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1. (WO2009117851) A PROCESS FOR PRODUCING DIMETHYL ETHER FROM METHANOL

Pub. No.:    WO/2009/117851    International Application No.:    PCT/CN2008/000601
Publication Date: Oct 1, 2009 International Filing Date: Mar 26, 2008
IPC: C07C 41/09
C07C 43/04
B01J 29/08
Applicants: CHINA PETROLEUM & CHEMICAL CORPORATION
中国石油化工股份有限公司
RESEARCH INSTITUTE OF PETROLEUM PROCESSING, SINOPEC
中国石油化工股份有限公司石油化工科学研究院
GUO, Xiangbo
郭湘波
LI, Zheng
李正
LI, Qiang
李强
XIE, Chaogang
谢朝钢
YANG, Keyong
杨克勇
MAO, Anguo
毛安国
CHANG, Xueliang
常学良
ZHU, Genquan
朱根权
Inventors: GUO, Xiangbo
郭湘波
LI, Zheng
李正
LI, Qiang
李强
XIE, Chaogang
谢朝钢
YANG, Keyong
杨克勇
MAO, Anguo
毛安国
CHANG, Xueliang
常学良
ZHU, Genquan
朱根权
Title: A PROCESS FOR PRODUCING DIMETHYL ETHER FROM METHANOL
Abstract:
Disclosed is a process for producing dimethyl ether from methanol, which is characterized in that the absorbing liquid used in said absorbing column is the bottom liquid of DME-fractionating column and/or bottom waste water of the methanol-recovering column. Said process can significantly reduce energy consumption of the apparatus.