Removal of fluorine from wet process phosphoric acid by...

Details Removal of fluorine from wet process phosphoric acid by... Removal of fluorine from wet process phosphoric acid by...

C - Chemistry, Metallurgy

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C01B 25/18 (2006.01) C01B 25/26 (2006.01) C01B 25/28 (2006.01) C01B 25/30 (2006.01) C01B 25/40 (2006.01)

Patent

CA 1071835

Abstract of the Disclosure A method for removing fluoride ions form phosphoric acid by neutralizing said acid to a pH between about 5 and about 9, contacting the neutral salt solution thereby formed with an insoluble alkaline earth metal phosphate salt, and lowering the pH to convert the solution back to a purified acid.

258480

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