Kadomiumuganjuhaikibutsukaranokadomiumunosentakutekikaishuho

摘要

1475863 Recovery of cadmium values NIFE JUNGNER AB 28 Jan 1976 [28 Jan 1975] 03262/76 Heading C1A A cadmium-bearing waste (e.g. battery scrap) is leached with an aqueous ammoniacal carbonate solution, metal values other than cadmium (and cobalt if present) are removed by solvent extraction, and cadmium carbonate is precipitated from the remaining solution by expulsion of ammonia from the solution; continued expulsion of ammonia and carbon dioxide from the residual solution precipitates cobalt as carbonate or hydroxide. If cobalt is present it is preferably oxidized in the leach solution by passage of air, prior to the solvent extraction. Nickel in the leach solution is extracted by using for the solvent extraction a solution of a suitable reagent such as a hydroxyoxime or hydroxyquinoline; nickel may be recovered from the organic solution by extraction with sulphuric acid.