Chemistry of inorganic compounds – Phosphorus or compound thereof – Oxygen containing
Patent
1977-08-25
1980-11-25
Langel, Wayne A.
Chemistry of inorganic compounds
Phosphorus or compound thereof
Oxygen containing
423319, 423321R, C01B 2516
Patent
active
042358540
ABSTRACT:
A method for removing impurities from wet process produced phosphoric acid and recovering phosphate values retained by the impurities is disclosed. The wet process produced phosphoric acid is filtered through a diatomite filter cake in a porous medium at a temperature from about 57.degree. C. to about 77.degree. C. During filtering an impurity-containing upper portion of the filter cake is removed exposing a fresh surface of the filter cake. An aqueous slurry is formed with the removed portion of filter cake. The slurry is filtered to recover a filtrate containing a major portion of the phosphate values retained by the removed portion of the filter cake.
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Atwood Wesley W.
Myrick John S.
Smith Hudson C.
Bisson Barry A.
Langel Wayne A.
Occidental Petroleum Corp.
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