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:
Jul. 03, 2012
Filed:
Aug. 18, 2009
Tatsuya Okubo, Tokyo, JP;
Yuki Suzuki, Osaka, JP;
Tsuyoshi Matsushita, Ehime, JP;
Tatsuya Suzuki, Ehime, JP;
Tatsuya Okubo, Tokyo, JP;
Yuki Suzuki, Osaka, JP;
Tsuyoshi Matsushita, Ehime, JP;
Tatsuya Suzuki, Ehime, JP;
Sumitomo Chemical Company, Limited, Tokyo, JP;
The University of Tokyo, Tokyo, JP;
Abstract
The present invention provides a method which can produce ε-caprolactam with a good selectivity by reacting cyclohexanone oxime with a good conversion in a vapor phase Beckmann rearrangement reaction. Disclosed is a method for producing ε-caprolactam, which comprises performing a vapor phase Beckmann rearrangement reaction of cyclohexanone oxime in the presence of a pentasil type zeolite, wherein the pentasil type zeolite is a zeolite obtained by subjecting a mixture containing a silicon compound, water, and a compound represented by formula (I):[(R)N—(CH)—N(R)—(CH)—N(R)]·3/(A)  (I)wherein Rrepresents an alkyl group having 1 to 4 carbon atoms, A represents an n-valent anion, m represents an integer of 5 to 7, and n represents an integer of 1 to 3, to a hydrothermal synthesis reaction.