Patent ID: 11926588
Assignee: ARKEMA FRANCE
Field: Organic fine chemistry (Chemistry)
Classification: CPC C | IPC C

Claim 0:
1. A process for recovering a purified C4-C12 (meth)acrylic ester, starting from a crude reaction mixture including Michael adducts obtained by direct esterification of the (meth)acrylic acid with the corresponding C4-C12 alcohol wherein said process comprises the step of:
using a purification system comprising a dividing wall column equipped with a separating wall which is not joined to the upper dome of the column in the top part and is joined to the bottom of the column in the bottom part, and associated at the top with a single condenser and at the bottom with two boilers, said dividing wall column comprising a common rectification section above the wall, a prefractionation section comprising a feed of the crude reaction mixture of the column, and a withdrawal section separated from the prefractionation section by the wall and comprising the withdrawal of the purified ester; wherein said dividing wall column further comprises an outlet at the upper dome of the column, two outlets at the bottom part of the column and one outlet at the withdrawal section.