Method of making AFX zeolites having high thermal stability

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United States of America Patent

PATENT NO 11904303
SERIAL NO

17292753

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Abstract

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A method of forming an AFX zeolite in a hydrothermal synthesis that exhibits a silica to alumina (SiO2AI2O3) molar ratio (SAR) that is between 8:1 and 26:1; has a morphology that includes one or more of cubic, spheroidal, or rhombic particles with a crystal size that is in the range of about 0.1 micrometer (μm) to 10 μm. This AFX zeolite also exhibits a Brönsted acidity that is in the range of 1.2 mmol/g to 3.6 mmol/g as measured by ammonia temperature programmed desorption. A catalyst formed by substituting a metal into the framework of the zeolite exhibits about a 100% conversion of NO emissions over the temperature range of 300° C. to 650° C.

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Patent Owner(s)

Patent OwnerAddress
PACIFIC INDUSTRIAL DEVELOPMENT CORPORATION4788 RUNWAY BOULEVARD ANN ARBOR MI 48108

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Gao, De Troy, US 6 3
Lachapelle, Jeffery Northville, US 20 24
Li, Yunkui Ann Arbor, US 26 28
Shepard, David Canton, US 32 214
Wu, Wei Ann Arbor, US 1007 9430

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