公开(公告)号：US20210046461A1

公开(公告)日：2021-02-18

申请号：US16947701

申请日：2020-08-13

Applicant: ExxonMobil Research and Engineering Company

Inventor： Chuansheng Bai ,  Majosefina Cunningham ,  Jihad M. Daaka ,  Preeti Kamakoti ,  Aruna Ramkrishnan ,  Anjaneya S. Kovvali ,  Anita S. Lee

IPC: B01J23/80 ,  B01J21/18 ,  B01J37/04 ,  B01J37/03 ,  B01J37/30 ,  B01J37/00 ,  B01J37/08 ,  B01J37/34 ,  B01J37/06 ,  B01J37/02 ,  B01J37/18 ,  B01J35/00 ,  B01J35/02 ,  B01J35/10 ,  C07C41/01

Abstract: Methods of producing metal catalysts can include mixing two or more metal salts and an aluminum salt in water to produce a metal catalyst precursor solution; mixing the metal catalyst precursor solution and an alkali metal buffer solution to produce a precipitate; ion exchanging the alkali metal in the precipitate for a non-alkali cation to produce a low-alkali metal precipitate comprising 3 wt % or less alkali metal by weight of the precipitate on a dry basis; producing a powder from the low-alkali metal precipitate; and calcining the powder to produce a metal catalyst. Such metal catalysts may be useful in producing bifunctional catalyst systems that are useful in, among other things, converting syngas to dimethyl ether in a single reactor

公开(公告)号：US20210046464A1

公开(公告)日：2021-02-18

申请号：US16947704

申请日：2020-08-13

Applicant: ExxonMobil Research and Engineering Company

Inventor： Chuansheng Bai ,  Jihad M. Daaka ,  Preeti Kamakoti ,  Aruna Ramkrishnan ,  Anjaneya S. Kovvali ,  Anita S. Lee

IPC: B01J29/46 ,  B01J23/80 ,  B01J37/04 ,  B01J37/00 ,  B01J37/08 ,  B01J37/10 ,  B01J35/02 ,  B01J35/00 ,  C07C41/01

Abstract: A method of producing bifunctional catalysts by extrusion may include mixing an acid catalyst, a metal catalyst, optionally a binder, and a fluid to produce a dough; extruding the dough to form an extrudate; producing a powder from the extrudate; and calcining the powder to produce an acid/metal bifunctional catalyst. Such acid/metal bifunctional catalysts may be useful in, among other things, converting syngas to dimethyl ether in a single reactor.

公开(公告)号：US20210046462A1

公开(公告)日：2021-02-18

申请号：US16993219

申请日：2020-08-13

Applicant: ExxonMobil Research and Engineering Company

Inventor： Chuansheng Bai ,  Majosefina Cunningham ,  Jihad M. Daaka ,  Preeti Kamakoti ,  Aruna Ramkrishnan ,  Anjaneya S. Kovvali ,  Anita S. Lee

IPC: B01J23/80 ,  B01J21/04 ,  B01J29/46 ,  B01J27/188 ,  B01J27/19 ,  B01J35/02 ,  B01J35/10 ,  B01J37/04 ,  B01J37/08 ,  B01J37/10 ,  B01J37/00 ,  B01J37/18 ,  C07C41/01

Abstract: A method of producing a acid/metal bifunctional catalyst may include: mixing an acid catalyst, a metal catalyst, and a fluid to produce a slurry, wherein the acid catalyst is present at 50 wt % or less relative to a total catalyst weight in the slurry; heating the slurry; producing a powder from the slurry; and calcining the powder to produce the acid/metal bifunctional catalyst. Such acid/metal bifunctional catalyst would be useful in the direct conversion of syngas to dimethyl ether as well as other reactions.

公开(公告)号：US20200231525A1

公开(公告)日：2020-07-23

申请号：US16738624

申请日：2020-01-09

Applicant: ExxonMobil Research and Engineering Company

Inventor： Jihad M. Dakka ,  Michael J. Sikorsky ,  Aruna Ramkrishnan ,  Chuansheng Bai ,  Anita S. Lee ,  Preeti Kamakoti ,  Anjaneya S. Kovvali ,  Jenna L. Walp

IPC: C07C41/09 ,  B01J8/02 ,  B01J8/00 ,  C07C29/153

Abstract: Systems and methods are provided for conversion of gas phase reactants including CO and H2 to C2+ products using multiple catalysts in a single reactor while reducing or minimizing deactivation of the catalysts. Separate catalysts can be used that correspond to a first catalyst, such as a catalyst for synthesis of methanol from synthesis gas, and a second catalyst, such as a catalyst for conversion of methanol to a desired C2+ product. The separate catalysts can be loaded into the reactor in distinct layers that are separated by spacer layers. The spacer layers can correspond to relatively inert particles, such as silica particles. Optionally, the spacer layer can include an adsorbent, such as boron supported on alumina or boron carbide particles. The adsorbent can be suitable for selective adsorption of the one or more reaction products (such as one or more reaction by-products), to allow for further reduction or minimization of the deactivation of the conversion catalysts.

