Promoters for froth flotation of coal
AssigneeSherex Chemical Company, Inc.
InventorRobert O. Keys
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Abstract
Disclosed is an improved process wherein coal particles are beneficiated by froth flotation under coal froth flotation conditions to separate the desired coal particles from remaining unwanted ash and like gangue material. The improvement of the present invention comprises conducting the froth flotation in the presence of an effective proportion of a promoter which is at least C.sub.10 aliphatic carboxylic acid or an aliphatic ester thereof which is devoid of nitrogen atoms; the hydroxylated, oxidized, or alkoxylated derivative of said acid or ester promoters; and mixtures thereof.
Claims16
In a froth flotation process wherein solid coal particles are selectively separated under coal froth flotation conditions as the froth phase from remaining solid feed ash particles as an aqueous phase in the presence of a coal particle collector and a frother, the improvement characterized by the addition of an effective proportion of a hydrophobic, non-ionic promoter comprising a C.sub.10 -C.sub.30 fatty acid;
- an aliphatic ester of said fatty acid wherein when said aliphatic ester is an alkoxylated derivative, said derivative is a C.sub.3 or higher alkoxylated derivative of said fatty acid;
- and mixtures thereof, said promoter being devoid of nitrogen atoms.
In a froth flotation process wherein solid coal particles are selectively separated under coal flotation conditions as a froth phase from remaining solid feed ash particles as an aqueous phase in the presence of a fuel oil collector and a frothing alcohol, the improvement characterized by the addition of an effective proportion of a hydrophobic, non-ionic promoter comprising a C.sub.12 -C.sub.22 fatty acid, a C.sub.1 -C.sub.30 aliphatic ester thereof, or mixtures thereof.
Dependencies are inferred from the claim text.