Kawasaki Jukogyo Kabushiki Kaisha

Jushitsuyu Taisaku Gijutsu Kenkyu Kumiai

Seiji Terada

Kazuhiko Ogawa

Tatsuya Imura

Tadaaki Orihashi

Masao Hayashitani

Tsugio Miyagawa

Hiroshi Tsuji

Hideo Isozaki

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.

Processes for producing anatase titanium oxide and titanium oxide coating material

An extraction residue obtained by solvent deasphalting of a residual oil is mixed with a carrier gas and thermally cracked at a temperature of 400.degree. C. to 600.degree. C. in a tube-type cracking apparatus to obtain cracked oil and pitch. The use of the carrier gas, which may be either an inert gas such as nitrogen or a reactive gas such as hydrogen, permits a flow velocity through the cracking apparatus sufficient to substantially prevent coking. Preferably, the cracking conditions are controlled so that the yield of cracked oil is not more than about 30 to 35%.

Process for thermal cracking of residual oils

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Kobe, Japan

Seiji Terada