Pipe reactor-continuous ammoniator process for production of gra

Details Pipe reactor-continuous ammoniator process for production of gra Pipe reactor-continuous ammoniator process for production of gra

1975-05-16

1976-10-12

Hart, Charles N.

Chemistry: fertilizers

Processes and products

Inorganic material

71 43, 71 64DB, 423309, 423310, 159 45R, C05B 700, B01D 116

Patent

active

039855384

ABSTRACT:
Process for the production of granular mixed fertilizer in which ammonium phosphate melt is prepared in a pipe reactor and dispersed through a plurality of apertures in the wall of the pipe to bind small particles of fertilizer materials into granules. Wet-process phosphoric acid is ammoniated to an NH.sub.3 :H.sub.3 PO.sub.4 mole ratio of about 1.0 and the steam formed by the heat of reaction atomizes the ammonium phosphate melt resulting in proper distribution of the melt for granulation. Up to about 30 percent of the P.sub.2 O.sub.5 in the melt may be polyphosphate. The ammonium phosphate is essentially anhydrous and the granules of mixed fertilizers do not require drying. Elimination of drying greatly decreases investment, dust and fume evolution, and fuel requirement.

REFERENCES:
patent: 2424205 (1947-07-01), Otto
patent: 2829710 (1958-04-01), Paasch
patent: 2902342 (1959-09-01), Kerley, Jr.
patent: 3649175 (1972-03-01), Legol, Jr.

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