Chemistry of inorganic compounds – Phosphorus or compound thereof – Oxygen containing
Patent
1987-07-28
1989-05-09
Heller, Gregory A.
Chemistry of inorganic compounds
Phosphorus or compound thereof
Oxygen containing
423167, 423320, C01B 2516
Patent
active
048288110
ABSTRACT:
A process and apparatus for producing phosphoric acid by the recovery of P.sub.2 O.sub.5 from a phosphate ore is disclosed. A slurry of a phosphate ore in an aqueous phosphoric acid solution is formed in each of a plurality of reaction zones connected in series. Phosphate ore is introduced into the first reaction zone and phosphoric acid into the last reaction zone whereby the reaction of the phosphoric acid with the ore forms a slurry of coarse solids, fine solids and monocalcium phosphate in the phosphoric acid solution. A first process stream comprising coarse solids is removed from the first reaction zone and each of the other reaction zones and is transferred to the adjacent, successive reaction zone. A second process stream comprising fine solids is removed from the last reaction zone and the other reaction zones and is transferred into the adjacent, preceding zone in a direction which is countercurrent to the direction of flow of the first process stream and is concurrent with the direction of flow of the phosphoric acid from the last to the first reaction zones. A differential of phosphoric acid concentration is maintained between the reaction zones with the concentration decreasing in each reaction zone in the direction of flow of the first process stream.
REFERENCES:
patent: 3126249 (1964-03-01), Atkin
patent: 3150957 (1964-09-01), Seymour et al.
patent: 3919395 (1975-11-01), Hauge
patent: 4393030 (1983-07-01), Sardisco et al.
patent: 4393032 (1983-07-01), Drechsel et al.
Derdall Gary D.
Erickson William R.
Phinney Robin L.
Wilson James D.
Heller Gregory A.
Potash Corporation of Saskatchewan
LandOfFree
Method for producing phosphoric acid from phosphate ore does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for producing phosphoric acid from phosphate ore, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for producing phosphoric acid from phosphate ore will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-88729