Reduction of magnesium and other cations in phosphoric acid

Details Reduction of magnesium and other cations in phosphoric acid Reduction of magnesium and other cations in phosphoric acid

1979-03-12

1980-12-30

Cintins, Ivars C.

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

210665, 210666, 210669, 210678, 210687, 210777, B01D 1504

Patent

active

042421985

ABSTRACT:
Improvement in the reduction of Mg, Ca, Na, K and Al in crude phosphoric acid using an ion exchange resin bed, comprising preclarifying the feed acid with flocculant polymer and placing a filter aid precoat on the resin bed. As part of the preclarification process, a compatible soluble sodium compound, such as sodium carbonate, is added to the feed acid to speed the flocculation process.

REFERENCES:
patent: 2773830 (1956-12-01), Farmer et al.
patent: 2968528 (1961-01-01), Tuttle et al.
patent: 3192013 (1965-06-01), Young
patent: 3492092 (1970-01-01), Higgins
patent: 3764655 (1973-10-01), Ehlers et al.
patent: 3907680 (1975-09-01), Hill

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