Low molecular weight copolymers and terpolymers as depressants i

Details Low molecular weight copolymers and terpolymers as depressants i Low molecular weight copolymers and terpolymers as depressants i

1981-09-14

1982-11-23

Yudkoff, Norman

Classifying, separating, and assorting solids

Fluid suspension

Liquid

209 5, 252 61, 526304, 210735, B03D 114

Patent

active

043604250

ABSTRACT:
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.

REFERENCES:
patent: 3256140 (1966-06-01), Poschmann
patent: 3421893 (1969-01-01), Taylor
patent: 4289613 (1981-09-01), Goodman et al.

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