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. 11, 2016
Filed:
Aug. 26, 2014
Stichting Dienst Landbouwkundig Onderzoek, Wageningen, NL;
Jerome Emile Lucien Le Notre, Arnhem, NL;
Elinor Lindsey Scott, Amersfoort, NL;
Roeland Leo Croes, Nijmegen, NL;
Jacobus Van Haveren, Ede, NL;
Stichting Dienst Landbouwkundig Onderzoek, Wageningen, NL;
Abstract
Disclosed is a method of making methacrylic acid, or a carboxylic derivative thereof, from itaconic acid, isomers, or precursors thereof. A starting material comprising an acid selected from the group consisting of itaconic acid, citraconic acid, mesaconic acid, citric acid, aconitic acid, isocitric acid and mixtures thereof, is subjected to contact with 0.1 eq. to 3.0 eq. of a base, at a temperature of 150° C. to 350° C., under the influence of a transition metal-containing heterogeneous catalyst. A better yield at lower temperatures is achieved.