Process of removing cationic impurities from wet process phospho

Details Process of removing cationic impurities from wet process phospho Process of removing cationic impurities from wet process phospho

1985-12-16

1987-01-27

Heller, Gregory A.

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

423158, 423317, 423465, C01B 2516

Patent

active

046393595

ABSTRACT:
A method of removing aluminum, magnesium, iron and other impurities from wet process phosphoric acid is provided. The method comprises partially ammoniating the acid and reacting the acid with a fluoride ion donating compound to precipitate aluminum- and magnesium-containing ralstonite and ammonium fluorosilicate which can be easily separated from the acid thereby producing a partially ammoniated wet process phosphoric acid of reduced impurities content.

REFERENCES:
patent: 3642439 (1972-02-01), Moore et al.
patent: 4136199 (1979-01-01), Mills
patent: 4288804 (1981-11-01), Parks et al.
patent: 4435372 (1984-03-01), Frazier et al.
patent: 4493820 (1985-01-01), Clausen
patent: 4500502 (1985-02-01), McDonald et al.
patent: 4554144 (1985-11-01), Ore
Fertilizer Manual, International Fertilizer Development Center, United Nations Industrial Development Organization, Dec. 1979, pp. 191-193.

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