Process for manufacturing phosphoric acid

Details Process for manufacturing phosphoric acid Process for manufacturing phosphoric acid

1977-11-18

1981-11-03

Carter, Herbert T.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Alkaline earth metal

423320, 423321R, C01F 1146, C01B 2522

Patent

active

042985838

ABSTRACT:
A wet phosphoric acid production process comprising the attack on phosphate rock by sulfuric acid and phosphoric acid utilizing a vacuum cooling and a recirculation of the reaction slurry. The flow rates of the materials within the system are maintained at a level, relative to the rate of withdrawal of the slurry from the system, of between 300% and 4000% for the cyclic flow, between 2000% and 4000% for the vacuum cooling flow and between 500% and 2200% for the local agitation flow. Control of the flow rates according to factors including the rock analysis allows maximization of the yield of H.sub.3 PO.sub.4.

REFERENCES:
patent: 2699985 (1955-01-01), Delruelle
patent: 2950171 (1960-08-01), Macq
patent: 3181931 (1965-05-01), Weber
patent: 3257168 (1966-06-01), Chelminski
patent: 3416889 (1968-12-01), Caldwell
patent: 3472619 (1969-10-01), Chelminski et al.
patent: 3522003 (1970-07-01), Lopker
patent: 3522004 (1970-07-01), Lopker
patent: 4132760 (1979-01-01), Ore et al.
patent: 4140748 (1979-02-01), Ore

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