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:
Aug. 06, 2002
Filed:
May. 25, 2000
Hironobu Maeno, Sodegaura, JP;
Hiroto Matsumoto, Tokyo, JP;
Idemitsu Kosan Co., Ltd., Tokyo, JP;
Abstract
A ruthenium-on-alumina catalyst including at least a ruthenium component carried by a porous &agr;-alumina material. The catalyst has a specific surface area (S ) of 7-50 m /g, and a ratio S /S of the specific surface area of the ruthenium-on-alumina catalyst (S ) to the surface area of the porous &agr;-alumina material (S ) of 3-50. The catalyst has a micropore structure having a pore diameter distribution profile in which at least one peak falls within the range of 5-1,000 angstroms. The catalyst of the invention has excellent crushing strength, and high activity per unit ruthenium weight. Moreover, the catalyst has remarkable heat resistance, maintaining its high activity even at high temperatures of reaction and firing.