Pressure reactor for producing diammonium phosphate

Details Pressure reactor for producing diammonium phosphate Pressure reactor for producing diammonium phosphate

1986-03-24

1986-10-28

Lander, Ferris H.

Chemistry: fertilizers

Processes and products

Inorganic material

71 43, 71 6406, C05B 700

Patent

active

046196846

ABSTRACT:
Process for producing diammonium phosphate (DAP) fertilizer from phosphoric and sulfuric acids, anhydrous ammonia, and water in a specially designed reactor operated at high pressures to granulate diammonium phosphate at low recycle ratios and with relatively small fossil fuel requirement drying per ton of product. Previously operated reactors employed pressures ranging from 0 to 10 psig pressures. This reactor operates at 40 to 80 psig. The process substantially increases production in existing DAP granulation plants and has helped reduce grade deficiencies. Also, use of this reactor for DAP production results in about the same levels of ammonia loss to the scrubber as the prior-art tank preneutralizer, higher operating factors, less maintenance and no transfer pump plugging. Operation is at a temperature of 300.degree. or more .degree.F., while the tank preneutralizer operates normally at 240.degree. F.

REFERENCES:
patent: T101203 (1981-11-01), Parker et al.
patent: 3730700 (1973-05-01), Groenveld

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