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A method for purification of circulating leaching solutions from phosphates and fluorides 发明申请

2023-04-03 2610 107K 0

专利信息

申请日期 2025-07-10 申请号 US14773749
公开(公告)号 US20160016798A1 公开(公告)日 2016-01-21
公开国别 US 申请人省市代码 全国
申请人 OPENED JOINT STOCK COMPANY "UNITED CHEMICAL COMPANY URALCHEM'
简介 The present invention relates to a method for purification of acidic solutions of salts, in particularly those formed in the course of complex apatite processing yielding rare-earth metal (REM) concentrate from phosphorus, fluorine and alkali metals impurities comprising precipitation of phosphorus and fluorine in the form of calcium phosphates and fluorides and alkali metals in the form of silicofluorides of alkali metals. In some embodiments before the precipitation of calcium phosphates and fluorides and silicofluorides of alkali metals, acid is selectively extracted into an organic extractant, and after the precipitation of calcium phosphates and fluorides and silicofluorides of alkali metals the acid is may be re-extracted from the extractant into an aqueous solution. Methods allow for the removal of phosphorus, fluorine and alkali metals impurities and regeneration of the acid.


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