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:
Oct. 28, 2008
Filed:
Mar. 24, 2004
Osamu Yamada, Tokyo, JP;
Manabu Kusano, Kamisu, JP;
Nobuo Takayanagi, Kamisu, JP;
Hideki Arimoto, Tainai, JP;
Osamu Yamada, Tokyo, JP;
Manabu Kusano, Kamisu, JP;
Nobuo Takayanagi, Kamisu, JP;
Hideki Arimoto, Tainai, JP;
Kuraray Co., Ltd., Kurashiki-shi, JP;
Abstract
A process for producing isoprene is provided, which includes continuously or intermittently supplying isobutylene and/or t-butanol, formaldehyde and water into an acidic aqueous solution, and reacting the reaction mixture while distilling away a mixture containing produced isoprene, water, unreacted starting materials and other low boiling point components from this reaction mixture to the outside of the reaction system, wherein the reaction is carried out while controlling the concentration of high boiling point byproducts, which is produced and accumulated in the reaction mixture, to fall within the range of 0.5-40 mass %.