N-aminoethylpiperazine condensates for beneficiation of phosphate ore
AssigneeThe Dow Chemical Company
InventorRobert E. Hefner, Jr.
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Abstract
In the beneficiation of phosphate ore by the flotation of siliceous material, the utilization of a condensate of N-aminoethylpiperazine with a fatty acid or fatty acid ester improves the separation of phosphate from silica. This improvement is especially great in the presence of a co-collector consisting of a polyethylenepolyamine condensed with a fatty acid.
Claims5
In a process for beneficiating a siliceous phosphate ore by froth flotation with a collector system for the flotation of siliceous matter, the improvement wherein the collector system comprises an effective amount of a condensate or an acid salt of a condensate of a tall oil fatty acid or tall oil fatty acid ester with (1) a polyethylenepolyamine corresponding to the formula H.sub.2 N--C.sub.2 H.sub.4 NH--.sub.x C.sub.2 H.sub.4 --NH.sub.2, wherein x is an integer of from 4 to 11 and (2) a N-aminoethylpiperazine, said collector system comprising at least about 5 weight percent N-aminoethylpiperazine.
Dependencies are inferred from the claim text.