Proceso para la preparacion de carbonato de calcio precipitado que comprende proporcionar y calcinar material que comprende carbonato de calcio, b) apagar el producto de reaccion del paso a) con cloruro de amonio, c) separar los componentes insolubles de cloruro de calcio del paso b) d)carbonatar la solucion de cloruro de calcio y separar dicho carbonato del paso d); carbonato de calcio; y su uso.

摘要

The present invention relates to a process for the preparation of precipitated calcium carbonate comprising the steps of a) providing and calcining calcium carbonate comprising material; b) slaking the reaction product obtained from step a) with an aqueous ammonium chloride solution; c) separating insoluble components from the calcium chloride solution obtained from step b); d) carbonating the calcium chloride solution obtained from step c); e) separating the precipitated calcium carbonate obtained from step d); the precipitated calcium carbonate obtained by this process, as well as uses thereof.