Title:
PRODUCTION OF ACICULAR BARIUM CARBONATE
Document Type and Number:
Japanese Patent JPH01167216
Kind Code:
A
Abstract:
PURPOSE:To obtain acicular barium carbonate having high purity, by reacting carbon dioxide gas with an aqueous solution of barium hydroxide containing a water-soluble alcohol. CONSTITUTION:Barium carbonate is produced by reacting an aqueous solution or barium hydroxide with carbon dioxide gas in the presence of a water-soluble alcohol in the aqueous solution of barium hydroxide. The concentration of the aqueous solution of barium hydroxide is preferably 20-100g/l in terms of Ba(OH)2.H2O. Any alcohol can be used provided that it is soluble in water and the examples of the alcohol are methanol, ethanol, ethylene glycol and glycerol. The amount of the alcohol is preferably 20-50vol.% based on water. The acicular ratio is increased by increasing the alcohol content. The reaction temperature is preferably 10-30 deg.C.
Inventors:
OBA TAKASHI
Application Number:
JP32614787A
Publication Date:
June 30, 1989
Filing Date:
December 23, 1987
Export Citation:
Assignee:
SAKAI CHEMICAL INDUSTRY CO
International Classes:
C01F11/18; (IPC1-7): C01F11/18
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