Neutral hydrocarboxycarbonyl thionocarbamate sulfide collectors

摘要

New and improved collector compositions for use in froth flotation processes for the beneficiation of mineral values from base metal sulfide ores are disclosed. The collector compositions comprise at least one hydrocarboxycarbonyl thionocarbamate compound selected from compounds of the formula: <IMAGE> wherein R1 and R2 are each, independently, selected from saturated and unsaturated hydrocarbyl radicals, alkyl polyether radicals and aromatic radicals, or such radicals optionally substituted by polar groups selected from halogen, nitrile and nitro groups. The use of the hydrocarboxycarbonyl thionocarbamate collectors provides excellent metallurgical recoveries of sulfide mineral values in froth flotation processes conducted over a broad range of pH conditions including acid, neutral and mildly alkaline pH.