Abstract: This invention is directed to a process for the production of a variety of esters, particularly acrylate and methacrylate-based esters, by a transesterification reaction. This objective is achieved by reaction of an ester of a carboxylic or a carbonic acid, in particular of a saturated or unsaturated, typically, a 3 to 4 carbon atom carboxylic acid; with an alcohol in the presence of a catalyst comprising the combination of a metal 1,3-dicarbonyl complex (pref. Zn or Fe acetylacetonate) and a salt, in particular an inorganic salt, pref. ZnCl2, LiCI, NaCI, NH4CI or Lil. These catalysts are prepared from readily available starting materials within the reaction medium without the need for isolation (in-situ preparation).
Type:
Grant
Filed:
June 10, 2011
Date of Patent:
October 21, 2014
Assignee:
Ecosynth bvba
Inventors:
Thomas Peter Anne Goossens, Freek Annie Camiel Vrielynck, Noel Gabriel Cornelius Hosten, Koen Jeanne Alfons Van Aken
Abstract: This invention is directed to a general catalyst of high activity and selectivity for the production of a variety of esters, particularly acrylate and methacrylate-based esters, by a transesterification reaction. This objective is achieved by reaction of an ester of a carboxylic or a carbonic acid, in particular of a saturated or unsaturated, typically, a 3 to 4 carbon atom carboxylic acid; with an alcohol in the presence of a catalyst comprising the combination of a metal 1,3-dicarbonyl complex (pref. Zn or Fe acetylacetonate) and a salt, in particular an inorganic salt, pref. ZnCl2, LiCI, NaCI, NH4CI or Lil. These catalysts are prepared from readily available starting materials within the reaction medium without the need for isolation (in-situ preparation).
Type:
Application
Filed:
June 10, 2011
Publication date:
April 11, 2013
Applicant:
ECOSYNTH BVBA
Inventors:
Thomas Peter Anne Goossens, Freek Annie Camiel Vrielynck, Noel Gabriel Cornelius Hosten, Koen Jeanne Alfons Van Aken