Methods for the Recovery of Platinum, Iridium, Palladium, Gold, and Silver from Jewelers' Waste |
Common terms and phrases
acid is added alloy or alloys ammonium chloride ammonium hydroxide base metals beaker boiling borax glass CHEMICAL chloric acid clear solution contain platinum copper sulphate cupel decantation dilute aqua regia dilute nitric acid dish distilled water explained in method ferrous sulphate filter and washed filter paper finely divided foreign matter Formic acid free from platinum free from silver free or alloyed given in method granulated heated hydrochloric acid INQUARTATION leave the platinum melted with borax metallic platinum metals are present method g mixed with dirt moistened with hydrochloric palladium plati platinum and iridium platinum free platinum metals portions of dilute poured prepared by dissolving procedure given quantity ratio of silver rough separation sand bath shown in method silver and base silver chloride silver to gold silver to platinum sodium carbonate sodium chloride stannous chloride sulphuric acid temperature tested treated by methods washed with hot water bath zinc amalgam