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. 09, 2010
Filed:
May. 19, 2009
Larry E. Brammer, Jr., Kingsport, TN (US);
Barbara E. Fair, Lisle, IL (US);
Cheng-sung Huang, Naperville, IL (US);
Linh Quach, Arlington Heights, IL (US);
Peter E. Reed, Plainfield, IL (US);
Leonard M. Ver Vers, Downers Grove, IL (US);
Larry E. Brammer, Jr., Kingsport, TN (US);
Barbara E. Fair, Lisle, IL (US);
Cheng-Sung Huang, Naperville, IL (US);
Linh Quach, Arlington Heights, IL (US);
Peter E. Reed, Plainfield, IL (US);
Leonard M. Ver Vers, Downers Grove, IL (US);
Nalco Company, Naperville, IL (US);
Abstract
A method and apparatus for preparing a N,N-dialkylaminoalkyl acrylate in a continuous transesterification reaction. The reaction involves adding alkyl acrylates such as methacrylate or ethacrylate to a reboiler mechanism and efficiently removing alcohol co-products. Because the reaction is continuous, the alkyl acrylates can be added as needed to increase output, decrease output, or fine-tune the reaction dynamics. An entrainer is used to form a volatile azeotrope which contains both alcohol and entrainer and which is easily removed from the reboiler mechanism. This method reduces the amount of entrainer needed per unit of alkyl acrylate used and eliminates any need to purify the end product from entrainer contamination of the resulting N,N-dialkylaminoalkyl acrylate product.