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. 17, 2011
Filed:
Jan. 15, 2002
Shinichi Inoue, Yokohama, JP;
Hidehiko Kudou, Yokohama, JP;
Akihiro Mutou, Zushi, JP;
Tateo Ono, Kawasaki, JP;
Toshiji Makabe, Atsugi, JP;
Toru Takatsuka, Kawasaki, JP;
Hisashi Nomura, Yokohama, JP;
Shinichi Inoue, Yokohama, JP;
Hidehiko Kudou, Yokohama, JP;
Akihiro Mutou, Zushi, JP;
Tateo Ono, Kawasaki, JP;
Toshiji Makabe, Atsugi, JP;
Toru Takatsuka, Kawasaki, JP;
Hisashi Nomura, Yokohama, JP;
Chiyoda Corporation, Yokohama-shi, JP;
Abstract
This invention relates to a 4 group metal oxide and to a method for preparation thereof and the 4 group metal oxide prepared by adding a particle growth inhibiter to a hydrosol a hydrogel or a dried product of a hydrous 4 group metal oxide represented by MO(OH)(wherein M denotes a 4 group metal and x is a number greater than 0.1 or x>0.1) followed by drying and calcining has a specific surface area of 80 m/g or more, a pore volume of 0.2 ml/g or more and a pore sharpness degree of 50% or more and excellent heat stability and is useful for a catalyst or a catalyst carrier in which a catalyst metal is dispersed to a high degree. This invention further relates to a porous 4 group metal oxide and to a method for preparation thereof and the 4 group metal oxide prepared by application of a pH swing operation is characterized by a large specific surface area, excellent heat stability, high dispersion of a catalyst metal and a controlled and sharp pore distribution and is useful for a catalyst or a catalyst carrier of excellent reaction selectivity.