DE329051C - Process for the recovery of silver from thin emulsions produced in the manufacture of photographic fabrics - Google Patents

Process for the recovery of silver from thin emulsions produced in the manufacture of photographic fabrics

Info

Publication number
DE329051C
DE329051C DE1916329051D DE329051DD DE329051C DE 329051 C DE329051 C DE 329051C DE 1916329051 D DE1916329051 D DE 1916329051D DE 329051D D DE329051D D DE 329051DD DE 329051 C DE329051 C DE 329051C
Authority
DE
Germany
Prior art keywords
silver
recovery
photographic
fabrics
manufacture
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
DE1916329051D
Other languages
German (de)
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
Application granted granted Critical
Publication of DE329051C publication Critical patent/DE329051C/en
Expired legal-status Critical Current

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Classifications

    • 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
    • G03C11/00—Auxiliary processes in photography
    • G03C11/24—Removing emulsion from waste photographic material; Recovery of photosensitive or other substances

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Peptides Or Proteins (AREA)

Description

Verfahren zur Wiedergewinnung. von Silber aus bei der - Herstellung . photögraphischer Stoffe abfallenden dünnen Emulsionen. ' Die Erfindung betrifft eine weitere Ausbildung des durch Patent 32,3708 geschützten Verfahrens zur Wiedergewinnung des Silbers aus dünnen Emulsionen.Method of recovery. from silver in the production. thin emulsions of photographic substances falling off. The invention relates to a further development of the process protected by patent 32,3708 for the recovery of silver from thin emulsions.

Das neue Verfahren besteht darin, d@aß man in die Emulsion zwei oder drei Reagenzien einbringt, die durch ihre gegenseitige Einwirkung aufeinander einen flockigen oder gelatinösen Niederschlag erzeugen, der das Silber. zu Boden führt, so daB es: später durch irgendwelche Mittel ausgezogen werden kann. Geeignete Fällungsmittel sind: Tonerdehydrat, Eisenhydrat, Harz, Kasein usw., die nach irgendeiner der bekannten chemischen Reaktionen innerhalb der das Silber enthaltenden Emulsion ausgeschieden werden. Beispielsweise kann man eine Alaunlösung und darauf Ammoniak zusetzen oder eine ammoniakalische Lösung aus Harzseife oder Kasein benutzen, wonach dann Salzsäure zugefügt wird. -- Beispiel. ' 45001 Emulsion mit etwa 1130g metallischem Silber als Haloidsalz' und etwa 4,5. kg Gelatine erfordern 11,5 kg -gelöste schwefelsaure. Tonerde sowie 4,5 1 Ammoniak vom spei. Gew. 0,88o. Unter denselben Bedingungen sind anzuwenden 6,5 kg in einer wässerigen Lösung von - kg wasserfreiem kohlensauren Natron' gelöstes Harz und 4,51 konzentrierte Salzsäure, oder endlich i z kg in 285.1 1/1o prozentigem Ammoniak gelöstes Kasein sowie 2,8 kg konzentrierte Salzsäure.The new process consists in introducing two or three reagents into the emulsion which, through their mutual action, produce a flaky or gelatinous precipitate which contains the silver. leads to the ground so that it can later be pulled out by any means. Suitable precipitants are: alumina hydrate, iron hydrate, resin, casein, etc., which are precipitated after any of the known chemical reactions within the emulsion containing the silver. For example, an alum solution and then ammonia can be added or an ammoniacal solution of resin soap or casein can be used, after which hydrochloric acid is then added. -- Example. '45001 emulsion with about 1130g metallic silver as haloid salt' and about 4.5. kg of gelatine require 11.5 kg of dissolved sulfuric acid. Clay and 4.5 l ammonia from the spei. Wt. 0.88o. Under the same conditions, 6.5 kg of resin dissolved in an aqueous solution of - kg of anhydrous carbonate of soda and 4.5 l of concentrated hydrochloric acid, or finally iz kg of casein dissolved in 285.1 1/10 percent ammonia and 2.8 kg of concentrated hydrochloric acid are to be used.

Claims (1)

PATENT-ANBPRUcH: Ausführungsform des Verfahrens zur Wiedergewinnung von Silber aus bei-der Herstellung phötographischer Stoffe- abfallenden dünnen Emulsionen, dadurch gekennzeichnet, daB der das Silber enthaltenden Emulsion- zwei Reagenzien zugesetzt werden; z. B. zuerst eine Alaunlösung und dann Ammoniak oder zunächst eine Harzseife- oder Kaseinlösung und darauf Salzsäure, die durch ihre Wirkung aufeinander einen flockigen Niederschlag in der Emulsion hervorrufen, der das auszuziehende Silber enthält.PATENT CLAIM: Embodiment of the method of recovery of silver from thin emulsions during the production of photographic materials, characterized in that the emulsion containing the silver contains two reagents be added; z. B. first an alum solution and then ammonia or first a resin soap or casein solution and then hydrochloric acid, which act on each other cause a flaky precipitate in the emulsion, which is to be extracted Contains silver.
DE1916329051D 1916-10-19 1916-10-19 Process for the recovery of silver from thin emulsions produced in the manufacture of photographic fabrics Expired DE329051C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE329051T 1916-10-19

Publications (1)

Publication Number Publication Date
DE329051C true DE329051C (en) 1920-11-09

Family

ID=6186650

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1916329051D Expired DE329051C (en) 1916-10-19 1916-10-19 Process for the recovery of silver from thin emulsions produced in the manufacture of photographic fabrics

Country Status (1)

Country Link
DE (1) DE329051C (en)

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