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:
May. 29, 2018
Filed:
Jul. 17, 2017
Evonik Degussa Gmbh, Essen, DE;
Kaiwu Dong, Bo Zhou, CN;
Ralf Jackstell, Cuxhaven Altenwalde, DE;
Matthias Beller, Ostseebad Nienhagen, DE;
Dirk Fridag, Haltern am See, DE;
Dieter Hess, Marl, DE;
Katrin Marie Dyballa, Recklinghausen, DE;
Frank Geilen, Haltern am See, DE;
Robert Franke, Marl, DE;
EVONIK DEGUSSA GMBH, Essen, DE;
Abstract
The invention relates to a method for preparing di- or tricarboxylic esters by alkoxycarbonylation of dienes having conjugated double bonds. The method includes the steps of initially charging a diene having two conjugated double bonds, adding a phosphine ligand according to formula (I) and a catalyst precursor, adding an alcohol, feeding in CO, and heating the reaction mixture with conversion of the diene to a di- or tricarboxylic ester.