GB499201A - Process for the production and recovery of metals - Google Patents

Process for the production and recovery of metals

Info

Publication number
GB499201A
GB499201A GB1950637A GB1950637A GB499201A GB 499201 A GB499201 A GB 499201A GB 1950637 A GB1950637 A GB 1950637A GB 1950637 A GB1950637 A GB 1950637A GB 499201 A GB499201 A GB 499201A
Authority
GB
United Kingdom
Prior art keywords
liquor
sludge
flocculating agent
metal
precipitate
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
GB1950637A
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.)
Eastman Kodak Co
Original Assignee
Eastman Kodak Co
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 Eastman Kodak Co filed Critical Eastman Kodak Co
Priority to GB1950637A priority Critical patent/GB499201A/en
Publication of GB499201A publication Critical patent/GB499201A/en
Expired legal-status Critical Current

Links

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
    • 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
    • G03C5/3952—Chemical, mechanical or thermal methods, e.g. oxidation, precipitation, centrifugation

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)
  • Removal Of Specific Substances (AREA)

Abstract

Aqueous liquors such as waste photographic liquors containing silver are treated for the recovery of metal by adding a flocculating agent to deposit a sludge containing metal and an auxiliary precipitate, separating the clear liquor, adding an agent such as an acid or alkali which dissolves the auxiliary precipitate and thereby reduces the volume of the sludge, and recovering the metal from the remaining sludge. The dissolved precipitate may be used as the flocculating agent for further quantities of liquor. A soluble chloride may be added to the liquor before treatment with the flocculating agent to diminish the solubility of the silver. The flocculating agent may be aluminium sulphate, sodium aluminate, copper sulphate or ferric chloride, and before its addition the pH value of the liquor may be adjusted to 6-8. An aqueous extract of the slag resulting from smelting the sludge with alkaline fluxes may be used as precipitant in the earlier part of the process.ALSO:Aqueous liquors such as waste photographic liquors containing silver are treated for the recovery of metal by adding a flocculating agent to deposit a sludge containing metal and an auxiliary precipitate, separating the clear liquor, adding an agent such as an acid or alkali which dissolves the auxiliary precipitate and thereby reduces the volume of the sludge, and recovering the metal from the remaining sludge. The dissolved precipitate may be used as the flocculating agent for further quantities of liquor. A soluble chloride may be added to the liquor before treatment with the flocculating agent to diminish the solubility of the silver. The flocculating agent may be aluminium sulphate, sodium aluminate, copper sulphate, or ferric chloride, and before its addition the pH value of the liquor may be adjusted to 6-8. The recovery of the metal from the treated sludge may be effected by smelting with the aid of fluxes such as silica, soda ash, borax, or fluorspar, with or without caustic soda, sodium nitrate, or sodium chloride. The resulting slag may be treated with water and the solution may be used as precipitant in the earlier part of the process.
GB1950637A 1937-07-14 1937-07-14 Process for the production and recovery of metals Expired GB499201A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1950637A GB499201A (en) 1937-07-14 1937-07-14 Process for the production and recovery of metals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1950637A GB499201A (en) 1937-07-14 1937-07-14 Process for the production and recovery of metals

Publications (1)

Publication Number Publication Date
GB499201A true GB499201A (en) 1939-01-16

Family

ID=10130491

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1950637A Expired GB499201A (en) 1937-07-14 1937-07-14 Process for the production and recovery of metals

Country Status (1)

Country Link
GB (1) GB499201A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5008017A (en) * 1989-12-08 1991-04-16 Eastman Kodak Company Method for recovering metals from waste liquors

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5008017A (en) * 1989-12-08 1991-04-16 Eastman Kodak Company Method for recovering metals from waste liquors
WO1991009145A2 (en) * 1989-12-08 1991-06-27 Eastman Kodak Company Method for recovering metals from waste liquors
WO1991009145A3 (en) * 1989-12-08 1991-08-08 Eastman Kodak Co Method for recovering metals from waste liquors

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