Process for preparing liquid fertilizers

Details Process for preparing liquid fertilizers Process for preparing liquid fertilizers

1973-07-27

1976-02-17

Hart, Charles N.

Chemistry: fertilizers

Processes and products

Inorganic material

71 43, 423305, C05B 700, C01B 2526

Patent

active

039389820

ABSTRACT:
Improved stable suspension liquid fertilizers based on ammonia and phosphoric acid obtained by the wet method, and combining both a high content of fertilizing elements and a long storage life are prepared by ammoniating the phosphoric acid with gaseous ammonia in two steps at a temperature of from 90.degree.C to 120.degree.C until a pH of between 6 and 8 is attained, rapidly cooling the resulting ammonium phosphate suspension to a temperature of from 0.degree.C to 35.degree.C, and during the cooling adding a suspending agent to the suspension while maintaining the suspension under stirring.

REFERENCES:
patent: 2792286 (1957-05-01), Wordie et al.
patent: 3109729 (1963-11-01), Slack et al.
patent: 3113858 (1963-12-01), Slack et al.
patent: 3179496 (1965-04-01), Skinner et al.
patent: 3199973 (1965-08-01), Moore
patent: 3264087 (1966-08-01), Slack et al.
patent: 3382059 (1968-05-01), Getsizer
patent: 3813233 (1974-05-01), Kendrick, Jr.

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