US 12,122,746 B2
Method for manufacturing high-purity alkyl acrylates
Serge Tretjak, Saint Avold (FR); and Camille Hilpert, Saint Avold (FR)
Assigned to Arkema France, Colombes (FR)
Appl. No. 17/612,590
Filed by Arkema France, Colombes (FR)
PCT Filed Apr. 23, 2020, PCT No. PCT/FR2020/050691
§ 371(c)(1), (2) Date Nov. 19, 2021,
PCT Pub. No. WO2020/234519, PCT Pub. Date Nov. 26, 2020.
Claims priority of application No. 1905414 (FR), filed on May 23, 2019.
Prior Publication US 2022/0234982 A1, Jul. 28, 2022
Int. Cl. C07C 67/54 (2006.01); C07C 67/03 (2006.01); C07C 67/08 (2006.01)
CPC C07C 67/03 (2013.01) [C07C 67/08 (2013.01); C07C 67/54 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A process for the recovery/purification of a C4-C10 acrylic ester from a crude reaction mixture obtained by direct esterification of acrylic acid by the corresponding alcohol, comprising the step of drawing off a stream rich in acid impurities as a side draw-off via a side outlet of a distillation column during distillation of the crude reaction mixture.