Separation film for separating methanol/methyl-carbonate azotrope
Title：
Separation film for separating methanol/methyl-carbonate azotrope
Application Number：
 200710064633
Application Date：
 2007/03/21
Announcement Date：
 2007/11/14
Pub. Date：
Publication Number：
 101069823
Announcement Number：
Grant Date：
Granted Pub. Date：
ApplicationType：
 Invention
State/Country：
 11[China|beijing]
IPC：
 B01D 71/38C07C 29/74C07C 68/08C07C 69/96C07C 31/04
Applicant(s)：
 Tsinghua Univ.
Inventor(s)：
 Li Jiding, Wang Luying, Lin Yangzheng, Chen Cuixian
Key Words：
 Separation film, methanol, methyl-carbonate, azotrope
Abstract：
 The present invention discloses a separation membrane for separating methyl alcohol/dimethyl carbonate azeotropic mixture and its preparation method, belonging to the field of methyl alcohol separation technology. Said separation membrane is a pervaporation membrane, the polyvinyl alcohol and polyacrylic acid are blended according to the mass ratio of 95/5-85/5, the glutaric dialdehyde can be used as cross-linking agent, and the mass ratio of polyvinyl alcohol and glutaric dialdehyde is 94/6-83/17. Its preparation method includes the following steps: firstly preparing membrane-casting liquor, on the bottom membrane (can be polyacrylonitrile bottom membrane, polysulfone bottom membrane or polyether sulfone bottom membrane) knife-coating a layer of membrane-casting liquor, drying and removing solvent to obtain composite membrane, making thermal treatment so as to obtain the invented pervaporation membrane for separating methyl alcohol/dimethyl carbonate azeotropic liquor.
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