Process for removing impurities from wet process phosphoric...

Details Process for removing impurities from wet process phosphoric... Process for removing impurities from wet process phosphoric...

C - Chemistry, Metallurgy

01

B

71/27, 23/76

C01B 25/238 (2006.01) C01B 25/237 (2006.01) C01B 25/455 (2006.01)

Patent

CA 1208881

ABSTRACT OF THE DISCLOSURE 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/P205 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.

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