Production process for ultrafine particulate complex oxide containing titanium oxide
AssigneeShowa Denko K.K.
InventorsJun Tanaka, Shinichiro Tomikawa
Life of this patent
Estimating the term…
Abstract
The present invention provides a process for producing ultrafine particulate complex oxide containing titanium oxide, including vapor-phase producing a complex oxide containing titanium oxide having a BET specific surface area of about 5 to about 200 m2/g, where a starting material gas containing titanium tetrachloride and an oxidizing gas are preheated to about 700° C. or more, and are reacted with a solution or a slurry of a salt containing a metallic element. The present invention also provides an ultrafine particulate complex oxide containing titanium oxide obtained by the process, and use of the oxide.
Claims21
A process for producing an ultrafine particulate complex oxide containing titanium oxide, comprising vapor-phase producing a complex oxide containing itanium oxide having a BET specific surface of about 5 to about 200 m2/g, wherein a starting material gas containing titanium tetrachloride and an oxidizing gas are preheated to about 700° C. or more, and reacted with a solution or a slurry of a salt containing a metallic element, and wherein the reaction is performed by feeding the starting material gas containing titanium tetrachloride and the oxidizing gas to a reaction tube each at a flow rate of about 10 m/sec or more.
An ultrafine particulate complex oxide containing titanium oxide, which is an ultrafine particulate complex oxide having a BET specific surface of about 5 to about 200 m2/g, and is in a mixed crystal state of allowing a bond of —Ti—O-metallic element- to be present within a primary particle, and wherein a decrease in the percentage of the BET specific surface area after heating at 700° C. for 1 hour is about 20% or less.
Dependencies are inferred from the claim text.