发明名称 |
Filtration membrane with calcined alpha-alumina particles therein |
摘要 |
<p>A filtration membrane for micro- or ultra-filtration is formed from a complex of PVDF and calcined alpha -alumina (" alpha -Al") particles, in which complex the particles are reacted and dispersed. The suspended complex is then mixed with a hydrophilic polymer such as polyvinyl alcohol (40%-90% hydrolyzed) referred to herein as HPVA, which reacts with the complex imparting hydrophilicity to the polymer. The novel membrane provides about 50% higher specific flux than a membrane made with the same polymer but without the alpha -Al particles. Unexpectedly, the net flux is improved by treating the membrane with a solution of sodium hypochlorite which fails to remove the HPVA from the novel membrane but does remove it from the prior art membrane which does not contain the alpha -Al. The preferred membrane comprises a macroporous support coated on its outer surface with a thin tubular asymmetric semipermeable film of polymer containing less than about 50% by weight of alpha -Al particles.</p> |
申请公布号 |
AU736957(B2) |
申请公布日期 |
2001.08.09 |
申请号 |
AU19980080966 |
申请日期 |
1998.06.29 |
申请人 |
ZENON ENVIRONMENTAL INC. |
发明人 |
MAILVAGANAM MAHENDRAN;KENNETH PAUL GOODBOY;JINHUA BAI |
分类号 |
B01D67/00;B01D69/08;B01D69/10;B01D69/14;B01D71/34;C08K9/02;(IPC1-7):B01D69/08;B01D61/14 |
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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