Method for preparing polyurethane-imide permeable vaporizing aromatic/alkane separating membrane |
Title： |
| Method for preparing polyurethane-imide permeable vaporizing aromatic/alkane separating membrane |
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Application Number： |
200710118480 |
Application Date： |
2007/07/06 |
Announcement Date： |
2008/02/13 |
Pub. Date： |
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Publication Number： |
101121101 |
Announcement Number： |
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Grant Date： |
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Granted Pub. Date： |
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ApplicationType： |
Invention |
State/Country： |
11[China|beijing] |
IPC： |
B01D 71/64, C07C 7/00 |
Applicant(s)： |
Tsinghua University |
Inventor(s)： |
Li Jiding, Ye Hong, Chen Jian, Lin Yangzheng |
Key Words： |
preparing method, polyurethane-imide, permeable vaporizing, aromatic, alkane, separating membrane |
Abstract： |
A preparation method of a polyurethane-imide infiltrated and vaporized aromatic hydrocarbon and alkane separation membrane belongs to the infiltrated and vaporized membrane separation technical field. The factors of the prior polyurethanes membrane separation is low, and a plurality of the prior polyurethanes membrane separations need a test of an infiltrated and vaporized separation performance at high temperature. The present invention includes firstly a prepolymer synthesis of polyurethane and imide is that under the conditions of a nitrogen protection, a mechanical mixing and a condensation circumfluence, a terminated prepolymer is obtained by a reaction of poly (ethylene adipate) glycol diol and diisocyanate, and pyromellitic dianhydride is added for a chain extension to obtain the polyurethane-imide prepolymer solution; secondly the preparation of a polyurethane-imide membrane is that the solution casts to form the membrane and an impregnant is volatilized under an infrared light, and the preparation of membrane can be finished after a heat treatment of 150 DEG C for 1.5 to 2 hours. The material synthesis and the membrane-preparation process of the present invention are simple, and the prepared membrane has a good thermal and chemical stability, and the prepared membrane can separate an aromatic hydrocarbon and alkane mixture under a proper temperature condition with a good separation effect as well as with a considerable practical value. |
Claim： |
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PCT： |
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