METHOD OF PRODUCING HIGH PURITY VATERITE-TYPE SPHERICAL CALCIUM CARBONATE

摘要

PROBLEM TO BE SOLVED: To provide a method of producing vaterite-type spherical calcium carbonate having spherical shape, small particle diameter and high purity.;SOLUTION: In a method of synthesizing the vaterite-type calcium carbonate by carbonating CaCl₂ or Ca(NO₃)₂ in an aqueous solution, in a solid-liquid separating step after reaction, the solid is cleaned with lower alcohol or di-lower alkyl ketone and dried to produce the vaterite-type spherical calcium carbonate having ≥3N purity. The vaterite-type spherical calcium carbonate is also produced by the method.;COPYRIGHT: (C)2011,JPO&INPIT