Process for drying water-wet membranes
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 14, 1984
Grant Date -
N/A
app pub date -
May 17, 1982
filing date -
May 17, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An improved process for drying water-wet, cellulose ester membranes is described. It has been found that by contacting one side of the membrane with a liquid mixture of a water-miscible, volatile C.sub.1 to C.sub.6 hydrocarbon and a water-immiscible organic compound, while an inert gas stream or vacuum is maintained on the other surface of the membrane, water can be displaced from the membrane economically, rapidly and without adversely affecting the structure of the membrane. A 1 to 1 volume mixture of isopropanol and isooctane is particularly preferred in this step. The essentially water-free membrane is then dried by applying reduced pressure or an inert gas stream to produce a membrane having exceptional separation characteristics.
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