Title: Method for recovering trace Ag in waste developing and printing liquid of film
Application Number: 89104616 Application Date: 1989.07.11
Publication Number: 1048733 Publication Date: 1991.01.23
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: C25C1/20,C25C7/00,C25C7/02
Applicant(s) Name: Beijing Normal Univ. Address:
Inventor(s) Name:
Attorney & Agent: MA SIYU
Abstract:
     This invention relates to an improvement of recovering trace Ag from waste developing and printing liquor of film. The electrolysis with large-area electrode is still used. Multiple carbon rods is used to increase the surface area of electrode as micropore electrode is easily blocked by high molecular compound. By proper selection of electrode's surface area and the control of cathode potential, the Ag can be educed compactly at the surface of cathode. The pure commercial Ag can be digested by anode after continuous electrolysis for one or more years. It features simple operation and low cost.
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