Method for defluorinating wet process phosphoric acid

Details Method for defluorinating wet process phosphoric acid Method for defluorinating wet process phosphoric acid

1990-05-11

1991-03-26

Heller, Gregory A.

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

423320, C01B 2516

Patent

active

050027441

ABSTRACT:
A method for defluorinating wet process phosphoric acid. Phosphatic waste clay from phosphate rock beneficiation is mixed with the wet process phosphoric acid. The mixture is heated for a time sufficient to remove fluorine from the acid as gaseous silicon tetrafluoride. Phosphate is liberated from the phosphatic waste clay and thus is recovered in the defluorinated wet process phosphoric acid.

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