Classifying – separating – and assorting solids – Fluid suspension – Liquid
Patent
1984-08-29
1988-08-02
Nozick, Bernard
Classifying, separating, and assorting solids
Fluid suspension
Liquid
252 61, B03D 114
Patent
active
047612231
ABSTRACT:
The invention is a process for recovering coal from raw coal which comprises subjecting the raw coal in the form of an aqueous pulp, to a flotation process in the presence of a flotation collector, and a flotating amount of a flotation frother which comprises the reaction product of a polyhydroxy C.sub.1-20 alkane or polyhydroxy C.sub.3-20 cycloalkane and 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 between about 150 and 1400, under conditions such that the coal is recovered.
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Gaylord, N. G., Polyethers Interscience, publishers Division of John Wiley & Sons, pp. 225-230, 11/26/63.
Hansen Robert D.
Klimpel Richard R.
Nozick Bernard
The Dow Chemical Company
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