Gypsum dust diluents for use in pesticides and fertilizing produ

Drug – bio-affecting and body treating compositions – Antigen – epitope – or other immunospecific immunoeffector – Recombinant or stably-transformed bacterium encoding one or...

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71DIG1, 424 78, A01N 900

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active

040483371

ABSTRACT:
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 baked in order to produce baked, Alpha, Beta, or hydraulic chalk, 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 sulphate, 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 polymerizable materials or for rubber mixtures. The products have little or no acidic centers, no surface catalytic activity nor cationic exchange capacity.

REFERENCES:
patent: 3062637 (1962-11-01), Marples et al.
patent: 3553321 (1971-01-01), Zilli et al.
patent: 3832468 (1974-08-01), Hyson et al.
Abstract of Japanese Pat. No. 46-20518 (1971).
Abstract of Japanese Pat. No. 47-1798 (1972).

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