Process and extractant for removing fluorine compounds from aqueous phosphoric acid
AssigneeYissum Research Development Company of the Hebrew University of Jerusalem
InventorsAvraham M. Baniel, Aharon M. Eyal
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Abstract
The invention provides a process for removing fluorine compounds from aqus 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.
Claims9
A process for selectively extracting fluorine compounds from aqueous phosphoric acid containing the same, said process comprising contacting said phosphoric acid with an extractant comprising phosphoric acid and an oil soluble amine, said phosphoric acid being present in said extractant in an amount of at least 0.25 moles for each mole of amine therein, said amine being substantially water insoluble both in free and in salt form and said extractant being substantially free of fluorine, sulfate and metal impurities.
Dependencies are inferred from the claim text.