Cleaving Of Oligomeric (Meth) Acrylic Acid In A Liquid Phase Under Pressure
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
N/A
Issued Date -
Dec 6, 2007
app pub date -
Feb 18, 2005
filing date -
Feb 19, 2004
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
The present invention relates to a process for cleaving a (meth)acrylic acid oligomer of structure I wherein R.sub.1 is a hydrogen atom or a C.sub.1 to C.sub.10 alkyl groups, R.sub.2 is a hydrogen atom or a methyl group, and n is a whole number within the range between 1 and 200, optionally in the presence of a cleaving agent of the structure R.sub.3--OH or of the structure (R.sub.4).sub.2--N--H, whereby R.sub.3 is a hydrogen atom, a C.sub.1 to C.sub.12 alkyl group, or a --C.sub.xH.sub.2x--OH-- group, whereby x is a whole number within a range from 1 to 12, and R.sub.4 is a hydrogen atom or a C.sub.1 to C.sub.12 alkyl group, with the proviso that not both R.sub.4 groups are hydrogen atoms, whereby the (meth)acrylic acid oligomers are heated with the cleaving agent to a temperature of at least 50.degree. C. at a pressure of at least 1 bar. The present invention also relates to the use of water, optionally with a protic compound as cleaving agent for cleaving (meth)acrylic acid oligomers, a device for (meth)acrylic acid synthesis, the use of this device for production of (meth)acrylic acid, as well as (meth)acrylic acid which has been produced using this device.
First Claim
Family
International Classification(s)
- [Classification Symbol]
- [Patents Count]
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully