Polyimide asymmetric membrane for desulfurization of gasoline, and preparation method |
Title： |
| Polyimide asymmetric membrane for desulfurization of gasoline, and preparation method |
|
Application Number： |
200610113875 |
Application Date： |
2006/10/20 |
Announcement Date： |
2007/05/09 |
Pub. Date： |
|
Publication Number： |
1958736 |
Announcement Number： |
|
Grant Date： |
|
Granted Pub. Date： |
|
ApplicationType： |
Invention |
State/Country： |
11[China|beijing] |
IPC： |
C10G 31/11, B01D 69/02, B01D 71/40 |
Applicant(s)： |
Tsinghua Univ. |
Inventor(s)： |
Li Jiding, Lin Yangzheng, Ye Hong, Chen Jian, Wang Lihua, Chen Cuixian |
Key Words： |
Polyimide, asymmetric membrane, desulfurization of gasoline, preparation method |
Abstract： |
This invention discloses a method for preparing polyimide asymmetric membrane for desulfurizing gasoline. The asymmetric membrane is composed of a supporting layer of polyester nonwoven fabric and polyimide (ODPA-DMMDA). The molecular structure of polyimide is shown in formula I. The method comprises: preparing membrane-forming solution from N, N-dimethyl acetamide, DMMA and anhydride, filtering, defoaming, standing, evenly distributing onto the supporting layer of polyester nonwoven fabric, standing in air, precipitating to obtain polyimide asymmetric membrane for desulfurizing gasoline. The membrane has such advantages as high usage temperature, high permeation flux and high desulfurization efficiency. This invention finds a suitable polyimide material and a suitable method for preparing membrane, and obtains polyimide asymmetric membrane with high gasoline desulfurization performance. |
Claim： |
|
Priority： |
|
PCT： |
|
LegalStatus： |
|
Relevancy information
