Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acid esters
Reexamination Certificate
2008-05-08
2011-11-01
Katakam, Sudhakar (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acid esters
C570S217000
Reexamination Certificate
active
08049030
ABSTRACT:
The present invention relates to a process for preparing (meth)acrylates, which comprises the transesterification of an alcohol with a low-boiling ester of (meth)acrylic acid in the presence of catalysts, with the alcohol liberated from the low-boiling ester of (meth)acrylic acid being separated off by distillation, characterized in that the molar ratio of low-boiling ester of (meth)acrylic acid to starting alcohol present in the reaction mixture is increased during the reaction by addition of low-boiling ester of (meth)acrylic acid. The process of the invention makes a particularly inexpensive preparation of (meth)acrylates having a very high purity possible.
REFERENCES:
patent: 4745213 (1988-05-01), Schlosser et al.
patent: 6008371 (1999-12-01), Knebel et al.
patent: 1747924 (2006-03-01), None
patent: 1 094 998 (1967-12-01), None
U.S. Appl. No. 12/667,604, filed Jan. 4, 2010, Schmitt, et al.
U.S. Appl. No. 12/667,822, filed Jan. 5, 2010, Knebel, et al.
U.S. Appl. No. 12/667,538, filed Jan. 4, 2010, Knebel, et al.
U.S. Appl. No. 08/373,422, filed Jan. 17, 1995, Knebel, et al.
U.S. Appl. No. 12/990,095, filed Oct. 28, 2010, Knebel.
Chinese Office Action mailed Feb. 14, 2011w/English translation.
Kehr Thomas
Knebel Joachim
Koelbl Gerhard
Lauster Guenther
Protzmann Guido
Evonik Röhm GmbH
Katakam Sudhakar
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
LandOfFree
Method for producing (meth)acrylates does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for producing (meth)acrylates, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for producing (meth)acrylates will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4288272