公开(公告)号：US20190338053A1

公开(公告)日：2019-11-07

申请号：US15776379

申请日：2016-11-16

Applicant: BASELL POLYOLEFINE GMBH

Inventor： Erich NEUMANN ,  Sven WOLFRAM ,  Christoph WOLF ,  Juergen MOHRBUTTER ,  Dieter LITTMANN

IPC: C08F2/01 ,  B01J19/24 ,  B01J3/04 ,  C08F10/02

Abstract: A process for polymerizing ethylene to obtain an ethylene-based polymer in a plant, wherein the plant includes a reactor in fluid communication with a recycle connection, wherein the process includes a polymerization phase, a partial shutdown phase, and the steps of reducing the pressure in the reactor for entering into the partial shutdown phase from the polymerization phase; and increasing the pressure in the reactor for exiting from the partial shutdown phase and re-entering the polymerization phase.