公开(公告)号：US20200269218A1

公开(公告)日：2020-08-27

申请号：US16797869

申请日：2020-02-21

Applicant: Ascend Performance Materials Operations LLC

Inventor： Y. T. Chi ,  Scott Moffatt ,  John Tjaden ,  Chelsea Lloyd ,  Lori Ables

IPC: B01J23/92 ,  C07C253/24 ,  B01J38/02 ,  B01J23/28

Abstract: The present disclosure relates to a process for stabilizing an antimony ammoxidation catalyst in an ammoxidation process. The process may comprise providing an antimony ammoxidation catalyst to a reactor; reacting propylene with ammonia and oxygen in the fluidized bed reactor in the presence of the antimony ammoxidation catalyst to form a crude acrylonitrile product; and adding an effective amount of an antimony-containing compound to the antimony ammoxidation catalyst to maintain catalyst conversion and selectivity; wherein the antimony-containing compound has a melting point less than 375° C. The present disclosure also relates to catalyst compositions and additional processes using the antimony ammoxidation catalyst stabilized by an antimony-containing compound.

公开(公告)号：US11235313B2

公开(公告)日：2022-02-01

申请号：US16797869

申请日：2020-02-21

Applicant: Ascend Performance Materials Operations LLC

Inventor： Y. T. Chi ,  Scott Moffatt ,  John Tjaden ,  Chelsea Loyd ,  Lori Ables

IPC: B01J23/92 ,  B01J23/28 ,  B01J38/02 ,  C07C253/24

Abstract: The present disclosure relates to a process for stabilizing an antimony ammoxidation catalyst in an ammoxidation process. The process may comprise providing an antimony ammoxidation catalyst to a reactor; reacting propylene with ammonia and oxygen in the fluidized bed reactor in the presence of the antimony ammoxidation catalyst to form a crude acrylonitrile product; and adding an effective amount of an antimony-containing compound to the antimony ammoxidation catalyst to maintain catalyst conversion and selectivity; wherein the antimony-containing compound has a melting point less than 375° C. The present disclosure also relates to catalyst compositions and additional processes using the antimony ammoxidation catalyst stabilized by an antimony-containing compound.

公开(公告)号：US11772081B2

公开(公告)日：2023-10-03

申请号：US17582703

申请日：2022-01-24

Applicant: Ascend Performance Materials Operations LLC

Inventor： Y. T. Chi ,  Scott Moffatt ,  John Tjaden ,  Chelsea Loyd ,  Lori Ables

IPC: B01J23/92 ,  B01J23/28 ,  B01J38/02 ,  C07C253/24

CPC classification number: B01J23/92 ,  B01J23/28 ,  B01J38/02 ,  C07C253/24 ,  C07C2531/34

Abstract: The present disclosure relates to a process for stabilizing an antimony ammoxidation catalyst in an ammoxidation process. The process may comprise providing an antimony ammoxidation catalyst to a reactor; reacting propylene with ammonia and oxygen in the fluidized bed reactor in the presence of the antimony ammoxidation catalyst to form a crude acrylonitrile product; and adding an effective amount of an antimony-containing compound to the antimony ammoxidation catalyst to maintain catalyst conversion and selectivity; wherein the antimony-containing compound has a melting point less than 375° C. The present disclosure also relates to catalyst compositions and additional processes using the antimony ammoxidation catalyst stabilized by an antimony-containing compound.