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:
Mar. 09, 2004
Filed:
Jun. 11, 2002
Applicant:
Inventors:
Myunghun Kim, Seoul, KR;
Sunjin Kim, Seoul, KR;
Youngsun Uh, Kyonggi-Do, KR;
Younghee Kim, Seoul, KR;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01J 2/320 ;
U.S. Cl.
CPC ...
B01J 2/320 ;
Abstract
The present invention relates to porous catalysts comprising layered silicate and metal oxides, and a method of preparing &egr;-caprolactam from cyclohexanone oxime using the catalyst. This new catalyst can resolve the environmental and safety problems arising from conventional liquid acid process. Also the present catalyst solves the problem of short lifetime of current solid acid catalysts. Moreover, the present catalyst provides higher selectivity and yield.