发明名称 |
Composite polyamide reverse osmosis membrane and method of producing the same |
摘要 |
A composite polyamide reverse osmosis membrane and method of producing same. In a preferred embodiment, the membrane is made by coating a porous polysulfone support with an aqueous solution containing 2 wt % m-phenylenediamine (MPD), and 0.1 wt % di(ethylene glycol) hexyl methyl ether. Next, the excess solution is removed, and the coated support is dipped in 0.1 wt % organic solvent solution of trimesoyl chloride (TMC) in a mixture of alkanes having from 8 to 12 carbon atoms. After draining the TMC solution off, the resulting composite membrane is air dried and then rinsed in a basic aqueous solution. The resultant membrane exhibits a flux of 21.3 gfd and a salt rejection of 98.9% when used at 225 psi for an aqueous solution containing 2000 ppm of NaCl.
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申请公布号 |
US7479300(B2) |
申请公布日期 |
2009.01.20 |
申请号 |
US20050094562 |
申请日期 |
2005.03.30 |
申请人 |
WOONGJIN CHEMICAL CO., LTD. |
发明人 |
KOO JA-YOUNG;HONG SUNG PYO;LEE JONG HWA;KIM JUN SUK |
分类号 |
B01D5/00;B29C65/00;B29C67/20 |
主分类号 |
B01D5/00 |
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