Process for removal of carbon black floc associated with wet-pro

Details Process for removal of carbon black floc associated with wet-pro Process for removal of carbon black floc associated with wet-pro

1982-09-30

1983-12-13

Heller, Gregory A.

Chemistry: fertilizers

Processes and products

Inorganic material

71 34, 423310, 423313, 423321R, C05B 1100, C05B 700, C01B 2516

Patent

active

044203217

ABSTRACT:
Black carbonaceous floc in wet-process phosphoric acid is removed by contact with an oxidizing agent during the neutralization step with ammonia. In an embodiment the black floc is removed in liquid fertilizers derived from wet-process phosphoric acid by reaction with an oxidizing agent at high temperatures.
The oxidizing agent is preferably nitric acid.

REFERENCES:
patent: 2968528 (1961-01-01), Tuttle et al.
patent: 3044855 (1962-07-01), Young
patent: 3988140 (1976-10-01), Burns
Achorn et al., "Commercial Uses of the Pipe Reactor Process for Production of High Polyphosphate Liquids", Solutions, Mar./Apr. 1973, pp. 44, 46, 48, 52.

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