公开(公告)号：US20200339495A1

公开(公告)日：2020-10-29

申请号：US16860603

申请日：2020-04-28

申请人： Institute of Coal Chemistry, Chinese Academy of Sciences ,  Shanxi Lu'an Mining (Group) Co., Ltd.

发明人： Weibin FAN ,  Guofu WANG ,  Jiaqi GUO ,  Jianguo WANG ,  Mei DONG ,  Pengfei WANG ,  Youliang CEN ,  Yaning XIAO ,  Dongfei WANG ,  Shoujing SUN ,  Weilin WANG ,  Juncai ZHANG ,  Min ZHANG ,  Yunhong LI

IPC分类号： C07C41/56 ,  C07C41/58 ,  B01J29/40 ,  B01J29/70 ,  B01J4/00 ,  B01J19/18 ,  B01J19/00 ,  B01D69/04 ,  B01D67/00

摘要： The disclosure relates to a process for continuously producing polyoxymethylene dimethyl ethers at low temperature, pertains to the technical field of polyoxymethylene dimethyl ether preparation processes, and solves the technical problem of continuous production of polyoxymethylene dimethyl ether. A membrane separation element with precisely controlled pores in membrane is used to realize a direct separation of the feedstocks from the catalyst within the reactor, and effectively reduce the permeation resistance of the separation membrane tube. By oppositely switching the flowing direction of liquid reaction materials, the adhesion of the catalyst to the separation membrane tube is inhibited, and some particles stuck in separation membrane tube are removed, which ensures the continuous operation of the reaction process and allows a molecular sieve catalyst to exhibit its advantage of long catalytic life.