Imidazoline conditioner for the flotation of oxidized coal

Details Imidazoline conditioner for the flotation of oxidized coal Imidazoline conditioner for the flotation of oxidized coal

1981-11-13

1984-05-22

Nozick, Bernard

Classifying, separating, and assorting solids

Precedent preparation of items or materials to facilitate...

Sorting special items or sorting by methods and apparatus...

209166, 209167, 252 61, B03B 100

Patent

active

044500700

ABSTRACT:
Froth flotation of oxidized coal in the presence of certain imidazoline or imidazolinium salts improves both the selectivity and recovery attained. Imidazolines found particularly efficacious are those bearing a fatty alkyl group in the 2- position and an N-aminoethyl or N-hydroxyethyl group. Preferred imidazolinium salts are those corresponding to the following formula: ##STR1## wherein R is a C.sub.6 to C.sub.22 alkyl or alkenyl group.

REFERENCES:
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patent: 4110207 (1978-08-01), Wang et al.
patent: 4222862 (1980-09-01), Finch
patent: 4278533 (1981-07-01), Hefner
patent: 4342648 (1982-08-01), Biss et al.
P. S. Belov et al., Abhanlungen Akademie der Wissenschaften der DDR, vol. 1, No. 4, pp. 225-233 (1976).

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