Methods for synthesizing hierarchical zeolites for catalytic cracking
AssigneeSaudi Arabian Oil Company
InventorsMansour Ali Al-Herz, Musaed Salem Al-Ghrami, Mohammed Abdul Bari Siddiqui, Mian Rahat Saeed, Rabindran Jermy Balasamy
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Abstract
Provided here are zirconium-substituted hierarchical zeolite compositions and methods of preparing such catalytic compositions. One such method involves subjecting the zirconium-substituted zeolite to a framework modification process using a single template to produce a framework-modified zeolite, followed by subjecting the framework-modified zeolite to an ion exchange process to produce a hierarchical zeolite composition. Also provided are methods of catalytic cracking of hydrocarbon feedstocks using these zirconium-substituted hierarchical zeolite compositions.
Claims12
A method of making a hierarchical zeolite composition, said method comprising:
- subjecting an initial zeolite and a zirconium source to a partial isomorphous substitution process to produce a zirconium-substituted zeolite;
- subjecting the zirconium-substituted zeolite to a framework modification process using a single template to produce a framework-modified zeolite;
- and
- subjecting the framework-modified zeolite to an ion exchange process to produce a hierarchical pore structure in at least a portion of the framework-modified zeolite, resulting in the hierarchical zeolite composition.
A method of making a hierarchical zeolite composition, said method comprising:
- mixing an alumina source, a silica source, and a zirconium source under reaction conditions to produce a zirconium-containing zeolite;
- subjecting the zirconium-containing zeolite to a framework modification process using a single template to produce a framework-modified zeolite;
- and
- subjecting the framework-modified zeolite to an ion exchange process to produce a hierarchical pore structure in at least a portion of the framework-modified zeolite, resulting in the hierarchical zeolite composition.
Dependencies are inferred from the claim text.