Production of urea-ammonium polyphosphates from urea phosphate

Details Production of urea-ammonium polyphosphates from urea phosphate Production of urea-ammonium polyphosphates from urea phosphate

1979-07-13

1980-08-12

Schor, Kenneth M.

Chemistry: fertilizers

Processes and products

Organic material-containing

260555R, 423308, 423312, 423315, C05P 700, C05P 1300

Patent

active

042171288

ABSTRACT:
Crystalline urea phosphate is pyrolyzed in one stage to give molten urea ammonium polyphosphates that contains up to 95 percent of the phosphate as polyphosphate. These are then processed into high-analysis solid or liquid fertilizers. Addition of urea to the process to maintain a urea:biuret ratio of at least 16 prevents precipitation of biuret in the liquid fertilizers.

REFERENCES:
patent: 3382059 (1968-05-01), Getsinger
patent: 3713802 (1973-01-01), Gittenait
Veda; Chem. Abstracts 60: 3098e; Kogyo Kagaku Zasschi 66(5), 586-589 (1963). _

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