Process for preparing tertiary alkyl esters of (meth)acrylic...

Details Process for preparing tertiary alkyl esters of (meth)acrylic... Process for preparing tertiary alkyl esters of (meth)acrylic...

2008-07-07

2010-06-29

Zucker, Paul A (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acid esters

Reexamination Certificate

active

07745658

ABSTRACT:
The present invention relates to a process for preparing tertiary alkyl esters of (meth)acrylic acid having at least 4 carbon atoms in the alkyl radical. The process includes reacting (meth)acrylic acid with at least one olefin of formula (I) in homogeneous phase in the presence of an acidic catalyst in a reactor, discharging the resulting reaction mixture from the reactor, separating the discharged reaction mixture into a first mixture which contains the catalyst and a second mixture which contains the tertiary alkyl ester of (meth)acrylic acid having at least 4 carbon atoms in the alkyl radical, and removing the tertiary alkyl ester of (meth)acrylic acid having at least 4 carbon atoms in the alkyl radical from the second mixture in the presence of compound S, which comprises at least one N-oxyl group and is added as a stabilizer.

REFERENCES:
patent: 5322960 (1994-06-01), Sakamoto et al.
patent: 2003/0181754 (2003-09-01), Kroker et al.

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