公开(公告)号：US20220033331A1

公开(公告)日：2022-02-03

申请号：US17277261

申请日：2019-09-10

Applicant: SHELL OIL COMPANY

Inventor： Dionysius Jacobus Maria DE VLIEGER ,  Pieter HUIZENGA ,  Munro MACKAY ,  Lucas Petrus Simon KEYZER ,  Duraisamy MUTHUSAMY

IPC: C07C29/132 ,  B01J23/30 ,  B01J19/00 ,  B01J8/00

Abstract: The invention provides a shut down method for a process for the preparation of glycols from a starting material comprising one or more saccharides in the presence 5 of hydrogen and a catalyst system comprising one or more retro-aldol catalysts comprising tungsten and one or more catalytic species suitable for hydrogenation in a reactor, said method comprising removing the one or more retro-aldol catalysts from the reactor whilst also in the presence of one or more agents suitable to suppress tungsten precipitation.