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专利标题:
內含經燒之���氧化鋁微粒的過濾膜
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- 专利标题(英):Filtration membrane with calcined -alumina particles therein
- 专利标题(中):内含经烧之���氧化铝微粒的过滤膜
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申请号:TW087110447
申请日:1998-06-29
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公开(公告)号:TW419392B
公开(公告)日:2001-01-21
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发明人:
馬維甘南馬漢德蘭
, 肯尼斯保羅古德布伊
, 金皓貝
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申请人:
興隆環境股份有限公司
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申请人地址:
加拿大
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专利权人:
興隆環境股份有限公司
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当前专利权人:
興隆環境股份有限公司
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当前专利权人地址:
加拿大
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代理人:
鄭自添
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主分类号:
B01D
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IPC分类号:
B01D
摘要:
一種供微型過濾或超過濾用之過濾膜自PVDF和經燒之α氧化鋁(”α-Al”)粒子的絡合物予以形成,在此絡合物中,使各粒子起反應並分散。然後將經懸浮之絡合物與一種親水性聚合物例如本文中稱為HPVA之聚乙烯醇(40%至90%水解)混合,它與該絡合物起反應而將親水性授予聚合物。該新穎薄膜較使用相同聚合物(但不含α-Al粒子)所造成之膜提供大約50%較高之比流量。出人意外,淨流量經由使用次氯酸鈉溶液處理該膜予以改良,其未能自新穎薄膜中移出HPVA,但是卻自不含α-A1之先前技藝中移除它。較佳之膜包含使用以重量計低於大約50%的α-Al粒子之聚合物的薄管式不對稱半滲透膜蓋覆在其外表面上之宏觀多孔載體。
摘要(中):
一种供微型过滤或超过滤用之过滤膜自PVDF和经烧之α氧化铝(”α-Al”)粒子的络合物予以形成,在此络合物中,使各粒子起反应并分散。然后将经悬浮之络合物与一种亲水性聚合物例如本文中称为HPVA之聚乙烯醇(40%至90%水解)混合,它与该络合物起反应而将亲水性授予聚合物。该新颖薄膜较使用相同聚合物(但不含α-Al粒子)所造成之膜提供大约50%较高之比流量。出人意外,净流量经由使用次氯酸钠溶液处理该膜予以改良,其未能自新颖薄膜中移出HPVA,但是却自不含α-A1之先前技艺中移除它。较佳之膜包含使用以重量计低于大约50%的α-Al粒子之聚合物的薄管式不对称半渗透膜盖覆在其外表面上之宏观多孔载体。
摘要(英):
A filtration membrane for micro- or ultra-filtration is formed from a complex of PVDF and calcined -alumina (""-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 -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 from the novel membrane but does remove it from the prior art membrane which does not contain the -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 -Al particles.