Molecular sieve SSZ-91, methods for preparing SSZ-91, and uses for SSZ-91
AssigneeChevron U.S.A. Inc.
InventorsAdeola Florence Ojo, Dan Xie, Yihua Zhang, Guan-Dao Lei
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Abstract
A family of new crystalline molecular sieves designated SSZ-91 is disclosed, as are methods for making SSZ-91 and uses for SSZ-91. Molecular sieve SSZ-91 is structurally similar to sieves falling within the ZSM-48 family of molecular sieves, and is characterized as: (1) having a low degree of faulting, (2) a low aspect ratio that inhibits hydrocracking as compared to conventional ZSM-48 materials having an aspect ratio of greater than 8, and (3) is substantially phase pure.
Claims16
A hydroprocessing catalyst comprising a molecular sieve belonging to the ZSM-48 family of zeolites, wherein the molecular sieve comprises:
- at least 70% polytype 6 of the total ZSM-48-type material present in the product, and
- an additional EUO-type molecular sieve phase in an amount of between 0 and 3.5 percent by weight of the total product;
- and
- wherein the molecular sieve has a morphology characterized as polycrystalline aggregates comprising crystallites collectively having an average aspect ratio of between 1 and 8, and wherein the catalyst further comprises one or more Groups 8 to 10 metals of the Periodic Table.
Dependencies are inferred from the claim text.