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:
Feb. 12, 2008
Filed:
Feb. 07, 2006
Laurent Zuber, Winterthur, CH;
Oliver Bailer, Winterthur, CH;
Stefan Sander, Winterthur, CH;
Heinz Meierhofer, Rickenbach, CH;
Laurent Zuber, Winterthur, CH;
Oliver Bailer, Winterthur, CH;
Stefan Sander, Winterthur, CH;
Heinz Meierhofer, Rickenbach, CH;
Sulzer Chemtech AG, Winterthur, CH;
Abstract
Carboxylic acid ester is produced by esterification of carboxylic acid and an alcohol in a catalytic reaction zone of a first column at a pressure not greater than ambient pressure. The resultant sump product is distilled in a reaction zone of a second column at a pressure greater than 1.5 bar to obtain a second liquid sump product containing carboxylic acid ester with an carboxylic acid content of less than 100 ppm by weight at a lower end of the column. Neutralization of the second liquid sump product with a base is not required.