公开(公告)号：US20230348798A1

公开(公告)日：2023-11-02

申请号：US18042724

申请日：2021-08-30

Applicant: CHEVRON U.S.A. INC.

Inventor： Subhasis BHATTACHARYA ,  Yihua ZHANG ,  Guan-Dao LEI ,  Ajit R. PRADHAN

IPC: C10G45/62 ,  C10G45/64 ,  C10G65/04 ,  B01J29/74

CPC classification number: C10G45/62 ,  B01J29/74 ,  C10G45/64 ,  C10G65/043 ,  C10G2300/302 ,  C10G2300/304 ,  C10G2400/10

Abstract: An improved process and catalyst system for making a base oil product and for improving base oil cloud point and pour point characteristics, while also providing good product yields. The process and catalyst system generally involves the use of a layered catalyst system comprising an SSZ-91 catalyst and an SSZ-32X catalyst arranged to sequentially contact a hydrocarbon feedstock with both catalysts and thereby provide dewaxed base oil products.

公开(公告)号：US20220204867A1

公开(公告)日：2022-06-30

申请号：US17138260

申请日：2020-12-30

Applicant: CHEVRON U.S.A. INC.

Inventor： Kamala R. KRISHNA ,  Yihua ZHANG ,  GUAN-DAO LEI ,  Adeola Florence OJO

IPC: C10G11/05 ,  B01J29/70 ,  C10G3/00

Abstract: Described herein are processes for hydroisomerising an unconventional feedstock using a hydroisomerisation catalyst comprising zeolite SSZ-91, zeolite SSZ-32, or zeolite SSZ-32x to provide a diesel fuel.

公开(公告)号：US20210269319A1

公开(公告)日：2021-09-02

申请号：US17317469

申请日：2021-05-11

Applicant: Chevron U.S.A. Inc.

Inventor： Adeola Florence OJO ,  Dan XIE ,  Yihua ZHANG ,  Guan-Dao LEI

IPC: C01B39/02 ,  B01J29/74 ,  C01B39/46 ,  B01J29/70 ,  B01J29/80 ,  B01J35/00 ,  C01B39/48 ,  B01J29/72 ,  B01J29/76

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.

公开(公告)号：US20200299142A1

公开(公告)日：2020-09-24

申请号：US16848551

申请日：2020-04-14

Applicant: Chevron U.S.A. Inc.

Inventor： Adeola Florence OJO ,  Dan XIE ,  Yihua ZHANG ,  Guan-Dao LEI

IPC: C01B39/02 ,  B01J29/74 ,  C01B39/46 ,  B01J29/70 ,  C01B39/48 ,  B01J29/80 ,  B01J35/00

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.