Fine particulate titanium dioxide, and production process and use thereof
AssigneeShowa Denko K.K.
InventorsHisao KOGOI, Susumu Kayama, Jun Tanaka
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Abstract
A process for producing a fine particulate titanium dioxide, comprising charging a fine particulate titanium dioxide powder in a resin bag, spraying water droplets having a liquid droplet diameter of 5 to 500 μm to the powder in the bag, and closing the bag for storing the powder in the bag.
Claims12
A process for producing a fine particulate titanium dioxide, comprising:
- a first step of high-temperature oxidizing a titanium tetrachloride-containing gas with use of an oxidative gas to produce a titanium dioxide powder,
- a second step of contacting water vapor with the titanium dioxide powder while rolling the powder in a heating furnace, thereby effecting dechlorination and at the same time, increasing the adsorbed water,
- a third step of packaging the obtained powder in a resin bag, during which water droplets having a liquid droplet diameter of 5 to 500 μm are sprayed to the powder in the bag, and then closing the bag, and
- a fourth step of storing the powder in the bag.
A process for producing a fine particulate titanium dioxide, comprising charging a fine particulate titanium dioxide powder in a resin bag, spraying water droplets having a liquid droplet diameter of 5 to 500 μm to the powder in the bag, and closing the bag for storing the powder in the bag.
Dependencies are inferred from the claim text.