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:
Jan. 02, 2001
Filed:
May. 06, 1999
Misao Yagi, Hiratsuka, JP;
Keisuke Itakura, Hiratsuka, JP;
Kenichi Yamamoto, Hiratsuka, JP;
Akira Amano, Hiratsuka, JP;
Takasago International Corporation, Tokyo, JP;
Abstract
Disclosed is a process for producing 5-cyclohexadecen-1-one continuously from 1,2-divinylcyclododecanol in a short time in an efficient manner without side reactions. In the process, 1,2-divinylcyclododecanol as a starting material is supplied from a raw material container,by a dosage pump,to a flash unit,which is set under a vacuum of 5 mm Hg or less by a vacuum pump,and is heated. 1,2-Divinylcyclododecanol which is flashed in the flash unit is supplied to a reactor,which is heated to 400 to 650° C. and is set under a vacuum of 5 mm Hg or less whereby 1,2-divinylcyclododecanol is converted into 5-cyclohexadecen-1-one. The reaction product is discharged from the top of the reactor and is cooled to recover the objective 5-cyclohexadecen-1-one in the recovery container,. The reduction in the pressure of the apparatus is preferably performed by a vacuum pump,via a hydrochloric acid trap,comprising, for example, sodium methylate/methanol cooled to −78 to −100° C.