公开(公告)号：US20240083827A1

公开(公告)日：2024-03-14

申请号：US18507896

申请日：2023-11-13

Applicant: Exelus Inc.

Inventor： Mitrajit Mukherjee ,  Vamsi M. Vadhri ,  Zawer Wojokh ,  Narendra Joshi

IPC: C07C2/62 ,  B01J29/00 ,  B01J29/08 ,  B01J29/12 ,  B01J29/14 ,  B01J37/08 ,  B01J37/30

CPC classification number: C07C2/62 ,  B01J29/005 ,  B01J29/082 ,  B01J29/085 ,  B01J29/087 ,  B01J29/12 ,  B01J29/123 ,  B01J29/126 ,  B01J29/14 ,  B01J29/143 ,  B01J29/146 ,  B01J37/088 ,  B01J37/30 ,  B01J2229/183 ,  B01J2229/37 ,  C07C2523/10 ,  C07C2523/42 ,  C07C2523/44 ,  C07C2529/89

Abstract: This invention describes methods of alkylating isobutane which include a catalytic reaction system comprising a crystalline zeolite catalyst and a rare earth-modified molecular sieve adsorbent (RE-MSA). The crystalline zeolite catalyst comprises sodalite cages and supercages, a Si/Al molar ratio of 20 or less, less than 0.5 weight percent alkali metals; and up to 5 wt % of Pt, Pd and or Ni, and acid-site density (including both Lewis and Bronsted acid sites) of at least 100 μmole/gm. The RE-modified molecular sieve adsorbent (Re-MSA) comprising sodalite cages and supercages, a Si/Al molar ratio of 20 or less, less than 1 wt % of alkali metals, RE (rare earth elements) in the range of 10 to 30 wt % and transition metals selected from groups 9-11 in the range from 2 wt % to 10 wt; and acid-site density of no more than 30 μmole/gm. The invention also includes methods of making RE-MSA.

公开(公告)号：US20220193643A1

公开(公告)日：2022-06-23

申请号：US17542293

申请日：2021-12-03

Applicant: Exelus Inc.

Inventor： Mitrajit Mukherjee ,  Vamsi Vadhri

IPC: B01J29/08 ,  B01J8/02 ,  B01J37/30 ,  B01J37/02 ,  B01J38/12 ,  C07C2/86 ,  C07C41/09

Abstract: The invention provides methods, catalysts and systems for producing styrene from DME and toluene. Zeolite catalysts comprising potassium, rubidium or cesium and containing at least 0.1 wt % B are described. Methods of making the catalysts are also described.

公开(公告)号：US20220080390A1

公开(公告)日：2022-03-17

申请号：US16876957

申请日：2020-05-18

Applicant: Exelus, Inc.

Inventor： Mitrajit Mukherjee ,  Vamsi M. Vadhri ,  Narendra Joshi ,  Grace Brock

IPC: B01J23/00 ,  B01J23/06 ,  B01J37/08 ,  B01J37/04 ,  B01J37/06 ,  B01J37/03 ,  B01J37/02 ,  B01J21/06 ,  B01J8/02 ,  B01J35/08 ,  B01J35/10 ,  B01J35/02 ,  C07C5/333

Abstract: A catalyst, methods of making, and process of dehydrogenating paraffins utilizing the catalyst. The catalyst includes at least 20 mass % Zn, a catalyst support and a catalyst stabilizer. The catalyst is further characterizable by physical properties such as activity parameter measured under specified conditions. The catalyst may also be disposed on a porous support in an attrition-resistant form and used in a fluidized bed reactor.

公开(公告)号：US11168039B2

公开(公告)日：2021-11-09

申请号：US16877403

申请日：2020-05-18

Applicant: Exelus, Inc.

Inventor： Mitrajit Mukherjee ,  Vamsi M. Vadhri ,  Narendra Joshi ,  Grace Brock ,  Gautham Krishnaiah ,  Michael Tallman

IPC: C07C5/00 ,  C07C5/333 ,  B01J23/06 ,  B01J21/12 ,  B01J21/06 ,  B01J38/12

Abstract: A catalyst, methods of making, and process of dehydrogenating paraffins utilizing the catalyst. The catalyst includes at least 20 mass % Zn, a catalyst support and a catalyst stabilizer. The catalyst is further characterizable by physical properties such as activity parameter measured under specified conditions. The catalyst may also be disposed on a porous support in an attrition-resistant form and used in a fluidized bed reactor.

公开(公告)号：US10662126B2

公开(公告)日：2020-05-26

申请号：US16246462

申请日：2019-01-12

Applicant: Exelus Inc.

Inventor： Mitrajit Mukherjee ,  Vamsi M. Vadhri ,  Narendra Joshi

IPC: C07C1/20 ,  C07C4/06 ,  C07C2/86 ,  C07C2/58 ,  B01J29/89 ,  B01J23/80 ,  B01J29/70 ,  B01J29/40 ,  B01J21/04 ,  B01J21/08 ,  B01J29/18 ,  B01J29/08 ,  B01J35/10 ,  B01J8/04 ,  C07C5/373 ,  C10G29/20 ,  C10G3/00 ,  B01J21/12 ,  B01J35/02

Abstract: Methods of simultaneously converting butanes and methanol to olefins over Ti-containing zeolite catalysts are described. The exothermicity of the alcohols to olefins reaction is matched by endothermicity of dehydrogenation reaction of butane(s) to light olefins resulting in a thermo-neutral process. The Ti-containing zeolites provide excellent selectivity to light olefins as well as exceptionally high hydrothermal stability. The coupled reaction may advantageously be conducted in a staged reactor with methanol/DME conversion zones alternating with zones for butane(s) dehydrogenation. The resulting light olefins can then be reacted with iso-butane to produce high-octane alkylate. The net result is a highly efficient and low cost method for converting methanol and butanes to alkylate.

公开(公告)号：US10179753B2

公开(公告)日：2019-01-15

申请号：US15331727

申请日：2016-10-21

Applicant: Exelus Inc.

Inventor： Mitrajit Mukherjee ,  Vamsi M. Vadhri ,  Narendra Joshi

IPC: C07C1/20 ,  C07C1/24 ,  C07C5/333 ,  C07C2/58 ,  C07C2/86 ,  B01J29/89 ,  B01J23/80 ,  B01J29/70 ,  B01J29/40 ,  B01J21/04 ,  B01J21/08 ,  B01J29/18 ,  B01J29/08 ,  B01J35/10 ,  B01J8/04 ,  C07C5/373 ,  C10G29/20 ,  C10G3/00

Abstract: Methods of simultaneously converting butanes and methanol to olefins over Ti-containing zeolite catalysts are described. The exothermicity of the alcohols to olefins reaction is matched by endothermicity of dehydrogenation reaction of butane(s) to light olefins resulting in a thermo-neutral process. The Ti-containing zeolites provide excellent selectivity to light olefins as well as exceptionally high hydrothermal stability. The coupled reaction may advantageously be conducted in a staged reactor with methanol/DME conversion zones alternating with zones for butane(s) dehydrogenation. The resulting light olefins can then be reacted with iso-butane to produce high-octane alkylate. The net result is a highly efficient and low cost method for converting methanol and butanes to alkylate.