Controlled release agricultural products and processes for...

C - Chemistry – Metallurgy – 05 – D

Patent

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Details

C05D 9/02 (2006.01) A01N 25/12 (2006.01) C05G 3/00 (2006.01)

Patent

CA 2383712

A controlled release agricultural absorbent based product inluding particles of an absorbent material containing capillaries/voids between 10-200 microns in cross-sectional diameter which is impregnated in an amount of 40-95 % of the capillaries/voids volume with an agriculturally beneficial material selected from the grou pconsisting of ertilizers, insecticides, herbicides and fungicides, being produced by a process including steps of: 1) introducing water to particles of absorbent material to result in absorpotion of water within the absorbent material; 2) heating the absorbent particles and water to transform the water within the absorbent particles to stream; 3) introducing the heated absorbent particles to an agriculturally beneficial material in aqueous solution to essentially saturate the absorbent particles with the agriculturally beneficial material; 4) granulating the combination of agriculturally beneficial material and saturated absorbent particles to solidify and harden the mixture, resulting in the agglomeration of absorbent particles into granules; and 5) drying the granules.

L'invention concerne un produit à base d'un absorbant agricole à libération régulée qui comprend des particules d'une matière absorbante contenant des capillaires/des vides de 10-200 microns de diamètre transversal, imprégnée à 40-95 % du volume des capillaires/vides d'une matière bénéfique sur le plan agricole sélectionnée dans le groupe constitué par des fertilisants, des insecticides, des herbicides et des fongicides. Le produit est fabriqué selon un procédé qui consiste 1) à introduire de l'eau à des particules de matière absorbante pour entraîner l'absorption de l'eau dans la matière absorbante, 2) à à chauffer les particules absorbantes et l'eau pour transformer en vapeur l'eau dans les particules absorbantes, 3) à introduire les particules absorbantes chauffées dans une matière bénéfique sur le plan agricole dans une solution aqueuse pour saturer les particules absorbantes de ladite matière, 4) à mettre en granules l'association de ladite matière et des particules absorbantes saturées pour solidifier et durcir le mélange, ce qui conduit à l'agglomération de particules absorbantes en granules, et 5) à sécher les granules.

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