Process and extractant for removing fluorine compounds from aqueous phosphoric acid

摘要

The invention provides a process for removing fluorine compounds from aqueuos phosphoric acid containing the same, which process comprises contacting the phosphoric acid with a water insoluble extractant comprising phosphoric acid and an oil soluble amine, the amine being substantially water insoluble both in free and in salt form and the extractant being substantially free of fluorine, sulfate and metal impurities. The invention also provides an extractant for use in the above process comprising an oil soluble amine, which amine is substantially water insoluble both in free and in salt form and a phosphoric acid.