Process for the preparation of carbonates by wet-grinding

摘要

In a process for producing natural and/or synthetic carbonates, especially calcium carbonates, having a high specific surface area of more than 20 m<2>/g, preferably from 20 to 50 m<2>/g, according to the BET/N2 method, said process operating by wet-grinding, these carbonates are circulated, i.e. the product leaving the mill is returned to the mill as many times as it takes the end product to reach the desired specific surface area and so that the solids concentration over the entire period of wet grinding is less than or equal to 24% by weight. The products of this process have surprisingly good properties and can be used in the plastics industry, in sealing compounds, in the rubber industry, in printing inks, in cosmetics and pharmaceuticals, in cigarette paper, in wood glazes, in glazed paper and in plastisols.