Process for preparing supported zeolitic membranes by temperature-controlled crystallisation
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jun 24, 2003
Grant Date -
May 8, 2003
app pub date -
Feb 7, 2002
filing date -
Feb 7, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A process is described for preparing a supported zeolite membrane constituted by a composite continuous zeolite/support layer of controlled thickness, wherein the zeolitic phase is principally localized in the pores of a porous support and optionally on the external surface thereof, the process comprising at least the formation of a precursor gel of the zeolite, bringing the gel into contact with the support and crystallizing the zeolite. The zeolite is crystallized by carrying out a thermal program comprising at least three steps in succession: a first constant temperature stage carried out at a temperature in the range 50.degree. C. to 300.degree. C., cooling to a temperature of strictly less than 50.degree. C. followed by a second constant temperature stage carried out at a temperature range of 50.degree. C. to 300.degree. C. The prepared membrane is used in particular in processes for separating gas or separating liquids.
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