Process for preparing pure phosphoric acid

Details Process for preparing pure phosphoric acid Process for preparing pure phosphoric acid

1976-12-14

1978-04-11

Vertiz, O. R.

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

423321S, 423341, C01B 2516

Patent

active

040839370

ABSTRACT:
In a process for preparing a pure phosphoric acid whereby phosphate rock is treated with sulfuric acid or hydrochloric acid to prepare a crude phosphoric acid, and wherein said crude acid is solvent extracted with an organic solvent to prepare an extracted aqueous phosphoric acid solution which is then concentrated, the improvement which comprises adding a fluorine compound to said extracted aqueous phosphoric acid solution, and concentrating the mixture under a reduced pressure and thereafter, contacting the concentrated phosphoric acid solution with steam or hot air.

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Slack--Phosphoric Acid-- pp. 610-612 -- pp. 696-699 -- pp. 711-714.

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