Generally spherical barium carbonate particles, and method for producing generally spherical barium carbonate particles
AssigneeSakai Chemical Industry Co., Ltd.
InventorsYusuke Shimizu, Hiroyuki Izumikawa
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Abstract
The present invention has an object to provide a method for producing particulate barium carbonate having desired properties such as high purity, fineness, and has a spherical shape. The present invention relates to a method of producing substantially spherical barium carbonate, including (A) mixing, in an aqueous medium, a barium compound with at least one first ingredient selected from the group consisting of gluconic acid or salts thereof, gluconolactone, glucoheptonic acid or salts thereof, and glucoheptonolactone, to prepare a mixture; and (B) reacting the barium compound with carbon dioxide or a water-soluble carbonate in the mixture, to produce substantially spherical barium carbonate.
Claims9
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.
Dependencies are inferred from the claim text.