Phosphoric acid process with high circulation rates

Details Phosphoric acid process with high circulation rates Phosphoric acid process with high circulation rates

1978-05-26

1981-07-07

Carter, Herbert T.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Alkaline earth metal

423319, 423320, C01F 1146, C01B 2522

Patent

active

042774489

ABSTRACT:
Phosphoric acid is prepared from phosphate rock and sulfuric acid by using a reaction train comprising a dissolving slurry and a crystallization slurry maintained at different sulfate levels. Both inter and intra vessel circulation are used at high rates to minimize reagent concentration gradients and temperature gradients and provide a suitable crystallization environment. Preferably, the intra vessel circulation is substantially in plug flow, as through a draft tube.

REFERENCES:
patent: 1836672 (1931-12-01), Larsson
patent: 2968544 (1961-01-01), Zeitz et al.
patent: 3257168 (1966-06-01), Chelminski
patent: 3416889 (1968-12-01), Caldwell
patent: 3418077 (1968-12-01), Robinson
patent: 3453076 (1969-07-01), Long et al.
patent: 3522003 (1970-07-01), Lopker
patent: 3522004 (1970-07-01), Lopker
patent: 3690826 (1972-09-01), Husken
patent: 3939248 (1976-02-01), Caldwell
patent: 4059674 (1977-11-01), Lopker

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