Preparation of alkylene carbonates
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jun 11, 1991
Issued Date -
N/A
app pub date -
Mar 22, 1989
filing date -
Dec 2, 1981
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Alkylene carbonates, particularly ethylene carbonate, are prepared by the reaction of an alkylene oxide with carbon dioxide in the presence of a catalyst at temperatures in the region of the critical temperature of carbon dioxide, preferably 25.degree.-70.degree. C. and at autogenerated pressures, typically 30 to 200 kg/cm.sup.2 gauge. The conversion of alkylene oxide to alkylene carbonate can be carried out in the presence of water while minimizing the undesirable hydrolysis of the carbonate to athe corresponding alkylene glycol. With certain catalysts the presence of water improves the selectivity to the formation of the carbonate.
First Claim
Family
International Classification(s)
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