Process for partial removing of impurities from a wet process ph

Details Process for partial removing of impurities from a wet process ph Process for partial removing of impurities from a wet process ph

1982-10-01

1985-01-15

Hruskoci, Peter

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

71 34, 71 43, 210787, 210805, 423313, 423321R, C01B 2528, C02B 700

Patent

active

044938209

ABSTRACT:
A process for the partial removal of impurities present in a wet process phosphoric acid used in the production of granulated mono- or di-ammonium phosphate fertilizers in order to control the grade of the final product. All or a portion of the liquid from the primary scrubbers is clarified to remove the precipitated impurities and the clarified flow is then fed into the reactor along with any unclarified portions of the primary scrubber liquid.

REFERENCES:
patent: 2142406 (1959-01-01), Nonhebel et al.
patent: 3677734 (1972-07-01), Carroll et al.
patent: 3988140 (1976-10-01), Burns et al.
patent: 4028087 (1977-06-01), Schultz et al.
patent: 4102657 (1978-07-01), Mehta
patent: 4154593 (1979-05-01), Brown et al.
patent: 4343780 (1982-08-01), Wolstein et al.

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