| abstract |
A method for the production of natural and/or synthetic carbonates, and more particularly calcium carbonates, with a high BET/N2 specific surface area of over 20 m2/g, and more particularly of between 20 to 50 m2/g, utilizes an inherently known mill such as an agitating ball mill. The carbonates in an aqueous suspension are wet ground and the entire suspension is recirculated; that is, subjected to additional wet grinding, until the final product has the desired specific surface area. Furthermore, the solids concentration during the entire duration of the wet grinding operation is maintained at no more than 24% by weight. The products of the method have surprisingly valuable properties and can be employed in the plastics industry, in sealants, in the rubber industry, in printing inks, in cosmetics, in pharmaceuticals, in cigarette paper, in wood varnishes, in high gloss paper and in plastisols. |