Patent ID: 11958800
Assignee: EVONIK OPERATIONS GMBH
Field: Organic fine chemistry (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 0:
1. A process for the preparation of a (meth)acrylic acid ester, comprising step (a) as follows:
(a) reacting a (meth)acrylic acid anhydride of Formula (I):, wherein R1 is a hydrogen atom or a methyl group;
with a substrate in the presence of a first catalyst to form a product mixture comprising the (meth)acrylic acid ester; and wherein:
the substrate is selected from the group consisting of: a primary alcohol with one hydroxyl group, a secondary alcohol with one hydroxyl group, and a tertiary alcohol with one hydroxyl group; and
the first catalyst is magnesium bromide;

wherein the temperature during step (a) is kept between 40° C. and 110° C. and wherein the reaction has a conversion of greater than 18%;
and further comprising steps (b) and (c) which are carried out after step (a):
(b) adding an auxiliary alcohol to the product mixture obtained in step (a), wherein a product mixture comprising the (meth)acrylic acid ester and a (meth)acrylic acid ester of the auxiliary alcohol is formed; and
(c) removing the (meth)acrylic acid ester of the auxiliary alcohol from the product mixture obtained in step (b).