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:
Jun. 17, 2008
Filed:
Dec. 19, 2002
Hubertus a Smits, Maastricht, NL;
Gerardus WA Hangx, Weert, NL;
Johan T Tinge, Sittard, NL;
Michael S Doelman, Maastricht, NL;
Hubertus A Smits, Maastricht, NL;
Gerardus Wa Hangx, Weert, NL;
Johan T Tinge, Sittard, NL;
Michael S Doelman, Maastricht, NL;
DSM IP Assets B.V., Heerlen, NL;
Abstract
The invention relates to a process to separate butadiene dimers from a mixture comprising butadiene dimers and alkyl-3-pentenoate and/or isomers thereof wherein the butadiene dimers are separated from said mixture by distillation in the presence of an alcohol and in that the distillation is effected at a bottom temperature of between 80 and 200° C. Examples of frequent occurring butadiene dimers are 4-vinylcyclohexene and 1,3,7-octatriene. Examples of the alcohol are monohydroxy aliphatic alcohols.