A process for the enhanced recovery of silver from autoclave discharge, comprising: oxidizing sulphide sulphur in an aqueous feed slurry in an autoclave to form an aqueous discharge slurry, the aqueous feed slurry comprising a silver-containing material, wherein at least most of the sulphide sulphur is oxidized to sulphate sulphur and wherein ...
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recovery process silver recovery silver recovery 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 AU25890/71A Other languages English (en) Inventor
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A process for the recovery of silver values from silver-containing material which also contains iron and arsenic includes leaching the material under oxidizing conditions at elevated temperature …
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A silver recovery device (30) is described for removing silver from a silver-containing solution. The device (30) comprises an ion-exchange resin bed (34) and a pump (62) for …
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Silver recovery process Download PDF Info Publication number US3649250A. ... Publication of US3649250A publication Critical patent/US3649250A/en Anticipated expiration legal-status Critical Status Expired - Lifetime …
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A process for treating a photographic developer solution containing silver ion comprises contacting the solution with a silver recovery element (10), which comprises a substrate (12) having thereon a hydrophilic colloid layer (16) containing physical development nickel. The contacting is carried out for a time sufficient to reduce the silver concentration in the developer …
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United States This invention relates to a method for recovering silver, and more particularly to a method for recovering silver from a solution of alkali metal silver cyanide or other silver...
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United States Patent 4302318. The invention illustratively contemplates recovery of silver from waste photographic-fixer solution, the apparatus being so devised and controlled that high …
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CA2090468C - Silver recovery process - Google Patents Silver recovery process Info Publication number ... Publication of CA2090468C publication Critical patent/CA2090468C/en Anticipated expiration legal-status Critical Status Expired - Fee Related legal-status Critical Current Links. Espacenet; Global Dossier;
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Silver is recovered from silver-containing scrap paper (e.g., scrap thermographic office copy paper) by a process which involves conditioning the silver-containing paper (e.g., with hot dilute aqueous sodium hydroxide) to thereby convert the silver in the paper from its usual organic acid salt form (e.g., silver behenate) into a different form of silver (e.g., converted into silver metal or ...
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An element and a process for recovering silver from a photographic developer solution containing silver ions. The silver recovery element (10) comprises a support (12) having a hydrophilic colloid layer (16) containing physical development nuclei on at least one of two opposing outer surfaces. Raised portions (20) space adjacent surfaces in the element's rolled-up configuration.
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The contacting is carried out for a sufficient time to reduce the concentration of silver in the developer solution to a desired level. The method is used in the treatment of a photographic...
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WO1993000610A1 - Silver recovery process - Google Patents Silver recovery process Download PDF Info Publication number ... Priority to DE69224359T priority patent/DE69224359T2/de Publication of WO1993000610A1 publication Critical patent/WO1993000610A1/en Links. Espacenet;
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European Patent Office Office europeen des brevets (12) peen brevets £P 0 546 153 B1 ... (54) SILVER RECOVERY PROCESS Silber-Ruckgewinnungsverfahren ... 5 The instant invention relates to a process for recovering silver from a photographic developer solution. In particular, it relates to a process of contacting a photographic developer ...
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A process for treating a photographic developer solution containing silver ion comprises contacting the solution with a silver recovery element (10), which comprises a substrate (12) having thereon a hydrophilic colloid layer (16) containing physical development nickel. The contacting is carried out for a time sufficient to reduce the silver concentration in the developer …
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WO1993000610A1 - Silver recovery process - Google Patents Silver recovery process Download PDF Info Publication number ... Priority to EP priority patent/EP0546153B1/en Publication of WO1993000610A1 publication Critical patent/WO1993000610A1/en Links. Espacenet;
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recovery process silver recovery silver recovery 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.) ... Publication of AU2589071A publication Critical patent/AU2589071A ...
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Silver-bearing manufactured organic products such as photographic film, photographic paper, printed circuit boards, etc., are loaded into a reduction zone of a retort and pyrolyzed by hot non-oxidizing gases produced by the burning of the carbon residue of previously pyrolyzed organic products in an adjacent oxidation zone in the same retort.
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The disclosure relates to a method for reclaiming silver from photographic substrates and particularly a method wherein silver halide coated substrates, such as plastic film, is subjected to a bleach solution for removing the silver bearing emulsion from the substrates the emulsion it is then placed in a settling tank and subjected to the use of sodium hydroxide and a flocculating …
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Silver is recovered from silver-containing scrap paper (e.g., scrap thermographic office copy paper) by a process which involves conditioning the silver-containing paper (e.g., with hot …
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US5188662A - Silver recovery process - Google Patents Silver recovery process Download PDF Info Publication number ... Priority to US07/724,577 priority Critical patent/US5188662A/en Assigned to EASTMAN KODAK COMPANY A CORP. OF NJ reassignment EASTMAN ...
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A process for treating a photographic developer solution containing silver ion comprises contacting the solution with a sil-ver recovery element (10), which comprises a substrate (12)...
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EP0546153B1 - Silver recovery process - Google Patents Silver recovery process Download PDF Info Publication number EP0546153B1 ... Publication of EP0546153A1 publication Critical patent/EP0546153A1/en Application granted granted Critical
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The disclosure relates to a method for reclaiming silver from photographic substrates and particularly a method wherein silver halide coated substrates, such as plastic film, is subjected …
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The contacting is carried out for a time sufficient to reduce the silver concentration in the developer solution to a desired level. The process is useful for treating a seasoned or …
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US3632336A US3632336DA US3632336A US 3632336 A US3632336 A US 3632336A US 3632336D A US3632336D A US 3632336DA US 3632336 A US3632336 A US 3632336A Authority US United States Prior art keywords silver recovery process temperature film carbon Prior art date Legal status (The legal status is an assumption and is not a legal …
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The disclosure relates to a method for reclaiming silver from photographic substrates and particularly a method wherein silver halide coated substrates, such as plastic film, is subjected to a bleach solution for removing the silver bearing emulsion from the substrates the emulsion it is then placed in a settling tank and subjected to the use of sodium hydroxide and a flocculating …
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This web page summarizes information in PubChem about patent US-4632701-A. This includes chemicals mentioned, as reported by PubChem contributors, as well as other content, such as …
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CA2090468C - Silver recovery process - Google Patents Silver recovery process Info Publication number ... Publication of CA2090468C publication Critical patent/CA2090468C/en Anticipated expiration legal-status Critical Status Expired - Fee Related legal-status Critical Current Links. Espacenet;
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A process for treating a photographic developer solution containing silver ion comprises contacting the solution with a silver recovery element (10), which comprises a substrate (12) having thereon a hydrophilic colloid layer (16) containing physical development nuclei. The contacting is carried out for a time sufficient to reduce the silver concentration in the developer …
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