PROCEDIMENTO PER IL RECUPERO DI METALLI PREZIOSI

摘要

Precious metals are recovered from bimetallic materials by treating a leach liquor filtrate with a carboxylic acid type ion exchange resin to form a waste liquor stream substantially free of base metal values. The ion exchange resin is regenerated by passing through it an aqueous leaching liquid comprising an ammonium salt in an ammoniacal solution. The resulting aqueous regenerating liquid then containing base metal values can be used in the process for recovering precious metals.