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US4511463A Process for recovery of phosphate ore 失效
磷矿矿石回收工艺

Process for recovery of phosphate ore
摘要:
Phosphate ore is concentrated by flotation in the presence of a half-ester of an organic dicarboxylic acid, such as maleic acid, with a saturated aliphatic alcohol containing at least 11 carbon atoms. Water and oil also are present. The half-ester may be partly neutralized, e.g. with caustic soda, in an amount at most sufficient to raise the pH to 7.0.
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