Conditioner for flotation of oxidized coal

Claim 1

A froth flotation process for the beneficiation of coal which comprises floating coal particles of flotation size in a frothing aqueous medium in the presence of a fuel oil collector and an effective amount of a condensation product of a fatty acid or fatty acid ester and a compound represented by the formula I ##STR4## wherein x is a whole number from 1 to 4; each y is independently 2 or 3; R at each occurrence is independently hydrogen or ##STR5## with the proviso that at least one R is not hydrogen, and wherein each T is independently hydrogen, methyl or ethyl; said condensation product being prepared in a molar ratio of at least about one mole of fatty acid or ester for each mole of the compound of formula I and said condensation product being employed in its free form or as an acid derivative with the proviso that a significant percentage of the compounds in the condensation product bear amide moieties.