C - Chemistry – Metallurgy – 01 – F
Patent
C - Chemistry, Metallurgy
01
F
C01F 11/18 (2006.01)
Patent
CA 2368174
A product and a process for the preparation of discrete calcium carbonate particles that result from preparing an aqueous calcium carbonate slurry containing carbohydrates, carbonating the aqueous calcium carbonate slurry while maintaining the selected starting carbonation temperature. The product of the present invention is discrete particles of calcium carbonate which are especially useful in paints, plastics, paper coating, paper filling, and because of the purity level of the calcium carbonate particle may be used in cosmetics, pharmaceuticals and food applications.
L'invention concerne un produit et un procédé de préparation de particules distinctes de carbonate de calcium consistant à préparer une suspension aqueuse de carbonate de calcium contenant des hydrates de carbones, à carbonater la suspension aqueuse de carbonate de calcium tout en maintenant la température de carbonatation sélectionnée au départ. Le produit de cette invention se compose de particules distinctes de carbonate de calcium qui sont spécialement indiquées pour les peintures, les plastics, le couchage de papier, la charge de papier. Grâce au niveau de pureté de la particule de carbonate de calcium, l'invention trouve une application dans les domaines cosmétique, pharmaceutique et alimentaire.
Deutsch Donald Richard
Wise Kenneth James
Marks & Clerk
Minerals Technologies Inc.
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