Patent ID: 7745658
Filing Date: 2010-06-29
Classification: C07C

Abstract:
1. A process for preparing tertiary alkyl esters of (meth)acrylic acid having at least 4 carbon atoms in the alkyl radical, comprising: (1) reacting (meth)acrylic acid with at least one olefin of formula I: in which R in homogeneous phase in the presence of an acidic catalyst in a reactor to form a first mixture, (2) discharging said first mixture from the reactor to obtain a discharged reaction mixture, (3) separating the discharged reaction mixture into a catalyst mixture which comprises the catalyst and a tertiary alkyl ester mixture which comprises the tertiary alkyl ester of (meth)acrylic acid having at least 4 carbon atoms in the alkyl radical, and (4) removing the tertiary alkyl ester of (meth)acrylic acid having at least 4 carbon atoms in the alkyl radical from the tertiary alkyl ester mixture, which comprises, (5) in (4), adding in an amount of from 400 to 700 ppm, by weight, at least one compound S which comprises at least one N-oxyl group, as stabilizer.