EP 0035008 B1 19850130 - PROCESS AND APPARATUS FOR TREATING PHOTOGRAPHIC BATHS
Title (en)
PROCESS AND APPARATUS FOR TREATING PHOTOGRAPHIC BATHS
Publication
Application
Priority
LU 82188 A 19800221
Abstract (en)
[origin: US4377456A] The process for treating a photographic fixing bath, in order to remove therefrom the silver in metallic form by electrolysis in an electrolysis cell comprising at least one cathode on which the silver is deposited, two anodes and a control electrode placed in the vicinity of the cathode, comprises the step of adjusting the intensity of the electrolysis current by measuring the potential difference between a cathode serving as a working electrode and the control electrode. The apparatus for treating a photographic fixing bath in order to remove therefrom the silver comprises an electrolytic cell containing, as electrodes, at least one cathode and anodes as well as a control electrode made of pure carbon immersed in a stirred electrolytic bath, the voltage of this control electrode being maintained at a constant reference value and the potential on this control electrode serving to control the electrolysis current in operation.
IPC 1-7
IPC 8 full level
G03C 5/38 (2006.01); C25C 1/20 (2006.01); C25C 7/06 (2006.01); C25D 21/12 (2006.01); G03C 5/395 (2006.01); G03D 3/06 (2006.01); G03D 13/00 (2006.01)
CPC (source: EP US)
C25C 1/20 (2013.01 - EP US); C25C 7/06 (2013.01 - EP US); C25D 21/12 (2013.01 - EP US); G03C 5/3954 (2013.01 - EP US); G03D 3/065 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI NL SE
DOCDB simple family (publication)
EP 0035008 A2 19810902; EP 0035008 A3 19820609; EP 0035008 B1 19850130; AT E11602 T1 19850215; DE 3168559 D1 19850314; JP S56138737 A 19811029; LU 82188 A1 19810910; US 4377456 A 19830322
DOCDB simple family (application)
EP 81870013 A 19810216; AT 81870013 T 19810216; DE 3168559 T 19810216; JP 2483081 A 19810221; LU 82188 A 19800221; US 23741381 A 19810223