公开(公告)号：US20220204874A1

公开(公告)日：2022-06-30

申请号：US17138009

申请日：2020-12-30

Applicant: Chevron U.S.A. Inc.

Inventor： Kenny Peinado ,  Jay Parekh ,  Jifei Jia ,  Yihua Zhang ,  Guan-Dao Lei ,  Guang Zhang

IPC: C10G67/02 ,  C10M177/00 ,  C10M101/02

Abstract: Provided in one embodiment is an improved and more flexible process for preparing a finished base oil or a white oil product comprising passing a dewaxed base oil product to a distillation column and separating the dewaxed base oil product into fuel and base oil product streams. The base oil product streams are tested to determine if they meet desired specifications. Base oil product streams that meet the desired minimum base oil specifications are passed to a hydrofinishing reactor to prepare a white oil product, or passed to direct sale.

公开(公告)号：US11229903B1

公开(公告)日：2022-01-25

申请号：US17138068

申请日：2020-12-30

Applicant: Chevron U.S.A. Inc.

Inventor： Yihua Zhang ,  Adeola Florence Ojo ,  Guan-Dao Lei

IPC: B01J29/70 ,  B01J37/04 ,  C10G45/64 ,  B01J21/04 ,  B01J23/10 ,  B01J23/89 ,  B01J23/83 ,  B01J23/63 ,  B01J35/02 ,  B01J37/08

Abstract: A method for making a hydroisomerization catalyst having improved thermal stability and metal dispersion characteristics, the catalyst prepared therefrom, and a process for making a base oil product using the catalyst are disclosed. The catalyst is prepared from a composition comprising an SSZ-91 molecular sieve and a rare earth modified alumina, with the composition being modified to contain a Group 8-10 metal, typically through impregnation of a Group 8-10 metal composition. The catalyst may be used to produce dewaxed base oil products by contacting the catalyst under hydroisomerization conditions with a hydrocarbon feedstock.

公开(公告)号：US10052619B2

公开(公告)日：2018-08-21

申请号：US15438295

申请日：2017-02-21

Applicant: Chevron U.S.A. Inc.

Inventor： Adeola Florence Ojo ,  Yihua Zhang ,  Guan-Dao Lei ,  Stacey Ian Zones

IPC: C01B39/00 ,  B01J29/74 ,  C01B39/48 ,  C01B39/06 ,  B01J20/18 ,  B01J20/28 ,  B01J20/30 ,  B01J35/10 ,  B01J37/00 ,  B01J37/08 ,  B01J37/30 ,  B01J37/02 ,  C10G65/04

CPC classification number: B01J29/74 ,  B01J20/18 ,  B01J20/28061 ,  B01J20/28071 ,  B01J20/3057 ,  B01J20/3078 ,  B01J20/3085 ,  B01J29/7046 ,  B01J29/7492 ,  B01J35/002 ,  B01J35/10 ,  B01J35/1019 ,  B01J35/1038 ,  B01J37/0018 ,  B01J37/0207 ,  B01J37/082 ,  B01J37/18 ,  B01J37/30 ,  B01J2229/183 ,  B01J2229/186 ,  B01J2229/24 ,  B01J2229/38 ,  B01J2229/40 ,  B01J2229/42 ,  C01B39/026 ,  C01B39/06 ,  C01B39/48 ,  C01P2006/12 ,  C01P2006/14 ,  C10G25/03 ,  C10G29/205 ,  C10G45/64 ,  C10G47/16 ,  C10G65/043 ,  C10G2300/70

Abstract: A new crystalline molecular sieve designated SSZ-95 is disclosed. In general, SSZ-95 is synthesized from a reaction mixture suitable for synthesizing MTT-type molecular sieves and maintaining the mixture under crystallization conditions sufficient to form product. The product molecular sieve is subjected to a pre-calcination step, and ion-exchange to remove extra-framework cations, and a post-calcination step. The molecular sieve has a MTT-type framework and a H-D exchangeable acid site density of 0 to 50% relative to molecular sieve SSZ-32.

