SSZ-91 catalyst
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.
Claims15
A catalyst, suitable for use in hydrocarbon hydrocracking, dewaxing, and olefin isomerization reactions, and in the alkylation and isomerization of aromatic compounds, the 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 comprises one or more modifying metals selected from Groups 8 to 10 metals of the Periodic Table, and is composited with one or more catalytically active or inactive materials, synthetic or naturally occurring molecular sieves, or inorganic materials selected from clays, silica, or metal oxides.
Dependencies are inferred from the claim text.