Fertilizer product with sustained action and process therefor

Details Fertilizer product with sustained action and process therefor Fertilizer product with sustained action and process therefor

1983-05-17

1985-01-15

Williams, Howard S.

Chemistry: fertilizers

Processes and products

Inorganic material

71 6407, 71 6411, 42721332, C05D 900, C05D 902

Patent

active

044937253

ABSTRACT:
A fertilizer product in granular form with sustained action is provided by spraying a silicate-based solution on the surface of the fertilizer granules in a conventional coating machine which is maintained at temperatures ranging from 20.degree. to 100.degree. C. The coating solution comprises 1 to 50% by weight of a silicate and/or silicic acid ester based on the weight of the fertilizer material to be treated, 0.001 to 1.0 part by weight of a metal and/or non-aqueous metallic compound (first additives), 0.001 to 1.0 part by weight of an aqueous metallic compound (second additives), 0.001 to 1.0 part by weight of an inorganic mineral (third additives), and optionally high molecular weight organic compound, wherein all parts described above are based on the weight of the silicate and/or silicic acid ester used. The coated fertilizer granules are subject to heat-treatment for 10 seconds to 10 days under conditions that the relative humidity and the temperature be maintained at 5 to 95% and 10.degree. to 250.degree. C., respectively.

REFERENCES:
patent: 2731340 (1956-01-01), Seifert
patent: 3137565 (1964-06-01), Hayes
patent: 4321078 (1982-03-01), Michaud

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