Chemistry of inorganic compounds – Phosphorus or compound thereof – Oxygen containing
Patent
1987-07-06
1988-10-25
Heller, Gregory A.
Chemistry of inorganic compounds
Phosphorus or compound thereof
Oxygen containing
423321R, C01B 2516
Patent
active
047802952
ABSTRACT:
The invention is a process to purify a solution of phosphoric acid by removing transition metal impurities such as iron, chromium and vanadium. In the process a solution of phosphoric acid in an organic solvent which is substantially immiscible with water is contacted with an aqueous solution of a salt of an alkali metal of phosphoric acid. The phosphoric acid recovered following the contacting contains a substantially lesser content of transition metal impurities.
REFERENCES:
patent: 1968544 (1934-07-01), Vana
patent: 3410656 (1968-11-01), Bunin et al.
patent: 3607029 (1971-09-01), Goret et al.
patent: 3700415 (1972-10-01), Koerner et al.
patent: 3767769 (1973-10-01), Windand et al.
patent: 3872215 (1975-03-01), Cherdron et al.
patent: 3993736 (1976-11-01), Irani
patent: 4018869 (1977-04-01), Beltz et al.
patent: 4207302 (1980-06-01), Smith
patent: 4225568 (1980-09-01), Leveque
patent: 4377562 (1983-03-01), Hiraga et al.
patent: 4394361 (1983-07-01), Berkowitz et al.
patent: 4543239 (1985-09-01), Jacobs
patent: 4556548 (1985-12-01), Gradl et al.
patent: 4596703 (1986-06-01), Gradi et al.
patent: 4640824 (1987-02-01), Schimmel et al.
"Purifying Wet-Process Phosphoric Acid", Phosphorus and Potassium No. 139, Sep.-Oct. 1985, pp. 34-39.
Kirk-Othmer, "Encyclopedia of Chemical Technology", Third Ed., vol. 17, pp. 434-437.
McKetta et al., "Encyclopedia of Chemical Processing and Design", Marcel Dekker, Inc., N.Y. 1984, vol. 21, pp. 84-87.
Brochu David P.
Dore Jeffrey C.
Hall Richard E.
Elden R. E.
FMC Corporation
Heller Gregory A.
Ianno F.
Seems E. G.
LandOfFree
Process for purifying phosphoric acid does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for purifying phosphoric acid, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for purifying phosphoric acid will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2268321