公开(公告)号：US09677016B2

公开(公告)日：2017-06-13

申请号：US14299463

申请日：2014-06-09

Applicant: Chevron U.S.A. Inc.

Inventor： Kamala Krishna ,  Guan-Dao Lei

IPC: C10G65/04 ,  C10G45/62 ,  C10G45/64 ,  B01J23/58 ,  B01J29/70 ,  B01J37/02 ,  C01B39/48 ,  B01J29/80 ,  B01J29/74

CPC classification number: C10G65/043 ,  B01J23/58 ,  B01J29/70 ,  B01J29/7492 ,  B01J29/80 ,  B01J37/0201 ,  B01J37/0244 ,  B01J2229/20 ,  B01J2229/42 ,  C01B39/48 ,  C10G45/62 ,  C10G45/64 ,  C10G65/04 ,  C10G2300/1022 ,  C10G2300/301 ,  C10G2300/304 ,  C10G2400/10

Abstract: Processes and catalyst systems are provided for dewaxing a hydrocarbon feedstock to form a lubricant base oil. A layered catalyst system of the present invention may comprise a first hydroisomerization dewaxing catalyst disposed upstream from a second hydroisomerization dewaxing catalyst. Each of the first and second hydroisomerization dewaxing catalysts may be selective for the isomerization of n-paraffins. The first hydroisomerization catalyst may have a higher level of selectivity for the isomerization of n-paraffins than the second hydroisomerization dewaxing catalyst. At least one of the first and second hydroisomerization dewaxing catalysts comprises small crystallite zeolite SSZ-32x.

公开(公告)号：US09616419B2

公开(公告)日：2017-04-11

申请号：US14862358

申请日：2015-09-23

Applicant: CHEVRON U.S.A. INC.

Inventor： Yihua Zhang ,  Kamala Raghunathan Krishna ,  Guan-Dao Lei ,  Theodorus Ludovicus Michael Maesen

IPC: B01J29/74 ,  C10G45/64 ,  B01J35/10 ,  C10M101/02 ,  B01J21/04 ,  B01J35/00

CPC classification number: B01J29/74 ,  B01J21/04 ,  B01J29/7461 ,  B01J29/7492 ,  B01J35/00 ,  B01J35/0026 ,  B01J35/1019 ,  B01J35/1038 ,  B01J35/1042 ,  B01J35/1047 ,  B01J35/1061 ,  B01J35/108 ,  C10G45/64 ,  C10M101/02

Abstract: The present invention is directed to an improved finished hydroisomerization catalyst manufactured from a first high nanopore volume (HNPV) alumina and a pore size distribution characterized by a full width at half-maximum, normalized to pore volume, of 15 to 25 nm·g/cc, and a second HNPV alumina having a pore size distribution characterized by a full width at half-maximum, normalized to pore volume, of 5 to 15 nm·g/cc. Their combination yields a HNPV base extrudate having a low particle density as compared to a conventional base extrudates.

公开(公告)号：US20170056870A1

公开(公告)日：2017-03-02

申请号：US14837094

申请日：2015-08-27

Applicant: Chevron U.S.A. Inc.

Inventor： Adeola Florence Ojo ,  Dan Xie ,  Yihua Zhang ,  Guan-Dao Lei

IPC: B01J29/80 ,  B01J29/74

CPC classification number: B01J29/80 ,  B01J29/7023 ,  B01J29/703 ,  B01J29/7446 ,  B01J29/7461 ,  C01B39/023 ,  C01B39/48

Abstract: Methods for making a family of new crystalline molecular sieves designated SSZ-91 are disclosed. 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.

Abstract translation: 公开了制备一种称为SSZ-91的新型结晶分子筛家族的方法。 分子筛SSZ-91在结构上类似于落在ZSM-48族分子筛内的筛，其特征在于：（1）具有低断层程度，（2）与常规的相比，抑制加氢裂化的低纵横比 长径比大于8的ZSM-48材料和（3）基本上是相纯的。