公开(公告)号：US20220193653A1

公开(公告)日：2022-06-23

申请号：US17547330

申请日：2021-12-10

申请人： Evonik Operations GmbH

发明人： Johan Anton ,  Michael Grass ,  Johannes Kraft ,  Thomas Schneider ,  Grzegorz Ziomek

IPC分类号： B01J38/04 ,  B01J38/02

摘要： The invention provides a process for regenerating a catalyst used for the hydrogenation of an aromatic species, consisting of several steps. First the system is purged with nitrogen, then air is metered in stepwise, and the addition of nitrogen is subsequently ended until only air is present.

公开(公告)号：US11918989B2

公开(公告)日：2024-03-05

申请号：US17547330

申请日：2021-12-10

申请人： Evonik Operations GmbH

发明人： Johan Anton ,  Michael Grass ,  Johannes Kraft ,  Thomas Schneider ,  Grzegorz Ziomek

IPC分类号： B01J38/04 ,  B01J38/02

CPC分类号： B01J38/04 ,  B01J38/02

摘要： The invention provides a process for regenerating a catalyst used for the hydrogenation of an aromatic species, consisting of several steps. First the system is purged with nitrogen, then air is metered in stepwise, and the addition of nitrogen is subsequently ended until only air is present.