Abstract
The present invention provides zirconium-substituted multi-stage pore zeolite compositions and methods of making such catalytic compositions. One such method includes subjecting a zirconium-substituted zeolite to a framework modification process using a single templating agent to produce a framework-modified zeolite, followed by an ion exchange process on the framework-modified zeolite to produce a multi-stage pore zeolite composition. The invention also provides methods for catalytic cracking of hydrocarbon feedstocks using these zirconium-substituted multi-stage pore zeolite compositions.
| Original language | English |
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| Patent number | CN112638525B |
| State | Published - 2023 |