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:
Dec. 10, 1991
Filed:
Mar. 07, 1990
Applicant:
Inventors:
Shinkichi Shimizu, Hyogo, JP;
Takayasu Niwa, Osaka, JP;
Nobuyuki Abe, Nara, JP;
Masanori Doba, Osaka, JP;
Akira Iguchi, Kyoto, JP;
Hiroshi Ichihashi, Osaka, JP;
Masaru Kitamura, Osaka, JP;
Assignee:
Sumitomo Chemical Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01J / ; B01J / ; C07D / ; C07D / ;
U.S. Cl.
CPC ...
502 38 ; 208120 ; 208135 ; 502 33 ; 502 41 ; 540536 ; 546348 ;
Abstract
Carbonaceous materials deposited on solid catalysts and produced, for example, in Beckmann rearrangement in a gaseous phase are burned off by effecting the treatment in the presence of alcohols such as methanol or ethanol together with molecular oxygen-containing gas in order to regenerate the catalyst activity.