Process for the production of difluoromethane
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 20, 2004
Grant Date -
Jan 15, 2004
app pub date -
Jul 12, 2002
filing date -
Jul 10, 2002
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A process for vapor phase fluorination of methylene chloride with anhydrous hydrogen fluoride (AHF) in the presence of a coprecipitated chromia-alumina impregnated with zinc salt as catalyst, removing HCl and heavier components by distillation, subjecting HFC-32 rich cut to a further step of fluorination in the presence of a fluorination catalyst.
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