Production of high-analysis ammonium orthophosphate suspension f

Details Production of high-analysis ammonium orthophosphate suspension f Production of high-analysis ammonium orthophosphate suspension f

1984-02-27

1985-04-16

Lander, Ferris H.

Chemistry: fertilizers

Processes and products

Inorganic material

71 36, 71 43, 71 6408, 423313, C05B 700

Patent

active

045113882

ABSTRACT:
An improved process for the production of highly concentrated (N-P.sub.2 O.sub.5) suspension fertilizers effected by the ammoniation of wet-process or other impure orthophosphoric acids in batch-type equipment. The underlying concept which goes to the gist of the instant invention involves the use of a heel of product from a previously prepared batch to provide nuclei and a suitable environment for the conversion of the metallic impurities therein into crystalline habits rather than the usual highly undesirable form of metallic impurity gel-like compounds, which gels cause extremely high viscosities, nonpourability, and complete destruction of fluidity in concentrated ammonium phosphate suspension fertilizers prepared by prior-art procedure. Also, during the ammoniation of acids by the instant process, the heel maintained therein prevents severe thickening due to mass crystallization of monoammonium phosphate, which severe thickening normally results in either/or extremely slow further ammoniation and excessive ammonia losses. Practice of this method is simple, economical, versatile, and performed in readily available equipment.

REFERENCES:
patent: 3949058 (1976-04-01), Young et al.
patent: 4397675 (1983-08-01), Young
patent: 4427432 (1984-01-01), Mann, Jr. et al.
patent: 4445926 (1984-05-01), Mills et al.

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