Chemistry: fertilizers – Processes and products – Inorganic material
Patent
1980-12-05
1983-08-16
Lander, Ferris H.
Chemistry: fertilizers
Processes and products
Inorganic material
71 51, 71 53, 71 6406, 71 6413, C05B 1900, C05C 102, C05D 102
Patent
active
043989365
ABSTRACT:
Storage-stable nitrogen-phosphorous-potassium fertilizer granules and prills are made by adding to a molten or aqueous solution mixture of ammonium nitrate and ammonium phosphate, a particulate potassium salt, typically potassium chloride, in which the particles have an average size no greater than 55 microns and less than 1% by weight of the particles are larger than 150 microns. The potassium salt is added without the need for preheating and at a temperature of between 5.degree. and 40.degree. C. to the mixture where it is simultaneously converted. The resulting mixture is granulated or prilled into NPK fertilizer particles.
REFERENCES:
patent: 3002831 (1961-10-01), Gross et al.
patent: 3032408 (1962-05-01), Baumann
patent: 3301658 (1967-01-01), Arthur et al.
patent: 3384471 (1968-05-01), Monks et al.
patent: 3617237 (1971-11-01), Nagasawa et al.
Sauchelli, Man. on Fert. Manuf., 1973, Industry Publ., Inc., Caldwell, N.J., pp. 239, 241, 276.
Margolis et al., Prod. of Complex Fert., 1970, Israel Prog. for Sci. Trans. Ltd., IPST Cat. No. 5760, pp. 32, 33.
Hoogendonk Johan W.
Lucassen Servatius J.
Lander Ferris H.
Unie Van Kunstmestfabrieken, B.V.
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