公开(公告)号：US20210346868A1

公开(公告)日：2021-11-11

申请号：US17331539

申请日：2021-05-26

Applicant: Exelus Inc.

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

IPC: B01J23/00 ,  B01J23/06 ,  B01J23/34 ,  B01J23/648 ,  B01J23/72 ,  B01J23/745 ,  B01J35/02 ,  B01J35/10 ,  C07C5/333

Abstract: The invention relates to a catalyst composition suitable for the dehydrogenation of paraffins having 2-8 carbon atoms comprising zinc oxide and titanium dioxide, optionally further comprising oxides of cerium (Ce), dysprosium (Dy), erbium (Er), europium (Eu), gadolinium (Gd), lanthanum (La), neodymium (Nd), praseodymium (Pr), samarium (Sm), terbium (Tb), ytterbium (Yb), yttrium (Y), tungsten (W) and Zirconium (Zr) or mixtures thereof, wherein said catalyst composition is substantially free of chromium and platinum. The catalysts possess unique combinations of activity, selectivity, and stability. Methods for preparing improved dehydrogenation catalysts and a process for dehydrogenating paraffins having 2-8 carbon atoms, comprising contacting the mixed metal oxide catalyst with paraffins are also described. 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：US20170113981A1

公开(公告)日：2017-04-27

申请号：US15331727

申请日：2016-10-21

Applicant: Exelus Inc.

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

IPC: C07C2/86 ,  B01J29/89 ,  B01J23/80 ,  B01J29/70 ,  B01J8/04 ,  B01J21/04 ,  B01J21/08 ,  B01J29/18 ,  B01J29/08 ,  B01J35/10 ,  C07C2/58 ,  B01J29/40

CPC classification number: C07C2/864 ,  B01J8/04 ,  B01J21/04 ,  B01J21/08 ,  B01J21/12 ,  B01J23/80 ,  B01J29/08 ,  B01J29/087 ,  B01J29/18 ,  B01J29/40 ,  B01J29/7007 ,  B01J29/7057 ,  B01J29/89 ,  B01J35/023 ,  B01J35/1019 ,  B01J35/1023 ,  B01J35/1057 ,  B01J2523/00 ,  C07C1/20 ,  C07C2/58 ,  C07C2/865 ,  C07C5/373 ,  C07C2521/04 ,  C07C2521/06 ,  C07C2521/08 ,  C07C2521/12 ,  C07C2523/755 ,  C07C2523/80 ,  C07C2529/08 ,  C07C2529/18 ,  C07C2529/40 ,  C07C2529/89 ,  C10G3/49 ,  C10G29/205 ,  C07C11/02 ,  C07C11/08 ,  C07C9/21 ,  B01J2523/27 ,  B01J2523/41 ,  B01J2523/47 ,  B01J2523/847

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：US11851386B2

公开(公告)日：2023-12-26

申请号：US17966697

申请日：2022-10-14

Applicant: Exelus Inc.

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

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

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 Brønsted acid sites) of at least 100 mole/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 mole/gm. The invention also includes methods of making RE-MSA.

公开(公告)号：US20230119464A1

公开(公告)日：2023-04-20

申请号：US17966697

申请日：2022-10-14

Applicant: Exelus Inc.

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

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

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 Brønsted 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：US11040331B2

公开(公告)日：2021-06-22

申请号：US16586981

申请日：2019-09-28

Applicant: Exelus, Inc. ,  Kellogg Brown and Root LLC

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

IPC: B01J23/06 ,  B01J21/04 ,  B01J21/06 ,  B01J21/08 ,  B01J23/10 ,  B01J35/00 ,  B01J35/02 ,  B01J35/10 ,  B01J37/02 ,  B01J37/08 ,  B01J38/12 ,  C07C5/333

Abstract: The invention relates to a catalyst composition suitable for the dehydrogenation of paraffins having 2-8 carbon atoms comprising zinc oxide and titanium dioxide, optionally further comprising oxides of cerium (Ce), dysprosium (Dy), erbium (Er), europium (Eu), gadolinium (Gd), lanthanum (La), neodymium (Nd), praseodymium (Pr), samarium (Sm), terbium (Tb), ytterbium (Yb), yttrium (Y), tungsten (W) and Zirconium (Zr) or mixtures thereof, wherein said catalyst composition is substantially free of chromium and platinum. The catalysts possess unique combinations of activity, selectivity, and stability. Methods for preparing improved dehydrogenation catalysts and a process for dehydrogenating paraffins having 2-8 carbon atoms, comprising contacting the mixed metal oxide catalyst with paraffins are also described. 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：US11033880B2

公开(公告)日：2021-06-15

申请号：US16586980

申请日：2019-09-28

Applicant: Exelus, Inc.

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

IPC: B01J23/06 ,  B01J23/00 ,  B01J23/34 ,  B01J23/648 ,  B01J23/72 ,  B01J23/745 ,  B01J35/02 ,  B01J35/10 ,  C07C5/333 ,  B01J21/02 ,  B01J21/06 ,  B01J21/08

Abstract: The invention relates to a catalyst composition suitable for the dehydrogenation of paraffins having 2-8 carbon atoms comprising zinc oxide and titanium dioxide, optionally further comprising oxides of cerium (Ce), dysprosium (Dy), erbium (Er), europium (Eu), gadolinium (Gd), lanthanum (La), neodymium (Nd), praseodymium (Pr), samarium (Sm), terbium (Tb), ytterbium (Yb), yttrium (Y), tungsten (W) and Zirconium (Zr) or mixtures thereof, wherein said catalyst composition is substantially free of chromium and platinum. The catalysts possess unique combinations of activity, selectivity, and stability. Methods for preparing improved dehydrogenation catalysts and a process for dehydrogenating paraffins having 2-8 carbon atoms, comprising contacting the mixed metal oxide catalyst with paraffins are also described. The catalyst may also be disposed on a porous support in an attrition-resistant form and used in a fluidized bed reactor.