发明名称 |
Surfactant treatment of polyaramide gas separation membranes. |
摘要 |
<p>A process for improving the permselectivity of asymmetric polyaramide gas separation membranes is disclosed. The process involves contacting the membrane with a dilute solution of a surfactant in a solvent which preferably swells the membrane material. The surfactants are anionic, nonionic or amphoteric with the fluorinated nonionic surfactants being preferred.</p> |
申请公布号 |
EP0424004(A1) |
申请公布日期 |
1991.04.24 |
申请号 |
EP19900311029 |
申请日期 |
1990.10.09 |
申请人 |
E.I. DU PONT DE NEMOURS AND COMPANY |
发明人 |
HAYES, RICHARD ALLEN |
分类号 |
B01D67/00;B01D69/00;B01D71/56 |
主分类号 |
B01D67/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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