公开(公告)号：US20190055178A1

公开(公告)日：2019-02-21

申请号：US16101790

申请日：2018-08-13

Applicant: ExxonMobil Research and Engineering Company

Inventor： Brian M. Weiss ,  ChangMin Chun ,  Dhaval A. Bhandari ,  Federico Barrai ,  Sophie Liu

IPC: C07C5/48

Abstract: This disclosure relates to processes, compositions, and systems useful for the oxydehydrogenation of alkanes to form olefins (e.g., for the conversion of ethane to ethylene). The processes use an oxygen transfer agent and may be carried out in any suitable reactor, including a reverse flow reactor, a circulating fluid bed reactor, or a cyclic co-flow reactor.

公开(公告)号：US20220235282A1

公开(公告)日：2022-07-28

申请号：US17643044

申请日：2021-12-07

Applicant: ExxonMobil Research and Engineering Company

Inventor： Brian M. Weiss ,  Sophie Liu ,  Michael R. Harper, JR. ,  Herbert W. Barry ,  Changmin Chun ,  Barrington S. Goldson ,  Justin R. Johnson ,  Faria Nusrat

IPC: C10G11/18 ,  C10G11/12

Abstract: Systems and methods are provided for using a reverse flow reactor (or another reactor with flows in opposing directions at different parts of a process cycle) for pyrolysis of hydrocarbons. The systems and methods can include a reactor that includes a combustion catalyst to initiate and/or maintain combustion within the reactor in a controlled manner during the heating and/or regeneration portion(s) of the reaction cycle. A fuel can also be used that has a greater resistance to auto-combustion, such as a fuel that is composed primarily of methane and/or other hydrocarbons. During operation, the temperature in at least an initial portion of the reactor can be maintained at a temperature so that auto-ignition of the auto-combustion resistant fuel injected during the heating step(s) is reduced or minimized. This can allow combustion to be initiated when the auto-combustion resistant fuel comes into contact with the catalyst. Additionally, the amount and positioning of the catalyst within the reactor can be controlled so that combustion of the fuel takes place over a substantially longer period of time than combustion during a conventional reactor heating step. Because the fuel is moving within the reactor during combustion, extending the combustion time results in a substantial expansion of the volume where combustion occurs. Optionally in combination with an improved reaction cycle, this can expand the portion of the reactor that is directly heated by combustion, allowing for an improved temperature distribution within the reactor during the pyrolysis step.

公开(公告)号：US10662130B2

公开(公告)日：2020-05-26

申请号：US16101790

申请日：2018-08-13

Applicant: ExxonMobil Research and Engineering Company

Inventor： Brian M. Weiss ,  ChangMin Chun ,  Dhaval A. Bhandari ,  Federico Barrai ,  Sophie Liu

IPC: C07C5/48

Abstract: This disclosure relates to processes, compositions, and systems useful for the oxydehydrogenation of alkanes to form olefins (e.g., for the conversion of ethane to ethylene). The processes use an oxygen transfer agent and may be carried out in any suitable reactor, including a reverse flow reactor, a circulating fluid bed reactor, or a cyclic co-flow reactor.

公开(公告)号：US10513475B2

公开(公告)日：2019-12-24

申请号：US15839974

申请日：2017-12-13

Applicant: ExxonMobil Research and Engineering Company

Inventor： Sophie Liu ,  Jihad M. Dakka ,  Partha Nandi ,  Sara Yacob ,  Quddus A. Nizami ,  Chuansheng Bai

IPC: C07C2/86 ,  C07C2/62 ,  C07C29/50 ,  C07C1/24 ,  C07C31/12 ,  C07C31/125 ,  B01J29/70 ,  C07C5/02 ,  C07C29/132 ,  C07C2/12 ,  C07C5/03 ,  C07C5/27 ,  C07C407/00 ,  C10G45/58 ,  C10G50/00 ,  C10G69/12 ,  C10G3/00 ,  B01J29/80 ,  B01J29/50

Abstract: Methods and systems for converting hydrocarbons including exposing a portion of a hydroperoxide-containing feed including tert-butyl hydroperoxide to a solid deperoxidation catalyst under decomposition conditions to form an oxidation effluent comprising tert-butyl alcohol, wherein the solid deperoxidation catalyst comprises a manganese oxide octahedral molecular sieve, are provided herein. Further methods and systems for converting the oxidation effluent to an alkylation product are also provided herein.

公开(公告)号：US20220274085A1

公开(公告)日：2022-09-01

申请号：US17632092

申请日：2020-07-30

Applicant: ExxonMobil Research and Engineering Company

Inventor： Brian M. Weiss ,  Changmin Chun ,  Sophie Liu ,  Federico Barrai ,  Paul F. Keusenkothen ,  Zachary D. Young

IPC: B01J19/24 ,  B01J19/00 ,  B01J4/00 ,  C07C5/48

Abstract: A reverse flow reactor (RFR) and process having a forward reaction feed cycle, a reverse reaction feed cycle, and a reverse regeneration cycle. The heat convected in the forward feed cycle matches the heat convected in the reverse flow cycles. Compared to an RFR without the reverse feed cycle, the three-cycle RPR substantially reduces the regeneration air flow rate, associated compression requirements, and the overall reactor volume, that are required.