Classifying – separating – and assorting solids – Fluid suspension – Liquid
Patent
1984-08-17
1985-12-03
Nozick, Bernard
Classifying, separating, and assorting solids
Fluid suspension
Liquid
75 2, 252 61, 560148, B03D 114
Patent
active
045564833
ABSTRACT:
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 thiourea compound selected from compounds of the formula: ##STR1## wherein R.sup.1 is hydrogen or R.sup.2 ; R.sup.2 is selected from saturated and unsaturated hydrocarbyl radicals, hydrocarboxy radicals and aromatic radicals; and R.sup.3 is selected from saturated and unsaturated hydrocarbyl radicals, alkyl polyether radicals and aromatic radicals, said R.sup.2 and R.sup.3 radicals, optionally, and independently, being substituted by polar groups selected from halogen, nitrile and nitro groups. The use of the hydrocarboxycarbonyl thiourea collectors provides excellent metallurgical recoveries of sulfide mineral values in froth flotation processes conducted over a very broad range of pH including acid, neutral and mildly alkaline pH.
REFERENCES:
patent: 3780089 (1973-12-01), Blecher et al.
patent: 3959331 (1976-05-01), Fuchs et al.
patent: 4005217 (1977-01-01), Berg et al.
patent: 4341626 (1982-07-01), Dauplaise et al.
patent: 4387034 (1983-06-01), Unger et al.
CA 74(15) 76202r.
CA 80(13) 70756b.
CA 71(13) 60989e.
Fu Yun-Lung
Wang Samuel S.
American Cyanamid Company
Nozick Bernard
Van Riet Frank M.
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