Batch production of suspension fertilizers using lignosulfonate

Details Batch production of suspension fertilizers using lignosulfonate Batch production of suspension fertilizers using lignosulfonate

1988-11-07

1990-06-12

Lander, Ferris H.

Chemistry: fertilizers

Processes and products

Inorganic material

71 34, 71 43, 71 41, 71 6408, 423317, 423305, C05B 700

Patent

active

049329936

ABSTRACT:
In the production of suspension fertilizers the addition of an additive comprising lignosulfonate to the wet-process acid prior to the ammoniation step prevents severe thickening of the suspension during its formation, which severe thickening is normally associated with in situ mass crystallization of monoammonium phosphate and which mass crystallization results in (1) the total prevention of further ammoniation of said acid or, at the very least, extremely slow further ammoniation thereof, and/or (2) excessive ammonia losses. Also, addition of said lignosulfonate to the acid prevents the formation of metallic impurity gel-like compounds which cause extremely high viscosities, nonpourability, and complete destruction of fluidity.

REFERENCES:
patent: 3408162 (1968-10-01), Sutterwhite et al.
patent: 4601891 (1986-07-01), McGill et al.
patent: 4846871 (1989-07-01), Detroit

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