Process for removing impurities from wet process of phosphoric a

Details Process for removing impurities from wet process of phosphoric a Process for removing impurities from wet process of phosphoric a

1983-06-28

1985-02-19

Heller, Gregory A.

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

423310, 423317, 71 43, C01B 2516

Patent

active

045005028

ABSTRACT:
A method of preparing a purified ammoniated phosphoric acid composition, comprising, reacting an aqueous wet process phosphoric acid with an ammonium ion source at a N/P.sub.2 O.sub.5 weight ratio ranging from about 0.06 to about 0.15 in the presence of solid phase metal ion containing impurities for a time sufficient to precipitate the majority of the impurities in the acid, the impurity precipitation comprising at least several complex metal salts at least one of which contains magnesium, aluminum and fluorine, and obtaining the purified ammoniated phosphoric acid by separating the precipitated impurities therefrom.

REFERENCES:
patent: 3328123 (1967-06-01), Parks et al.
patent: 3554728 (1971-01-01), Moore et al.
patent: 3632329 (1972-01-01), Tillman et al.
patent: 3975178 (1976-08-01), McCullough et al.

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