Invention Grant
- Patent Title: Method of making SSZ-13 zeolites with high acidity and low silica to alumina ratio (SAR)
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Application No.: US17283584Application Date: 2019-10-24
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Publication No.: US11883804B2Publication Date: 2024-01-30
- Inventor: De Gao , Yunkui Li , David Shepard , Jeffery Lachapelle , Wei Wu
- Applicant: Pacific Industrial Development Corporation
- Applicant Address: US MI Ann Arbor
- Assignee: Pacific Industrial Development Corporation
- Current Assignee: Pacific Industrial Development Corporation
- Current Assignee Address: US MI Ann Arbor
- Agency: Dickinson Wright PLLC
- International Application: PCT/US2019/057804 2019.10.24
- International Announcement: WO2020/092112A 2020.05.07
- Date entered country: 2021-04-08
- Main IPC: B01J29/76
- IPC: B01J29/76 ; B01D53/94 ; B01J20/28 ; B01J35/02 ; B01J35/10 ; B01J37/00 ; B01J37/02 ; B01J37/04 ; B01J37/10 ; B01J37/30 ; C01B39/48 ; F01N3/20 ; F01N3/28

Abstract:
A method of forming an SSZ-13 zeolite in a hydrothermal synthesis yields an SSZ-13 zeolite that exhibits a silica to alumina (SiO2:Al2O3) molar ratio (SAR) that is less than 16:1; 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 SSZ-13 also exhibits a Brönsted acidity that is in the range of 2.0 mmol/g to 3.4 mmol/g as measured by ammonia temperature programmed desorption. A catalyst formed by substituting a metal into the framework of the zeolite provides for low temperature light-off of the NOx conversion reactions, while maintaining substantial performance at higher temperatures demonstrating hydrothermal stability.
Public/Granted literature
- US20210339233A1 METHOD OF MAKING SSZ-13 ZEOLITES WITH HIGH ACIDITY AND LOW SILICA TO ALUMINA RATIO (SAR) Public/Granted day:2021-11-04
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