公开(公告)号：US20210046470A1

公开(公告)日：2021-02-18

申请号：US16947706

申请日：2020-08-13

Applicant: ExxonMobil Research and Engineering Company

Inventor： Chuansheng Bai ,  Majosefina Cunningham ,  Jihad M. Daaka ,  Preeti Kamakoti ,  Aruna Ramkrishnan ,  Anjaneya S. Kovvali ,  Anita S. Lee

IPC: B01J37/08 ,  B01J37/02 ,  B01J37/04 ,  B01J23/80 ,  B01J33/00 ,  B01J21/18 ,  B01J29/40 ,  B01J37/10 ,  C07C41/01

Abstract: A method of producing bifunctional catalyst systems that include a carbon-coated metal catalyst may comprise: coating a metal catalyst particle with a carbon-containing small molecule to produce a coated metal catalyst particle; carbonizing the carbon-containing small molecule on the coated metal catalyst particle to produce a carbon-coated metal catalyst particle; and mixing the carbon-coated metal catalyst particle with an acid catalyst particle to produce an acid/metal bifunctional catalyst system. Further, a method of producing bifunctional catalyst systems that include a carbon-coated acid catalyst may be similarly performed by coating a metal catalyst particle with a carbon-containing small molecule to produce a coated metal catalyst particle; carbonizing the carbon-containing small molecule on the coated metal catalyst particle to produce a carbon-coated metal catalyst particle; and mixing the carbon-coated metal catalyst particle with an acid catalyst particle to produce an acid/metal bifunctional catalyst system.

公开(公告)号：US20210046460A1

公开(公告)日：2021-02-18

申请号：US16947699

申请日：2020-08-13

Applicant: ExxonMobil Research and Engineering Company

Inventor： Chuansheng Bai ,  Majosefina Cunningham ,  Jihad M. Daaka ,  Preeti Kamakoti ,  Aruna Ramkrishnan

IPC: B01J23/80 ,  B01J37/04 ,  B01J37/03 ,  B01J37/08 ,  B01J37/06 ,  B01J37/02 ,  B01J37/00 ,  B01J37/18 ,  B01J35/02 ,  B01J35/00 ,  B01J35/10 ,  C07C41/01

Abstract: Methods of producing metal catalysts can include mixing two or more metal salts and an aluminum salt in water to produce a metal catalyst precursor solution having a pH of about 2.5 to about 4.0; mixing the metal catalyst precursor solution and a basic solution having a pH of about 10 to about 13 to produce a mixture with a pH of about 6 to about 7 and a precipitate; producing a powder from the precipitate; and calcining the powder to produce a metal catalyst. Such metal catalysts may be useful in producing bifunctional catalyst systems that are useful in, among other things, converting syngas to dimethyl ether in a single reactor.

公开(公告)号：US10919830B2

公开(公告)日：2021-02-16

申请号：US16738624

申请日：2020-01-09

Applicant: ExxonMobil Research and Engineering Company

Inventor： Jihad M. Dakka ,  Michael J. Sikorsky ,  Aruna Ramkrishnan ,  Chuansheng Bai ,  Anita S. Lee ,  Preeti Kamakoti ,  Anjaneya S. Kovvali ,  Jenna L. Walp

IPC: C07C41/09 ,  C07C29/00 ,  C07C31/00 ,  C07C43/00 ,  B01J8/00 ,  B01J8/02 ,  C07C29/153 ,  B01J20/02 ,  B01J21/04 ,  B01J23/80 ,  C07C31/04 ,  C07C43/04

Abstract: Systems and methods are provided for conversion of gas phase reactants including CO and H2 to C2+ products using multiple catalysts in a single reactor while reducing or minimizing deactivation of the catalysts. Separate catalysts can be used that correspond to a first catalyst, such as a catalyst for synthesis of methanol from synthesis gas, and a second catalyst, such as a catalyst for conversion of methanol to a desired C2+ product. The separate catalysts can be loaded into the reactor in distinct layers that are separated by spacer layers. The spacer layers can correspond to relatively inert particles, such as silica particles. Optionally, the spacer layer can include an adsorbent, such as boron supported on alumina or boron carbide particles. The adsorbent can be suitable for selective adsorption of the one or more reaction products (such as one or more reaction by-products), to allow for further reduction or minimization of the deactivation of the conversion catalysts.