Patent ID: 9169126
Filing Date: 2015-10-27
Classification: C01F,C01P,C09C,Y10T

Abstract:
1. A method of producing substantially spherical barium carbonate particles, comprising: (A) mixing, in an aqueous medium, a barium compound with at least one first ingredient selected from the group consisting of gluconic acid, salts of gluconic acid, gluconolactone, glucoheptonic acid, salts of glucoheptonic acid, and glucoheptonolactone, so as to prepare a mixture; and (B) reacting the barium compound with carbon dioxide or a water-soluble carbonate, in the mixture, whereby, without employing a grinding step, the substantially spherical barium carbonate particles are produced, wherein the step (B) is performed in the presence of at least one second ingredient selected from the group consisting of polybasic carboxylic acid, hydroxycarboxylic acid, salts of polybasic carboxylic acid, and salts of hydroxycarboxylic acid, which is present in the mixture in an amount of 0.1 to 5 mol % based on 100 mol % of spherical barium carbonate particles produced.