METHOD FOR PRODUCING ANATASE TYPE TITANIUM DIOXIDE AND TITANIUM DIOXIDE COATING MATERIAL

Title:

METHOD FOR PRODUCING ANATASE TYPE TITANIUM DIOXIDE AND TITANIUM DIOXIDE COATING MATERIAL

Document Type and Number:

WIPO Patent Application WO/2000/046153

Kind Code:

A1

Abstract:

A method for producing an anatase type titanium dioxide powder which comprises subjecting a titania sol, a titania gel or a titania sol-gel mixture to a heat treatment and simultaneously to a pressure treatment in a closed vessel, and subsequently drying the resulting product; and a method for producing an anatase type titanium dioxide slurry which comprises subjecting a titania sol, a titania gel or a titania sol-gel mixture to a heat treatment and simultaneously to a pressure treatment in a closed vessel, and subsequently agitating the resulting product to provide a dispersion. This method can be used for producing an anatase type titanium dioxide powder which exhibits high photocatalytic activity and has a large specific surface area, and an anatase type titanium dioxide slurry which has high storage stability and high dispersibility in a process operated at a relatively low temperature and having a small number of steps. A slurry thus obtained can be used as a coating material having photocatalytic activity which can be coated on a material having poor heat resistance.

Inventors:

IMURA TATSUYA (JP)
TERADA SEIJI (JP)

Application Number:

PCT/JP1999/003528

Publication Date:

August 10, 2000

Filing Date:

June 30, 1999

Export Citation:

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Assignee:

KAWASAKI HEAVY IND LTD (JP)
IMURA TATSUYA (JP)
TERADA SEIJI (JP)

International Classes:

B01J21/06; B01J35/00; B01J37/03; B01J37/08; C01G23/053; C01G23/08; (IPC1-7): C01G23/04

Foreign References:

JPH10265223A	1998-10-06
JPH06293519A	1994-10-21
JPS6317221A	1988-01-25
JPS63229139A	1988-09-26
JPH1129759A	1999-02-02
JPS6065708A	1985-04-15

Other References: