Pretreatment of crude wet process phosphoric acid

Details Pretreatment of crude wet process phosphoric acid Pretreatment of crude wet process phosphoric acid

1980-01-22

1983-01-18

Thomas, Earl C.

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

423321S, C01B 2516

Patent

active

043691692

ABSTRACT:
Crude wet process phosphoric acid is pretreated, to ensure against impurity precipitation and objectionable coloration during the downstream processing, e.g., liquid-liquid extraction thereof, by first homogeneously admixing same with an impurity adsorbent, next mixing the liquid dispersion which results with a liquid suspension of a flocculating agent, maintaining the resulting admixture under nonshearing agitation until same separates into a flocculated phase and a liquid solution phase, and then separating therefrom the flocculated phase and a purified, product acid liquid solution phase.

REFERENCES:
patent: T971006 (1978-06-01), Smith
patent: 2936888 (1960-05-01), Williams
patent: 2968528 (1961-01-01), Tuttle et al.
patent: 3099622 (1963-07-01), Woerther
patent: 4256570 (1981-03-01), Allen et al.

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