BARIUM CARBONATE PRODUCTION METHOD

The present invention provides a method for economically producing fine barium carbonate having a specific surface area of larger than 45 m2/g with little burden on the environment. The present invention relates to a method for producing barium carbonate, including:(a) adding citric acid and/or a salt thereof to at least one barium compound selected from the group consisting of barium hydroxide, barium chloride, barium nitrate, barium acetate, or barium oxide;(b) reacting with carbon dioxide and/or a carbonate compound; and(c) adding at least one selected from a polybasic carboxylic acid, an acid anhydride thereof, or a salt thereof, the polybasic carboxylic acid being represented by the following formula (1): HOOC-X-(COOH)n (1)wherein X is a divalent or trivalent linking group, the linking group being a C1 or C2 saturated hydrocarbon group, a C2 unsaturated hydrocarbon group, or a group derived from a benzene ring, each optionally containing a hydroxy group as a substituent; and n is 1 or 2,a mol% A of the added (a) citric acid and/or a salt thereof and a mol% B of the added (c) at least one selected from a polybasic carboxylic acid represented by the formula (1), an acid anhydride thereof, or a salt thereof, each relative to 100 mol% of barium atoms in the barium compound, satisfying the following expressions (I) and (II): 6.0≤A+B≤160.01≤A/B≤7.0