SUBSTANTIALLY SPHERICAL BARIUM CARBONATE AND METHOD FOR PRODUCING SUBSTANTIALLY SPHERICAL BARIUM CARBONATE

摘要

PROBLEM TO BE SOLVED: To provide a method for producing barium carbonate particles having desired properties such as high purity, fineness and a spherical shape.SOLUTION: There is provided a method for producing a substantially spherical barium carbonate, the method comprising: (A) mixing a barium compound with at least one first component selected from the group consisting of gluconic acid or a salt thereof, gluconolactone, glucoheptonic acid or a salt thereof and glucoheptonolactone in an aqueous medium to prepare a mixture; and (B) reacting the barium compound with carbon dioxide or a water-soluble carbonate in the resulting mixture to obtain a substantially spherical barium carbonate, wherein at least one of the step (A) and the step (B) is carried out in the presence of at least one second component selected from the group consisting of a polybasic carboxylic acid, a hydroxycarboxylic acid and a salt of the polybasic carboxylic acid or the hydroxycarboxylic acid.