C - Chemistry – Metallurgy – 05 – G
Patent
C - Chemistry, Metallurgy
05
G
71/1, 71/40
C05G 3/00 (2006.01) A01N 25/00 (2006.01) A01N 25/08 (2006.01)
Patent
CA 1049284
ABSTRACT OF THE DISCLOSURE Dust diluents and carriers of the gypsum series are prepared in granular or powder form, with absorbing properties, for use in pesticides and leaf and soil fertilizing products, from minerals of the gypsum series, particularly hydrated sulphates of selenite, sericulite, alabaster or anhydrous sulphate form, or the anhydrite form. The calcium sulfate is backed in order to produce baked, Alpha, Beta, or hydraulic gypsum according to the baking temperature; it is deactivated and water is added to form a dispersion which is allowed to settle. A substance is added which may be a salt of an alkaline or alkaline-earth metal, or double aluminum and potassium sul- phate, a source of electrons, an oxygen or nitrogen donor, a non-ionic, anionic, cationic surface active agent or mixtures thereof, a vegetable polymer, a polymerized vegetable gum, a polymerized vegetable oil, polyvinyl chloride or acetate in natural condition or emulsified, a specific setting retarder, a tannic derivative, a ligninsulphite or a ligninsulphonate of alkaline or earth-alkaline metal or of an amphoteric metal, or a specific synthetic plasticizing product for plastic or polymer- izable materials or for rubber mixtures. The products have little or no acidic centres, no surface catalytic activity nor cationic exchange capacity.
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