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

Similar Documents

Publication Publication Date Title
US3189407A (en) Method of recovering lithium from lepidolite
GB1023545A (en) Process of leaching copper-containing ore and the electrowinning of copper
GB499201A (en) Process for the production and recovery of metals
GB745601A (en) Improvements in or relating to process for treating caustic aluminate liquor
US2507175A (en) Silver recovery
GB384608A (en) An improved process for making igniting charges for detonating and percussion caps
GB579459A (en) Process for the purification of 4-hydroxycoumarins
GB1367102A (en) Process for the reduction of the phosphorus content of iron ores
GB591801A (en) Method of recovering copper and other metals from solutions
US2196764A (en) Silver recovery using an alkali hydroxide
GB1252081A (en)
GB447626A (en) Improvements in recovering precious metals
SU46845A1 (en) The method of deposition of gold or silver from cyanide solutions
GB499610A (en) Improvements in or relating to the treatment of spent alkali metal hydroxide reagentfrom caustic-alkali lead or lead alloy refining processes
SU552294A1 (en) Mercury recovery method
GB425648A (en) Treatment of ores, metallurgical by-products and the like to effect a separation of selenium from precious metals
GB622495A (en) Improvements relating to the treatment of laundry and the like trade effluents
GB418714A (en) An improved process for making pure chromium compounds
GB365981A (en) Improved method of purifying hot spent pickle liquors from steel mills, and the like
JPS55158128A (en) Treatment of indium hydroxide precipitate containing coexistent other metal component
UA141299U (en) METHOD OF PROCESSING POLYMINERAL SOLUTIONS CONTAMINATED WITH HEAVY METALS
GB240253A (en) Improvements in the purification of sugar solutions
GB203708A (en) Process for the production of aluminium-fluoride-alkali-fluoride double compounds technically free from iron
GB915486A (en) Recovery of demethylchlortetracycline
GB1027362A (en) Process of recovering fluorine, sodium, and aluminium compounds from wastes from aluminium furnaces