Reducing settling rate of post-precipitate in fertilizer solutio

Details Reducing settling rate of post-precipitate in fertilizer solutio Reducing settling rate of post-precipitate in fertilizer solutio

1976-09-20

1977-12-20

Spear, Jr., Frank A.

Chemistry: fertilizers

Processes and products

Inorganic material

71 39, 71 43, 252351, C05B 700

Patent

active

040639207

ABSTRACT:
Precipitate settling in ammonium polyphosphate liquid fertilizer solutions containing magnesium, iron, aluminum compound impurities, prepared by concentrating and ammoniating wet process orthophosphoric acid, is impeded by addition to the ammonium polyphosphate, prior to precipitate formation, a source of Cl.sup.- in amounts sufficient to alter the morphology of the precipitate crystals such that the length-to-width ratio of the crystals formed is increased by at least 200%, as compared to the ratio for crystals formed in the absence of Cl.sup.- addition. Since there is little propensity for the longer and thinner crystals to settle out of solution, the crystals remain innocuously suspended in the solution.

REFERENCES:
patent: 3711268 (1973-01-01), Frazier
patent: 3861897 (1975-01-01), Frazier
patent: 3918952 (1975-11-01), Neumiller

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