Method for the wet process manufacture of phosphoric acid

Details Method for the wet process manufacture of phosphoric acid Method for the wet process manufacture of phosphoric acid

1984-02-01

1985-02-26

Heller, Gregory A.

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

423167, C01B 2516

Patent

active

045017247

ABSTRACT:
An improved method for the wet process manufacture of concentrated phosphoric acid is disclosed herein. A mixture of gaseous sulfur trioxide and sulfuric acid now replaces concentrated sulfuric acid as a process reactant which results in a higher heat of reaction and the ability to evaporate out of the reaction slurry increased inputs of water. With this method the increased inputs of water, either from undried phosphate rock, wet grinding of phosphate rock, use of dilute sulfuric acid, or from other sources will not interfere with associated high P.sub.2 O.sub.5 yields, lower concentrations of filtrate phosphoric acid and/or unbalance the zero steam requirements.

REFERENCES:
patent: 3003852 (1961-10-01), Nordengren
patent: 3030200 (1962-04-01), Harris
patent: 3161467 (1964-12-01), Hignett et al.
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patent: 3801566 (1974-04-01), Elmendorp et al.
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patent: 3886259 (1975-05-01), Nikolai et al.
patent: 4154800 (1979-05-01), Cannon et al.
patent: 4258008 (1981-03-01), Gragg

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