The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 08, 2007
Filed:
Mar. 21, 2003
Toshio Yamamoto, Nagoya, JP;
Akihiko Suda, Seto, JP;
Kae Yamamura, Nagoya, JP;
Hideo Sobukawa, Nisshin, JP;
Toshio Yamamoto, Nagoya, JP;
Akihiko Suda, Seto, JP;
Kae Yamamura, Nagoya, JP;
Hideo Sobukawa, Nisshin, JP;
Kabushiki Kaisha Toyota Chuo Kenkyusho, Aichi-gun, JP;
Abstract
A metal oxide which has a large pore volume, and is very useful as a catalyst support. An alkaline material is added to an aqueous solution in which a compound of a metal element for composing an oxide is dissolved, a resultant mixture is co-precipitated, an obtained precipitate is washed, a washed precipitate is stirred in water along with a surfactant, and is calcined. By adding the surfactant after washing, the pH is not changed so that the adding effect of the surfactant is achieved to its upper most limit, thereby obtaining a metal oxide which has a large pore volume and a large mean diameter of secondary particles, and exhibits excellent gas diffusion properties.