GB1445505A - Electrolytic recovery of silver manufacture of knitted articles - Google Patents

Electrolytic recovery of silver manufacture of knitted articles

Info

Publication number
GB1445505A
GB1445505A GB2833074A GB2833074A GB1445505A GB 1445505 A GB1445505 A GB 1445505A GB 2833074 A GB2833074 A GB 2833074A GB 2833074 A GB2833074 A GB 2833074A GB 1445505 A GB1445505 A GB 1445505A
Authority
GB
United Kingdom
Prior art keywords
solution
ferric
june
redox potential
ions
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
GB2833074A
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.)
Novartis AG
Original Assignee
Ciba Geigy 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
Application filed by Ciba Geigy AG filed Critical Ciba Geigy AG
Priority to GB2833074A priority Critical patent/GB1445505A/en
Priority to DE19752528140 priority patent/DE2528140A1/en
Priority to FR7519759A priority patent/FR2276402A1/en
Priority to IT5021375A priority patent/IT1044403B/en
Priority to JP50078682A priority patent/JPS585994B2/en
Publication of GB1445505A publication Critical patent/GB1445505A/en
Priority to US05/934,302 priority patent/US4186067A/en
Priority to US06/032,813 priority patent/US4211630A/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
    • 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
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electrolytic Production Of Metals (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)

Abstract

1445505 Recovering silver by electrodeposition CIBA-GEIGY AG 18 June 1975 [26 June 1974] 28330/74 Heading C7B Ag is recovered from a spent colour photographic bleach-fix solution 5 containing Ag ions and ferric ions by electrolysis in a cell 1 to deposit Ag on the rotating cathode 3, whilst continuously monitoring the redox potential of the solution, e.g. using a Pt + calomel pair of electrodes 4 connected to a milli-volt meter 8, and adding automatically a reducing agent, e.g. sodium dithionite, hydrazine, hydroxylamine, alkali metal (hypo) phosphite or borohydride, or ascorbic or sulphinic acid, either in aqueous solution 16 e.g. using a peristaltic pump 13 Fig. 1, or as powder e.g. in hopper 17 using an electrically driven Archimedian screw 18 Fig. 2, to the solution 5 when the redox potential rises above a predetermined level (-300 mV), e.g. using a potentiostat 9 connected to the meter 8 and a solenoid 10 which actuates a relay 11 in an electrical circuit powered by A.C. source 12 and which operates pump 13 or screw 18. The cathode may be of steel and the anode may be of carbon. The bleach-fix solution may contain a ferric-chelate complex as oxidizing agent and a water-soluble thiosulphate or thiocyanate as silver halide solvent or fixing agent, e.g. ferric ammonium EDTA, ammonium thiosulphate and sodium sulphite.
GB2833074A 1974-06-26 1974-06-26 Electrolytic recovery of silver manufacture of knitted articles Expired GB1445505A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
GB2833074A GB1445505A (en) 1974-06-26 1974-06-26 Electrolytic recovery of silver manufacture of knitted articles
DE19752528140 DE2528140A1 (en) 1974-06-26 1975-06-24 ELECTROLYTIC SILVER RECOVERY FROM PHOTOGRAPHIC BLEACH FIXING BATHS
FR7519759A FR2276402A1 (en) 1974-06-26 1975-06-24 ELECTROLYTIC MONEY RECOVERY FROM PHOTOGRAPHIC FIXING-BLEACHING BATHS
IT5021375A IT1044403B (en) 1974-06-26 1975-06-25 METHOD FOR RECOVERING SILVER FROM PHOTOGRAPHIC BATHS OF BLEACHING FIXING AND EQUIPMENT TO PERFORM IT
JP50078682A JPS585994B2 (en) 1974-06-26 1975-06-26 Electrolytic silver recovery method from photographic bleach constant bath
US05/934,302 US4186067A (en) 1974-06-26 1978-08-17 Electrolytic recovery of silver from photographic bleach-fix baths
US06/032,813 US4211630A (en) 1974-06-26 1979-04-23 Electrolytic recovery of silver from photographic bleach-fix baths

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2833074A GB1445505A (en) 1974-06-26 1974-06-26 Electrolytic recovery of silver manufacture of knitted articles

Publications (1)

Publication Number Publication Date
GB1445505A true GB1445505A (en) 1976-08-11

Family

ID=10273964

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2833074A Expired GB1445505A (en) 1974-06-26 1974-06-26 Electrolytic recovery of silver manufacture of knitted articles

Country Status (5)

Country Link
JP (1) JPS585994B2 (en)
DE (1) DE2528140A1 (en)
FR (1) FR2276402A1 (en)
GB (1) GB1445505A (en)
IT (1) IT1044403B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH626409A5 (en) * 1977-02-28 1981-11-13 Ciba Geigy Ag
JPS57115940A (en) * 1981-01-09 1982-07-19 Nippon Kokan Keishiyu Kk Method for manufacturing vanishing type model
US4406753A (en) * 1982-01-19 1983-09-27 Ciba-Geigy Ag Electrolytic metal recovery cell and operation thereof
DE3414653A1 (en) * 1983-04-25 1984-10-25 Exxon Research And Engineering Co., Florham Park, N.J. Process for the selective extraction of silver from an aqueous copper (I) chloride solution containing dissolved silver
JPS6142446A (en) * 1984-07-31 1986-02-28 Tsuneichi Koyama Production of three-dimensional figure body made of metal
JP2676644B2 (en) * 1990-04-27 1997-11-17 富士写真フイルム株式会社 Method and device for silver recovery of photographic processing liquid

Also Published As

Publication number Publication date
FR2276402A1 (en) 1976-01-23
DE2528140A1 (en) 1976-01-15
FR2276402B1 (en) 1977-07-22
IT1044403B (en) 1980-03-20
JPS585994B2 (en) 1983-02-02
JPS5118212A (en) 1976-02-13

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Legal Events

Date Code Title Description
PS Patent sealed
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19920618