Process for the preparation of a granular npk fertilizer and...

Details Process for the preparation of a granular npk fertilizer and... Process for the preparation of a granular npk fertilizer and...

C - Chemistry, Metallurgy

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B

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C05B 19/00 (2006.01) C05B 7/00 (2006.01) C05G 1/00 (2006.01)

Patent

CA 1120282

ABSTRACT OF THE DISCLOSURE Storage-stable nitrogen-phosphorous-potas- sium fertilizer granules and prills are made by adding to a mixture of ammonium nitrate and ammonium phos- phate, small granules of 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 mic- -ons. The potassium salt is added without the need for preheating and at a temperature of between 5 and 40°C. to the mixture where it is simultaneously con- verted. The resulting mixture is granulated or pril- led into NPK fertilizer particles.

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