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公开(公告)号:US4684512A
公开(公告)日:1987-08-04
申请号:US900192
申请日:1986-08-25
摘要: The invention is a process for recovering phosphorus value from magnesium pyrophosphate containing filter media in the wet superphosphoric acid purification process. The invention comprises treating the filter cake with a salt to remove the adhering phosphoric acid without solubilizing magnesium acid pyrophosphate. The filter cake, after phosphoric acid removal, can be utilized as commercial or technical grade magnesium acid pyrophosphate.
摘要翻译: 本发明是一种在湿法超磷酸纯化方法中从含焦磷酸镁过滤介质中回收磷值的方法。 本发明包括用盐处理滤饼以除去粘附的磷酸而不溶解焦磷酸镁。 磷酸去除后的滤饼可用作商业级或工业级镁酸焦磷酸盐。