Oxidative control of post precipitation in phosphoric acid

Details Oxidative control of post precipitation in phosphoric acid Oxidative control of post precipitation in phosphoric acid

1980-01-10

1981-07-21

Vertiz, O. R.

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

423317, C01B 2516

Patent

active

042798779

ABSTRACT:
Improvement in the Hill phosphoric acid process. Fe.sup.++ in high iron feed is oxidized to Fe.sup.+++ to improve post-precipitation characteristics, optionally, a minor stream from the crystallizer is returned to the oxidation zone.

REFERENCES:
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patent: 2968528 (1961-01-01), Tuttle et al.
patent: 3206282 (1965-09-01), Crawford et al.
patent: 3310374 (1967-03-01), Posey
patent: 3528771 (1970-09-01), Shearon et al.
patent: 3907680 (1975-09-01), Hill
patent: 4044108 (1977-08-01), Kikuchi et al.
patent: 4048289 (1977-09-01), Pierres
patent: 4110422 (1978-08-01), Hill
patent: 4164550 (1979-08-01), Hill
U.S.S.N. 427,383, 12-21-73, Pierres.

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