Production of N,N-dialklylaminoethyl (meth)acrylates
US7829738B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 19, 2009 |
| Grant date | Nov 9, 2010 |
| Priority date | — |
| Expiry date | May 19, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C213/06
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.