DE889261C - Process and device for the electrolytic regeneration of used photographic fixing baths - Google Patents

Process and device for the electrolytic regeneration of used photographic fixing baths

Info

Publication number
DE889261C
DE889261C DE1949L0000104 DEL0000104A DE889261C DE 889261 C DE889261 C DE 889261C DE 1949L0000104 DE1949L0000104 DE 1949L0000104 DE L0000104 A DEL0000104 A DE L0000104A DE 889261 C DE889261 C DE 889261C
Authority
DE
Germany
Prior art keywords
photographic fixing
electrolytic regeneration
fixing baths
silver
fixer
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
DE1949L0000104
Other languages
German (de)
Inventor
Wilhelm Dr-Ing Leverenz
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.)
LAND BADEN WUERTTEMBERG
Original Assignee
LAND BADEN WUERTTEMBERG
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
Priority to BE498772D priority Critical patent/BE498772A/xx
Application filed by LAND BADEN WUERTTEMBERG filed Critical LAND BADEN WUERTTEMBERG
Priority to DE1949L0000104 priority patent/DE889261C/en
Priority to GB2282650A priority patent/GB683335A/en
Priority to CH292103D priority patent/CH292103A/en
Application granted granted Critical
Publication of DE889261C publication Critical patent/DE889261C/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25CPROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
    • C25C1/00Electrolytic production, recovery or refining of metals by electrolysis of solutions
    • C25C1/20Electrolytic production, recovery or refining of metals by electrolysis of solutions of noble metals
    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25CPROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
    • C25C7/00Constructional parts, or assemblies thereof, of cells; Servicing or operating of cells
    • C25C7/007Constructional parts, or assemblies thereof, of cells; Servicing or operating of cells of cells comprising at least a movable electrode
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03CPHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C5/00Photographic processes or agents therefor; Regeneration of such processing agents
    • G03C5/26Processes using silver-salt-containing photosensitive materials or agents therefor
    • G03C5/395Regeneration of photographic processing agents other than developers; Replenishers therefor
    • G03C5/3954Electrical 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)

Description

Die Erfindung bezieht sich auf ein Verfahren und eine Vorrichtung zur elektrolytischen: Regeneration von verbrauchten Fixierbädern. The invention relates to a method and a device for the electrolytic regeneration of used fixing baths.

Es ist bekannt, daß die photographischen Halogensilberschichten nur zu etwa Vs zum Aufbau des Bildes dienen. Der übrige Teil der silberhaltigen Emulsion wird durch die Natriumthiosulfatlösung der Fixierbäder gelöst und das Bild dadurch haltbar gemacht. Bei langem Gebrauch des Fixierbades reichert sich dieses so mit Silber an, daß es für eine weitere Verwendung nicht mehr dienlich ist und durch ein neues Bad ersetzt werden muß. Das in dem verbrauchten Fixierbad enthaltene Silber" ist seit jeher auf verschiedene Weise wieder zurückgewonnen worden, entweder durch chemische Ausfällung des Silbers mittels Schwefelnatrium oder Zink. Es sind auch von den einschlägigen Firmen Spezialfällungsmittel auf den Markt gebracht worden, die eine bequemere und vollständigere Fällung erreichen sollen. Allen diesen Methoden haften bestimmte Nachteile an, auf die hier nicht näher eingegangen werden soll, die aber dazu führen, daß viele kleinere Photobetriebe auf die Verwertung der verbrauchten Fixierbäder ganz verzichten. Die dadurch eintretenden Verluste an Silber sind volkswirtschaftlich nicht unbedeutend. Bei Großbetrieben hat sich als beste und rentabelste Rückgewinnungsart dieIt is known that the photographic silver halide layers are only about Vs for construction serve the image. The remaining part of the silver-containing emulsion is made up by the sodium thiosulfate solution of the fixers and made the picture durable. With long use of the fixer, this is so enriched with silver that it is not suitable for further use is more useful and needs to be replaced by a new bathroom. That in the used fixer silver "has always been recovered in various ways, either by chemical precipitation of silver using sodium sulphide or zinc. There are also from the Relevant firms have put special precipitants on the market, which are more convenient and aim to achieve more complete precipitation. All of these methods have certain disadvantages, which will not be dealt with in more detail here, but which mean that many smaller photo companies start to recycle the used ones Do not use fixers at all. The resulting losses of silver are economic not insignificant. In large companies, the best and most profitable type of recovery has been

elektrolytische Regeneration der Fixierbäder bewährt. Eine derartige Anlage lohnt sich jedoch nur für Anstalten mit großem Umsatz an Fixierbad. Bei derartigen Anlagen -wird- - mit stehenden Elektroden und sehr rasch bewegten Elektrolyten gearbeitet, d. h. das zu bearbeitende Fixierbad wurde mit großer Geschwindigkeit an den Kathoden aus Edelstahl und den Anoden aus Graphit vorbeibewegt. Versuche des ErfindersElectrolytic regeneration of the fixer baths proven. However, such a system is only worthwhile for institutions with high sales of fixer. In such systems -will- - with standing Electrodes and very rapidly moving electrolytes worked, d. H. the fixer to be processed was at great speed on the stainless steel cathodes and the anodes off Graphite moving past. Attempts by the inventor

