METHOD TO PROCESS ANTIMONY-BASED NOBLE METALS Russian patent published in 2009 - IPC C22B11/00 C22B3/10 C22B3/46 

FIELD: process engineering.

SUBSTANCE: invention relates to process engineering and can be used for processing antimony-based alloys containing noble metals in concentrations over 0.1%. Proposed method comprises dissolving alloys in solution containing acid and extracting noble metals from said solution by cementing. Prior to dissolving alloys, lead is remove therefrom by processing with solvent. Alloys are dissolved by solution containing hydrochloric acid and hydrogen dioxide or sodium persulphate. Noble metals are cemented by antimony-based alloys with minor concentration of noble metals or cathode antimony powder with grain size varying from 100 to 74 mcm, or by gold-antimony flotation concentrate with grain size varying from 100 to 74 mcm to produce an alloy enriched with noble metals cements noble metals. Now, noble metals are extracted from obtained products.

EFFECT: treatment of alloys with wide range of noble metal concentrations within 0,1 to 1,3 %.

4 cl, 2 tbl, 5 ex