Search International and National Patent Collections

1. (WO2017054317) METHOD FOR PREPARING ETHYLENE GLYCOL BY HYDROLYSING ETHYLENE GLYCOL MONOMETHYL ETHER

Pub. No.:    WO/2017/054317    International Application No.:    PCT/CN2015/096645
Publication Date: Fri Apr 07 01:59:59 CEST 2017 International Filing Date: Wed Dec 09 00:59:59 CET 2015
IPC: C07C 29/10
C07C 29/09
C07C 29/80
C07C 31/20
Applicants: DALIAN INSTITUTE OF CHEMICAL PHYSICS, CHINESE ACADEMY OF SCIENCES
中国科学院大连化学物理研究所
Inventors: NI, Youming
倪友明
ZHU, Wenliang
朱文良
LIU, Yong
刘勇
LIU, Hongchao
刘红超
SHI, Lei
石磊
LIU, Zhongmin
刘中民
Title: METHOD FOR PREPARING ETHYLENE GLYCOL BY HYDROLYSING ETHYLENE GLYCOL MONOMETHYL ETHER
Abstract:
Provided is a method for preparing ethylene glycol by hydrolysing ethylene glycol monomethyl ether. The method comprises passing fresh raw materials, i.e. ethylene glycol monomethyl ether and water, through a reaction zone loaded with a solid acid catalyst and reacting same; separating a mixture after the reaction via a separation system to obtain the target product, i.e. ethylene glycol, by-products, i.e. methyl alcohol, dimethyl ether and ethylene glycol-based derivatives, and unreacted raw materials, i.e. ethylene glycol monomethyl ether and water; then, entering the target product, i.e. ethylene glycol, into a product collection system, entering the by-products, i.e. methyl alcohol and dimethyl ether, into a by-product collection system, and recycling the unreacted raw material, i.e. ethylene glycol monomethyl ether, and the unreacted raw material, i.e. water, and the by-products, i.e. the ethylene glycol-based derivatives, so as to mix same with fresh raw materials, i.e. ethylene glycol monomethyl ether and water, and enter same into the reaction zone for reaction. Provided is a new method for preparing ethylene glycol by hydrolysing ethylene glycol monomethyl ether realised via the above-mentioned process, and in the method, the catalyst has long life and good stability.