Introduction of mesoporosity into low silica zeolites
AssigneeRive Technology, Inc.
InventorsKunhao Li, Javier Garcia-Martinez, Michael G. Beaver
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Abstract
Mesoporous X and A zeolites and methods for production thereof are disclosed herein. Such mesoporous zeolites can be prepared by contacting an initial zeolite with an acid in conjunction with a mesopore forming agent. The initial zeolite can have a framework silicon-to-aluminum content in the range of from about 1 to about 2.5. Additionally, such mesoporous zeolites can have a total 20 to 135 Å diameter mesopore volume of at least 0.05 cc/g.
Claims24
A method of forming a material comprising a mesoporous zeolite, said method comprising:
- (a) contacting an initial large pore zeolite with a mesopore forming agent to thereby form a first treatment mixture comprising an agent-treated zeolite and said mesopore forming agent;
- (b) contacting said first treatment mixture with an acid to thereby form a second treatment mixture comprising an acid-treated zeolite, said acid, and said mesopore forming agent;
- and
- (c) contacting said acid-treated zeolite with a base to thereby form a base-treated zeolite having a greater 20 to 135 Å diameter mesopore volume than said initial zeolite,
- wherein said initial large pore zeolite has a framework silicon-to-aluminum ratio (“Si/Al”) of less than 2.5.
A method of forming a material comprising a mesoporous zeolite, said method comprising:
- (a) contacting an initial large pore zeolite having a framework silicon-to-aluminum ratio in the range of from about 1 to about 2.5 with a mesopore forming agent to thereby produce a first treatment mixture comprising an initially-treated zeolite and said mesopore forming agent;
- (b) introducing an acid into said first treatment mixture to thereby form a second treatment mixture comprising an acid-treated zeolite, said mesopore forming agent, and said acid;
- and
- (c) contacting said acid-treated zeolite with a base to thereby form a base-treated zeolite having a greater 20 to 135 Å diameter mesopore volume than said initial large pore zeolite, wherein said base-treated zeolite has a total 20 to 135 Å diameter mesopore volume of at least 0.05 cc/g.
Dependencies are inferred from the claim text.