Patent ID: 8524192

Claim:
A method of producing an aluminum hydroxide gel particle, comprising the steps of: (1) adding a chelating agent to a soluble aluminum salt aqueous solution to obtain a soluble aluminum salt aqueous solution containing a complex; (2) reacting an aqueous solution of an alkali metal carbonate or an ammonium carbonate with the soluble aluminum salt aqueous solution containing the complex in a molar ratio (CO 3 /Al 2 O 3 ) of the carbonate ion contained in the carbonate to aluminum oxide contained in the soluble aluminum salt of 3.0 to 4.5 at a temperature of 10 to 40° C. to obtain a reaction product; (3) carrying out solid-liquid separation of the reaction product to obtain a cake; (4) bringing the cake into contact with an aqueous solution of at least one ion exchange agent selected from the group consisting of an inorganic acid and a water-soluble aluminum salt to obtain an ion-exchanged cake; and (5) drying the ion-exchanged cake.