Flotation of copper sulfide ores with improved thionocarbamates (US Patent 3975264)

Patent number: 3975264 Granted: 1976-08-17 Filed: 1974-06-26 Inventors: Franklin Anderson Bolth (Baltimore, MD, US); Ronald David Crozier (Bedford, NY, US); Lawrence Evans Strow (Baltimore, MD, US) Assignees: Minerec Corporation (New York, NY, US)

Abstract

High-purity dialkyl thionocarbamates are economically produced by reacting suitable xanthates with alkyl amines in the presence of a dissolved catalyst. Nickel and palladium salts are preferred catalysts. Thionocarbamates produced by the method of