Process for the Synthesis of Chiral Propargylic Alcohols
US-2016326101-A1 · Nov 10, 2016 · US
Method for purifying the azeotropic fraction generated during the synthesis of N,N-dimethyl aminoethyl acrylate
US8940925B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8940925-B2 |
| Application number | US-201013146601-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 27, 2010 |
| Priority date | Jan 27, 2009 |
| Publication date | Jan 27, 2015 |
| Grant date | Jan 27, 2015 |
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Abstract
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The invention relates to a method for producing N,N-dimethylaminoethyl acrylate by the transesterification reaction of an alykl acrylate by N1N-dimethylaminoethanol, and more particularly relates to a method for purifying the azeotropic fraction generated during said reaction, thereby enabling the recycling thereof on the alkyl acrylate production unit. The aim of the method of the invention is in particular to remove the acetaldehyde and the dialkoxyethane contained in the azeotropic fraction, either by the direct distillation of the azeotropic fraction or by the distillation of the aqueous phase resulting from the water scrubbing of the azeotropic fraction.
First claim
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The invention claimed is: 1. A method for purifying an azeotropic fraction generated during the synthesis of N,N-dimethyl aminoethyl acrylate of formula: H 2 C=CHCOOCH 2 CH 2 N(CH 3 ) 2 by transesterification of an alkyl acrylate of formula CH 2 =CH—COOR 1 by N,N-dimethyl aminoethanol, wherein R 1 represents a methyl or ethyl radical; said method comprising: distilling transesterification reaction products in a first distillation column in communication with…
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- C07C213/10Primary
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
- C07C213/06Primary
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
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- What does patent US8940925B2 cover?
- The invention relates to a method for producing N,N-dimethylaminoethyl acrylate by the transesterification reaction of an alykl acrylate by N1N-dimethylaminoethanol, and more particularly relates to a method for purifying the azeotropic fraction generated during said reaction, thereby enabling the recycling thereof on the alkyl acrylate production unit. The aim of the method of the invention is…
- Who is the assignee on this patent?
- Paul Jean-Michel, Graire Coralie, Riehl Audrey, and 1 more
- What technology area does this patent fall under?
- Primary CPC classification C07C213/10. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jan 27 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).