公开(公告)号：US11148952B1

公开(公告)日：2021-10-19

申请号：US17176636

申请日：2021-02-16

Applicant: CHEVRON U.S.A. INC.

Inventor： Cong-Yan Chen ,  Stacey Ian Zones ,  Tracy Margaret Davis

IPC: C01B39/02 ,  B01J37/00 ,  C01B37/00

Abstract: A method of increasing hydrophobicity of a molecular sieve is provided. The method includes: (a) providing a metallosilicate molecular sieve having a framework consisting of oxides of silicon (Si) and a metal (M), wherein M is boron or zinc; (b) contacting the metallosilicate molecular sieve with a liquid aqueous system, thereby obtaining a demetallated molecular sieve having silanol nests and empty framework sites; and (c) thermally treating the demetallated molecular sieve, thereby obtaining a thermally-treated molecular sieve, wherein the thermally-treated molecular sieve (i) retains the three-dimensional framework structure of the metallosilicate molecular sieve and (ii) has a higher Si/M molar ratio as compared to the metallosilicate molecular sieve.

公开(公告)号：US10472247B2

公开(公告)日：2019-11-12

申请号：US15846109

申请日：2017-12-18

Applicant: Chevron U.S.A. Inc.

Inventor： Tracy Margaret Davis

IPC: C01B39/02 ,  B01J29/80 ,  B01D53/94 ,  C01B39/48 ,  B01J29/70 ,  B01J29/06

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：US10099936B2

公开(公告)日：2018-10-16

申请号：US15839099

申请日：2017-12-12

Applicant: Chevron U.S.A. Inc.

Inventor： Saleh Ali Elomari ,  Tracy Margaret Davis

IPC: C07D211/06 ,  C01B39/48 ,  C01B39/02 ,  B01J29/70 ,  B01J37/00 ,  B01J37/04 ,  C07D207/06 ,  C07D211/26

Abstract: A method is disclosed for synthesizing a zeolite having the framework structure of SSZ-16 using a structure directing agent comprising a dication selected from one or more of 1,1′-(1,4-cyclohexylenedimethylene)bis[1-methylpiperidinium]; 1,1′-(1,4-cyclohexylenedimethylene)bis[1-ethylpiperidinium]; 1,1′-(1,4-cyclohexylenedimethylene)bis[1-methylpyrrolidinium]; and 1,1′-(1,4-cyclohexylenedimethylene)bis[1-ethylpyrrolidinium].

公开(公告)号：US20180111838A1

公开(公告)日：2018-04-26

申请号：US15839099

申请日：2017-12-12

Applicant: Chevron U.S.A. Inc.

Inventor： Saleh Ali Elomari ,  Tracy Margaret Davis

IPC: C01B39/48 ,  B01J29/70 ,  B01J37/04 ,  B01J37/00 ,  C07D207/06 ,  C07D211/26

CPC classification number: C01B39/48 ,  B01J29/70 ,  B01J37/0018 ,  B01J37/04 ,  C01B39/026 ,  C01P2002/72 ,  C01P2004/03 ,  C07D207/06 ,  C07D211/26

Abstract: A method is disclosed for synthesizing a zeolite having the framework structure of SSZ-16 using a structure directing agent comprising a dication selected from one or more of 1,1′-(1,4-cyclohexylenedimethylene)bis[1-methylpiperidinium]; 1,1′-(1,4-cyclohexylenedimethylene)bis[1-ethylpiperidinium]; 1,1′-(1,4-cyclohexylenedimethylene)bis[1-methylpyrrolidinium]; and 1,1′-(1,4-cyclohexylenedimethylene)bis[1-ethylpyrrolidinium].

公开(公告)号：US20170348678A1

公开(公告)日：2017-12-07

申请号：US15498792

申请日：2017-04-27

Applicant: Chevron U.S.A. Inc.

Inventor： Tracy Margaret Davis

IPC: B01J29/70 ,  B01J37/00 ,  C01B39/48 ,  B01D53/94 ,  F01N3/20 ,  C07C1/20 ,  B01J37/10 ,  B01J37/04

CPC classification number: B01J29/70 ,  B01D53/9418 ,  B01D2255/2092 ,  B01D2255/50 ,  B01J29/74 ,  B01J29/76 ,  B01J29/78 ,  B01J35/04 ,  B01J37/0009 ,  B01J37/0018 ,  B01J37/0246 ,  B01J37/04 ,  B01J37/10 ,  C01B39/48 ,  C07C1/20 ,  C07C2529/70 ,  F01N3/2066 ,  F01N2370/04

Abstract: An AFX framework type zeolite having a SiO2/Al2O3 molar ratio of greater than 50 is disclosed. The high-silica AFX framework type zeolite is synthesized from a reaction mixture having high silica and low hydroxide concentrations in the presence of an organic structure directing agent comprising 1,3-bis(1-adamantyl)imidazolium cations.

公开(公告)号：US20170158520A1

公开(公告)日：2017-06-08

申请号：US14959633

申请日：2015-12-04

Applicant: Chevron U.S.A. Inc.

Inventor： Dan Xie ,  Tracy Margaret Davis

IPC: C01B39/48 ,  B01J37/00 ,  B01J29/70

CPC classification number: C01B39/48 ,  B01J29/70 ,  B01J37/0018

Abstract: A method is disclosed for making aluminosilicate zeolites having the offretite structure from amorphous sources of silica and alumina in the presence of benzyltrimethylammonium cations as a structure directing agent.