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. 01, 2005
Filed:
Aug. 09, 2002
Ryoji Sugise, Ube, JP;
Shuji Tanaka, Ube, JP;
Takashi Doi, Ube, JP;
Masayuki Nishio, Ube, JP;
Sadao Niida, Ube, JP;
Tsunao Matsuura, Ube, JP;
Ryoji Sugise, Ube, JP;
Shuji Tanaka, Ube, JP;
Takashi Doi, Ube, JP;
Masayuki Nishio, Ube, JP;
Sadao Niida, Ube, JP;
Tsunao Matsuura, Ube, JP;
Ube Industries, Ltd., , JP;
EMS-Chemie AG, , CH;
Abstract
In the process for producing a cyclododecanone by isomerizing an epoxycyclododecane-containing starting material in the presence of an isomerization reaction catalyst containing lithium bromide and/or lithium iodide, in order to perform the reaction with high efficiency (high reaction rate) and high selectivity and stably produce a high-purity cyclododecanone in industry while maintaining a high-level reaction rate, the epoxycyclododecane-containing starting material is produced by contacting an epoxycyclododecadiene with hydrogen in the presence of a hydrogen-reduction catalyst and has a content of the hydroxyl group-containing cyclododecane compounds contained in the epoxycyclododecane-containing starting material controlled to 5 mol % or less.