| 摘要 |
In the beneficiation of phosphate ore by the flotation of the siliceous material, the utilization of a condensate of a polyethylene polyamine, having from 10 to 24 carbon atoms, with a fatty acid, fatty acid ester or a fatty acid and an alkylolamine improves the separation of phosphate from silica. This improvement is especially great in the presence of unreacted fatty acid. Moreover, this condensate is more readily dispersed in the flotation medium than the condensate of diethylenetriamine with fatty acid employed by the prior art.
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