Method for manufacturing high-purity alkyl acrylates
US12122746B2 · kind B2 · utility
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10Claims
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Key dates
| Filing date | Apr 23, 2020 |
| Grant date | Oct 22, 2024 |
| Priority date | — |
| Expiry date | Oct 16, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C67/54
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention relates to the manufacture of alkyl acrylates by direct esterification of acrylic acid by the corresponding alcohol. In particular, the invention relates to the use of a topping column equipped with a side draw-off making it possible to draw off a stream rich in acid impurities, such as β-hydroxypropionic acid and β-acryloyloxypropionic acid, during the distillation of the crude reaction mixture, in order to produce an acrylic ester meeting purity standards which are compatible with its use to prepare acrylic polymers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.