, and a cathode compartment is provided adjacent to the last concentrating compartment, and wherein a common solution of electrolytes is supplied to both the cathode and the anode compartments of the electrolyzer and circulated therethrough.
REFERENCES:
patent: 2860095 (1958-11-01), Katz et al.
patent: 3395087 (1968-07-01), McElhinney et al.
patent: 4089760 (1978-05-01), Ono
patent: 4204930 (1980-05-01), Ono et al.
patent: 4207157 (1980-06-01), Hirai et al.
Idemoto Noboru
Matsushita Sachio
Tashiro Mamoru
Yamada Minoru
Fuji Photo Film Co. , Ltd.
Prescott Arthur C.
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