ίο hatten bereits ergeben, daß mit bewegten Elektroden gute Erfolge zu erzielen waren. Es ist jedoch nach beiden Verfahren unmöglich, alles Silber aus den Bädern zu entfernen. Dies ist dann auch nicht erforderlich, wenn sich das zu be-ίο had already shown that with moving electrodes good results were achieved. However, by either method it is impossible to do everything Remove silver from the baths. This is then also not necessary if this has to be

.15 arbeitende Fixierbad im ständigen Umlauf, von den Fixierbo'ttichen zur Regenerieranlage und wieder dorthin zurück befindet.- Es wird- immersoviel Silber entfernt, um das Fixierbad brauchbar zu erhalten und somit praktisch alles Silber zurückgewonnen. Anders liegen die Verhältnisse aber dann, wenn ein ständiger Umlauf aus betrieblichen Gründen nicht möglich ist. Die Fixierbäder solcher Photobetriebe werden nun ziemlich allgemein von entsprechenden Firmen abgeholt, die sich ausschließlich mit der Aufarbeitung verbrauchter Fixierbäder befassen. Dies lohnt sich jedoch nur dort, wo der Transport nicht zu weit ist..15 working fixer in constant circulation, from the fixer to the regeneration system and back there. - There is always enough silver removed to make the fixer usable and thus recovered practically all of the silver. But the situation is different when constant circulation is not possible for operational reasons. The fixers such Photo companies are now being picked up by corresponding companies that are exclusively deal with the reconditioning of used fixers. However, this is only worth it where the transport is not too far.

Gegenstand der vorliegenden Erfindung ist nun ein Verfahren, bei dem sowohl der Elektrolyt wie auch die Elektroden rasch bewegt werden und eine transportable Regenerieranlage. Vorteilhaft werden hierzu rasch bewegte Anoden als Rührwerk ausgebildet, die den Elektrolyt sehr schnell an den feststehenden Kathoden vorbeiführen, am besten in runden Gefäßen. Hierdurch wird eine durchaus .befriedigende Ausbeute an Silber erzielt; die Fixierbäder können nach eventuell erforderlicher Filtrierung ständig von neuem benutzt werden. Es bedarf lediglich des Zusatzes des sauren Bestandteiles des Fixierbades, wenn dieses durch das Hineintragen von Alkali aus den Entwicklerlösungen abgestumpft sein sollte, was sich aber durch das Zwischenschalten eines Unterbrechers, vornehmlich Kaliumetabisulfit, vermeiden läßt. Eine derartige Anlage läßt sich in ihrer Größe auf jeden, auch den kleinsten Betrieb abstimmen.The present invention is a method in which both the electrolyte as also the electrodes can be moved quickly and a transportable regeneration system. Become beneficial this rapidly moving anodes designed as a stirrer, which the electrolyte very quickly to the Lead by fixed cathodes, ideally in round vessels. This definitely becomes a .satisfactory yield of silver achieved; the fixers can be used as required Filtration must be used over and over again. All that is required is the addition of the acidic component of the fixer, if this is caused by the addition of alkali from the developer solutions should be blunted, but this is mainly due to the interposition of a breaker Potassium metabisulfite, can be avoided. Such a system can be of any size, too coordinate the smallest operation.

Claims (2)

Patentansprüche:Patent claims: 1. Verfahren zur elektrolytischen Regeneration von verbrauchten photographischen Fixierbädern, dadurch gekennzeichnet, daß durch rotierende Elektroden, vornehmlich als Rührwerk ausgebildete Anoden, der Elektrolyt in einem runden Badgefäß in schnelle Bewegung versetzt wird.1. Process for the electrolytic regeneration of spent photographic Fixing baths, characterized in that by rotating electrodes, primarily as Agitator-shaped anodes, the electrolyte in a round bath vessel in rapid motion is moved. 2. Vorrichtung zur Ausführung des Verfahrens nach Anspruch 1, gekennzeichnet durch ein transportables, rundes Elektrolysiergefäß und drehbare Elektroden, insbesondere als So Rührwerk ausgebildete Anoden.2. Apparatus for performing the method according to claim 1, characterized by a transportable, round electrolyzer and rotating electrodes, especially as a sun Agitator trained anodes. Angezogene Druckschriften:
Deutsche Patentschrift Nr. 621 677.
Referred publications:
German patent specification No. 621 677.
I 5389 8.53I 5389 8.53
DE1949L0000104 1949-10-18 1949-10-18 Process and device for the electrolytic regeneration of used photographic fixing baths Expired DE889261C (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BE498772D BE498772A (en) 1949-10-18
DE1949L0000104 DE889261C (en) 1949-10-18 1949-10-18 Process and device for the electrolytic regeneration of used photographic fixing baths
GB2282650A GB683335A (en) 1949-10-18 1950-09-18 Process and apparatus for electrolytic regeneration of photographic fixing baths
CH292103D CH292103A (en) 1949-10-18 1950-10-18 Method and device for the electrolytic regeneration of used photographic fixing baths.

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
DE889261C true DE889261C (en) 1953-09-10

Family

ID=7254730

Family Applications (1)

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

Country Status (4)

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

Cited By (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

Citations (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

Patent Citations (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

Cited By (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

Also Published As

Publication number Publication date
BE498772A (en)
CH292103A (en) 1953-07-31
GB683335A (en) 1952-11-26

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