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:
Nov. 11, 2014
Filed:
Mar. 07, 2008
Nicolaas Anthony DE Munck, Barendrecht, NL;
Brady Compton, Baton Rouge, LA (US);
John Lyford, Iv, Baton Rouge, LA (US);
Aad Gerrit Oskam, Rozenburg ZH, NL;
Nicolaas Anthony De Munck, Barendrecht, NL;
Brady Compton, Baton Rouge, LA (US);
John Lyford, IV, Baton Rouge, LA (US);
Aad Gerrit Oskam, Rozenburg ZH, NL;
ExxonMobil Chemical Patents Inc., Houston, TX (US);
Abstract
A process for producing esters comprises esterifying an acid or anhydride with an excess of an alcohol to produce a crude ester, recovering excess alcohol from the crude ester and recycling recovered excess alcohol to the esterification reaction together with fresh alcohol. The process is improved by controlling the ratio of the amount of recycled alcohol and the amount of fresh alcohol in dependence on the level of impurities in the recycle alcohol. Further improvements come from feed forwarding fresh alcohol analysis results and from preheating the alcohol before loading into the reactor. Preferably, ester product quality is improved by stripping the alcohol for oxygen removal prior to esterification.