Purification of difluoromethane by extractive distillation
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 13, 2008
Grant Date -
Jun 26, 2003
app pub date -
Aug 12, 1998
filing date -
Aug 12, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention provides extractive distillation processes for removing difluoromethane (HFC-32) from a mixture comprising HFC-32 and at least one of chlorodifluoromethane (CFC-12), 1,1,1-trifluoroethane (HFC-143a), chloropentafluoroethane (CFC-115), and pentafluoroethane (HFC-125) using hydrocarbon, chlorocarbon, and oxygen-containing extractive agents.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
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