GB683335A - Process and apparatus for electrolytic regeneration of photographic fixing baths - Google Patents

Process and apparatus for electrolytic regeneration of photographic fixing baths

Info

Publication number
GB683335A
GB683335A GB2282650A GB2282650A GB683335A GB 683335 A GB683335 A GB 683335A GB 2282650 A GB2282650 A GB 2282650A GB 2282650 A GB2282650 A GB 2282650A GB 683335 A GB683335 A GB 683335A
Authority
GB
United Kingdom
Prior art keywords
solution
cathode
photographic fixing
anodes
shaft
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.)
Expired
Application number
GB2282650A
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.)
Individual
Original Assignee
Individual
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
Application filed by Individual filed Critical Individual
Publication of GB683335A publication Critical patent/GB683335A/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
    • C25C7/007—Constructional parts, or assemblies thereof, of cells; Servicing or operating of cells of cells comprising at least a movable electrode
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electrolytic Production Of Metals (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)

Abstract

683,335. Electrolytic regeneration of photographic fixing solutions. LEVERENZ, W. Sept. 18, 1950 [Oct. 18, 1949], No. 22826/50. Class 41. A process for regenerating photographic fixing solutions and recovering silver therefrom comprises subjecting the solution to electrolytic action, the solution being circulated by rotation, in the vicinity of a fixed cylindrical cathode, of electrodes consisting of carbon strips, rods or the like mounted on arms secured to a rotatable shaft. The apparatus shown comprises a cylindrical vessel 1, a cylindrical cathode 4, non-corrodible material such as chromium-nickel steel, and carbon anodes 2a, 2b, 3a, 3b suspended by arms 5 from a shaft 7 which is rotated. The anodes are in pairs, one anode of each pair being outside the cathode and the other anode inside the cathode. The shaft 7 is supported in a bearing 10 on which is mounted a carbon ring 11 connected to the positive lead of a source of current. The current is transferred to the anodes through a ring 12. Silver is recovered from the solution of electrolytic action, the voltage being from 6 to 12 volts and the current density being preferably 1 Î 10-3 amps/sq. cm. Acidity is restored to the solution by the addition of potassium metabisulphate.
GB2282650A 1949-10-18 1950-09-18 Process and apparatus for electrolytic regeneration of photographic fixing baths Expired GB683335A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1949L0000104 DE889261C (en) 1949-10-18 1949-10-18 Process and device for the electrolytic regeneration of used photographic fixing baths

Publications (1)

Publication Number Publication Date
GB683335A true GB683335A (en) 1952-11-26

Family

ID=7254730

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2282650A Expired GB683335A (en) 1949-10-18 1950-09-18 Process and apparatus for electrolytic regeneration of photographic fixing baths

Country Status (4)

Country Link
BE (1) BE498772A (en)
CH (1) CH292103A (en)
DE (1) DE889261C (en)
GB (1) GB683335A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1133565B (en) * 1958-04-21 1962-07-19 Gertrud Dettweiler Geb Schultz Device for the electrolytic deposition of silver from photographic fixing baths
DE1176373B (en) * 1959-04-18 1964-08-20 Arnold & Richter Kg Device for the electrolytic recovery of silver from photographic fixing baths

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE621677C (en) * 1932-12-02 1935-11-11 Film Fabrikation Ag F Process for the regeneration and desilvering of fixing salt solutions

Also Published As

Publication number Publication date
CH292103A (en) 1953-07-31
BE498772A (en)
DE889261C (en) 1953-09-10

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