Process for production of phosphoric acid from dry matrix by SO.

Details Process for production of phosphoric acid from dry matrix by SO. Process for production of phosphoric acid from dry matrix by SO.

1984-12-24

1987-12-22

Heller, Gregory A.

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

423320, 423321S, C01B 2516

Patent

active

047146001

ABSTRACT:
Phosphoric acid is produced from dry phosphate ore, matrix by acidulation with sulfur trioxide in the presence of sulfuric acid catalyst to form polyphosphoric acid, treatment with sufficient water to convert the polyphosphoric acid to orthophosphoric acid and extraction with water or organic solvent such as a lower alcohol, particularly methanol or ethanol.

REFERENCES:
patent: 1251741 (1918-01-01), Blumenberg
patent: 3391996 (1968-07-01), Van Dijk et al.
patent: 3410654 (1968-11-01), Wiesboeck et al.
patent: 3886259 (1975-05-01), Nikolai et al.
patent: 4154800 (1979-05-01), Cannon et al.
patent: 4501724 (1985-02-01), Goers
Ross, Reactions of Sulfur Oxides with Phosphate Rock, 1966, pp. 29, 30.

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