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. 01, 2003
Filed:
Apr. 02, 2001
Katsutsugu Kitada, Kanagawa, JP;
Hiroaki Suzuki, Kanagawa, JP;
Tanaka Kikinzoku Kogyo K.K., Tokyo, JP;
Abstract
The present invention provides a process for producing cyclopentadiene or a derivative thereof by heating a mixture containing at least one of dicyclopentadiene or a derivative thereof, the process comprising: a first step comprising heating the mixture into vapor; a second step comprising maintaining while heating the vapor at a temperature higher than the boiling point of the desired cyclopentadiene or derivative thereof to condense and remove high-boiling components and simultaneously collect residual vapor; and a third step comprising maintaining while heating the collected vapor at a temperature lower than the boiling point of the desired cyclopentadiene or derivative thereof to condense and collect the cyclopentadiene or derivative thereof. In the third step, the vapor may be contact with nitrogen gas to improve the yield of the cyclopentadiene or derivative thereof.