Loading patent…
AssigneeAmerican Cyanamid Company
InventorsSim K. Lim, Richard M. Goodman
Estimating the term…
Low molecular weight compolymers and terpolymers of the general structure: ##STR1## wherein R.sub.1 is hydrogen or a methyl radical, R.sub.2 is hydrogen or COOM and M is a hydrogen, alkali metal cation or ammonium ion, exhibit excellent depressive action in the flotation of non-sulfide mineral ores thereby resulting in improved selectivity and recovery. The low molecular weight copolymers and terpolymers, perform depressing action without resulting in any associated flocculation in the flotation system. These copolymers and terpolymers can be combined with other known depressing agents in nonsulfide ore flotation processes such as starch, dextrin, water soluble gum and the like, to obtain equivalent or improved selectivity and recovery than would be obtained using these depressants alone.
A process for concentrating nonsulfide mineral values in a flotation system which comprises adding to the flotation system, as a selective depressant, an effective amount of a copolymer or a terpolymer or water soluble salts thereof of the general structure:
Dependencies are inferred from the claim text.