Chemistry of inorganic compounds – Phosphorus or compound thereof – Oxygen containing
Patent
1979-12-28
1981-08-25
Vertiz, O. R.
Chemistry of inorganic compounds
Phosphorus or compound thereof
Oxygen containing
423321R, C01B 2516
Patent
active
042859212
ABSTRACT:
The invention relates to the purification of wet phosphoric acid in which raw, wet acid extracted by means of a solvent, desulfated by means of a calcium ion aqueous solution and regenerated by means of water, is then treated with water vapor or hot gases by which a concentrated solution of phosphoric acid with a ponderal ratio F/P.sub.2 O.sub.5 less than 10 ppm is obtained.
REFERENCES:
patent: 4083937 (1978-04-01), Toshimitsu et al.
patent: 4118462 (1978-10-01), Desire et al.
Bousquet Francois
Helgorsky Jacques
Mamourian Armand
Heller Gregory A.
Rhone-Poulenc Industries
Vertiz O. R.
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