Method for heteroatom lattice substitution in large and extra-large pore borosilicate zeolites
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Oct 22, 2002
Grant Date -
N/A
app pub date -
Sep 14, 2000
filing date -
Sep 14, 2000
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The present invention provides a method for preparing a zeolite having lattice substituted heteroatoms. The method includes: (a) contacting a calcined borosilicate zeolite with an acid, thereby producing an at least partially deboronated zeolite; and (b) contacting the at least partially deboronated zeolite with a salt-containing aqueous solution comprising one or more salts selected from the group consisting of aluminum salt, gallium salt, and iron salt, thereby producing a silicate or borosilicate zeolite having a lattice comprising aluminum atoms; gallium atoms, iron atoms or a combination thereof. Step (b) is conducted at a pH of about 3.5 or less. Preferably, step (a), step (b) or both are conducted at a temperature of from about ambient temperature to about 300.degree. C., preferably, under stirring/tumbling.
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