Simplified batch clarification of liquid ammonium polyphosphate

Details Simplified batch clarification of liquid ammonium polyphosphate Simplified batch clarification of liquid ammonium polyphosphate

1979-05-07

1981-01-20

Vertiz, O. R.

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

423321S, 71 43, C01B 1516, C01B 2526, C01B 2516

Patent

active

042462487

ABSTRACT:
Particulate carbonaceous matter in ammonium polyphosphate liquid made from impure wet-process phosphoric acid is removed batchwise by intimately mixing the liquid with a combination of selected organic flocculating agents and then allowing the mixture to separate. The particulate carbonaceous matter floats and the clarified liquid is withdrawn from the bottom of the separation vessel. The particulate carbonaceous matter, a minor portion of the input ammonium polyphosphate liquid, and the flocculating agents are intimately remixed with fresh black ammonium polyphosphate liquid to allow reuse of flocculant not combined with the original particulate carbonaceous material. The flocculants may be reused as many as five times. The particulate carbonaceous matter, the inactive flocculant, and a minor portion of the input ammonium polyphosphate liquid are then processed into fluid or solid fertilizers. In some instances, more flocculant is added to the mixing vessel.

REFERENCES:
patent: 3630711 (1971-12-01), Burkirt et al.
patent: 3969483 (1976-07-01), Stinson et al.
patent: 4157911 (1979-06-01), Murphy et al.

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