EP0035008A3 - Process and apparatus for treating photographic baths - Google Patents

Process and apparatus for treating photographic baths Download PDF

Info

Publication number
EP0035008A3
EP0035008A3 EP81870013A EP81870013A EP0035008A3 EP 0035008 A3 EP0035008 A3 EP 0035008A3 EP 81870013 A EP81870013 A EP 81870013A EP 81870013 A EP81870013 A EP 81870013A EP 0035008 A3 EP0035008 A3 EP 0035008A3
Authority
EP
European Patent Office
Prior art keywords
control electrode
cathode
silver
electrolysis
treating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP81870013A
Other languages
French (fr)
Other versions
EP0035008A2 (en
EP0035008B1 (en
Inventor
Pierre F. Vandenput
Philippe A. De Meester
Jean-Pierre J. Heraly
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Esterol AG
Original Assignee
Esterol AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=19729355&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0035008(A3) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Esterol AG filed Critical Esterol AG
Priority to AT81870013T priority Critical patent/ATE11602T1/en
Publication of EP0035008A2 publication Critical patent/EP0035008A2/en
Publication of EP0035008A3 publication Critical patent/EP0035008A3/en
Application granted granted Critical
Publication of EP0035008B1 publication Critical patent/EP0035008B1/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
    • C25C1/00—Electrolytic production, recovery or refining of metals by electrolysis of solutions
    • C25C1/20—Electrolytic production, recovery or refining of metals by electrolysis of solutions of noble metals
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
    • C25C7/00—Constructional parts, or assemblies thereof, of cells; Servicing or operating of cells
    • C25C7/06—Operating or servicing
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D21/00—Processes for servicing or operating cells for electrolytic coating
    • C25D21/12—Process control or regulation
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
    • G03C5/26—Processes using silver-salt-containing photosensitive materials or agents therefor
    • G03C5/395—Regeneration of photographic processing agents other than developers; Replenishers therefor
    • G03C5/3954—Electrical methods, e.g. electroytic silver recovery, electrodialysis
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03D—APPARATUS FOR PROCESSING EXPOSED PHOTOGRAPHIC MATERIALS; ACCESSORIES THEREFOR
    • G03D3/00—Liquid processing apparatus involving immersion; Washing apparatus involving immersion
    • G03D3/02—Details of liquid circulation
    • G03D3/06—Liquid supply; Liquid circulation outside tanks
    • G03D3/065—Liquid supply; Liquid circulation outside tanks replenishment or recovery apparatus

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Metallurgy (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Electrolytic Production Of Metals (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
  • Photographic Developing Apparatuses (AREA)

Abstract

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.
EP81870013A 1980-02-21 1981-02-16 Process and apparatus for treating photographic baths Expired EP0035008B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81870013T ATE11602T1 (en) 1980-02-21 1981-02-16 METHOD AND APPARATUS FOR THE PREPARATION OF PHOTOGRAPHIC SOLUTIONS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU82188 1980-02-21
LU82188A LU82188A1 (en) 1980-02-21 1980-02-21 PROCESS AND APPARATUS FOR TREATING PHOTOGRAPHIC FIXER BATHS

Publications (3)

Publication Number Publication Date
EP0035008A2 EP0035008A2 (en) 1981-09-02
EP0035008A3 true EP0035008A3 (en) 1982-06-09
EP0035008B1 EP0035008B1 (en) 1985-01-30

Family

ID=19729355

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81870013A Expired EP0035008B1 (en) 1980-02-21 1981-02-16 Process and apparatus for treating photographic baths

Country Status (6)

Country Link
US (1) US4377456A (en)
EP (1) EP0035008B1 (en)
JP (1) JPS56138737A (en)
AT (1) ATE11602T1 (en)
DE (1) DE3168559D1 (en)
LU (1) LU82188A1 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2556374B1 (en) * 1983-12-12 1986-08-08 Joliot Robert DEVICE FOR MAINTAINING THE CONCENTRATION OF SILVER OF FIXING BATHS IN CINEMATOGRAPHIC OR PHOTOGRAPHIC LABORATORIES AT A DETERMINED VALUE
FR2582022B1 (en) * 1985-05-14 1988-02-19 Kodak Pathe METHOD AND DEVICE FOR REGULATING THE POSITION OF THE OPERATING POINT OF AN ELECTROLYSIS CELL
US4675085A (en) * 1985-07-31 1987-06-23 Adalberto Vasquez Method and apparatus for recovery of metal from solution
GB8927964D0 (en) * 1989-12-11 1990-02-14 Kodak Ltd Method and apparatus for recovering silver from a photographic fixing solution
EP0598144B1 (en) * 1992-11-10 1996-10-09 Agfa-Gevaert N.V. Use of a pH sensitive reference electrode in electrolytic desilvering
EP0754780B1 (en) * 1995-07-15 2001-11-21 Agfa-Gevaert N.V. Process for de-silvering a silver-containing solution
US5759377A (en) * 1995-07-15 1998-06-02 Agfa-Gevaert Process for de-silvering of a silver-containing solution
US5770034A (en) * 1995-07-15 1998-06-23 Agfa-Gevaert N.V. Process and apparatus for desilvering a silver-containing solution
GB9726534D0 (en) * 1997-12-17 1998-02-11 Eastman Kodak Co Determination of silver in a photographic solution

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1866701A (en) * 1929-03-13 1932-07-12 Eastman Kodak Co Method and apparatus for recovering silver from fixing solutions
DE1187806B (en) * 1962-03-21 1965-02-25 Bayer Ag Process and device for the recovery of silver from fixing baths
US4065374A (en) * 1976-08-10 1977-12-27 New Nippon Electric Co., Ltd. Method and apparatus for plating under constant current density

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4186067A (en) * 1974-06-26 1980-01-29 Ciba-Geigy Aktiengesellschaft Electrolytic recovery of silver from photographic bleach-fix baths
US4287044A (en) * 1980-03-31 1981-09-01 Silver Systems, Ltd. Silver recovery apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1866701A (en) * 1929-03-13 1932-07-12 Eastman Kodak Co Method and apparatus for recovering silver from fixing solutions
DE1187806B (en) * 1962-03-21 1965-02-25 Bayer Ag Process and device for the recovery of silver from fixing baths
US4065374A (en) * 1976-08-10 1977-12-27 New Nippon Electric Co., Ltd. Method and apparatus for plating under constant current density

Also Published As

Publication number Publication date
EP0035008A2 (en) 1981-09-02
LU82188A1 (en) 1981-09-10
EP0035008B1 (en) 1985-01-30
DE3168559D1 (en) 1985-03-14
ATE11602T1 (en) 1985-02-15
JPS56138737A (en) 1981-10-29
US4377456A (en) 1983-03-22

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