RU2000123379A - METHOD FOR EXTRACTION OF NOBLE METALS - Google Patents

Claims (2)

1. The method of extraction of precious metals from spent catalysts, concentrates and other materials with an inorganic base, including leaching in the electrolyte, circulation of the electrolyte in a closed loop through filling, the deposition of metals in the electrolyzer and the subsequent separation of the noble metal from the cathode by known methods, characterized in that the processed material in the form of filling is placed in the interelectrode space of the electrolyzer, electrochemical leaching of noble metals on the basis of their anode distribution rutting is activated by pretreating the material by reversing the electrodes in statics, which turns it into a bulk multipolar electrode that provides anodic dissolution of the metal in the entire volume of the material, and then the electrolyte is circulated through the backfill from the anode to the cathode at a rate determined from the condition that the hydrated anionic chloride complexes of noble metals formed during leaching in the volume of the backfill, which is controlled at the beginning of the process by the formation of ode brown clouds.  2. The method according to p. 1, characterized in that acidified water with a hydrochloric acid content of 0.3-4.0% is used as the electrolyte.