Frother composition and a froth flotation process for the...

Details Frother composition and a froth flotation process for the... Frother composition and a froth flotation process for the...

B - Operations, Transporting

03

D

361/2, 361/27

B03D 1/02 (2006.01) B03D 1/008 (2006.01)

Patent

CA 1270075

ABSTRACT A frother composition and a process for recover- ing coal from raw coal by subjecting the raw coal, in the form of an aqueous pulp, to a flotation process, wherein the frother composition comprises the reaction product of 1) a polyhydroxy alkane having from 1 to 20 carbon atoms or a polyhydroxy cycloalkane having from 3 to 20 carbon atoms and 2) propylene oxide, or a mixture of propylene oxide and ethylene oxide, with the proviso that at least 50 mole percent of the mixture is propylene oxide, and the reaction product has a molecular weight of from 150 to 1400. The process is particularly effective in the selective recovery of fine particle size coal of a size of less than about 90 mirometer.

489539

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