公开(公告)号：US20190185331A1

公开(公告)日：2019-06-20

申请号：US15846109

申请日：2017-12-18

Applicant: Chevron U.S.A. Inc.

Inventor： Tracy Margaret DAVIS

IPC: C01B39/48 ,  B01J29/70 ,  B01D53/94

Abstract: The present invention relates to new crystalline zeolite SSZ-52x prepared using a quaternary ammonium cation templating agent, for example, having the structure: wherein X− is an anion which is not detrimental to the formation of the SSZ-52x. SSZ-52x is useful as a catalyst and shows improved durability, particularly with regard to NOx conversion.

公开(公告)号：US20160068403A1

公开(公告)日：2016-03-10

申请号：US14836314

申请日：2015-08-26

Applicant: CHEVRON U.S.A. INC

Inventor： Tianxiang LIU ,  Tracy Margaret DAVIS ,  Christopher Michael LEW ,  Dan XIE ,  Saleh Ali ELOMARI ,  Michael W. DEEM

IPC: C01B39/48

CPC classification number: C01B39/48

Abstract: A method is disclosed for preparing zeolite SSZ-52 using a computationally predicted organic structure directing agent. The computationally predicted structure organic directing agent is an organic structure directing agent other than an N,N-diethyl-5,8-dimethyl-azonium bicyclo[3.2.2.]nonane cation, and the difference in stabilization energy between the organic structure directing agent other than an N,N-diethyl-5,8-dimethyl-azonium bicyclo[3.2.2.]nonane cation and the N,N-diethyl-5,8-dimethyl-azonium bicyclo[3.2.2.]nonane cation is no more than 2.5 kJ mol−1 Si.

Abstract translation: 公开了一种使用计算预测的有机结构导向剂制备沸石SSZ-52的方法。 计算预测的结构有机导向剂是N，N-二乙基-5,8-二甲基 - 薁双环[3.2.2]壬烷阳离子以外的有机结构导向剂，有机结构指向 N，N-二乙基-5,8-二甲基吖啶双环[3.2.2。]壬烷阳离子和N，N-二乙基-5,8-二甲基薁双环[3.2.2。]壬烷阳离子 不大于2.5kJ mol-1 Si。

公开(公告)号：US20240123433A1

公开(公告)日：2024-04-18

申请号：US18270208

申请日：2021-12-29

Applicant: CHEVRON U.S.A. INC.

Inventor： Cong-Yan CHEN ,  Theodorus Ludovicus Michael MAESEN ,  Tracy Margaret DAVIS ,  Dan XIE

IPC: B01J29/068 ,  B01J35/64 ,  C10G47/18

CPC classification number: B01J29/068 ,  B01J35/643 ,  C10G47/18 ,  B01J2229/20 ,  B01J2229/42 ,  C10G2300/1033

Abstract: Provided is a process for hydrocracking normal paraffins into lighter normal paraffins with minimal formation of iso-paraffins. The process comprises hydrocracking a hydrocarbon feedstock comprising normal paraffins under hydrocracking conditions. The reaction is run in the presence of a selected catalyst, e.g., an LTA-type zeolite, with a requisite topology and acid site density. The zeolite has a framework type with voids greater than 0.50 nm in diameter, which are accessible through apertures characterized by a longest diameter of less than 0.50 nm and a shortest diameter of more than 0.30 nm. The reaction conducted in the presence of such a selected zeolite produces an n-paraffin rich product.

公开(公告)号：US20160068402A1

公开(公告)日：2016-03-10

申请号：US14836290

申请日：2015-08-26

Applicant: CHEVRON U.S.A. INC

Inventor： Tianxiang LIU ,  Tracy Margaret DAVIS ,  Christopher Michael LEW ,  Dan XIE ,  Saleh Ali ELOMARI ,  Michael W. DEEM

IPC: C01B39/48

CPC classification number: C01B39/48 ,  C01B39/06

Abstract: A method is disclosed for synthesizing zeolite SSZ-52 in the presence of an organic structure directing agent having the following structure (1): wherein R1, R2, R3 and R4 are independently selected from the group consisting of alkyl groups having from 1 to 3 carbon atoms and n has a value of 0, 1 or 2.

Abstract translation: 公开了一种在具有以下结构（1）的有机结构导向剂存在下合成沸石SSZ-52的方法：其中R 1，R 2，R 3和R 4独立地选自具有1至3个 碳原子和n具有0,1或2的值。