Fine alpha alumina ultrafiltration membranes

Details Fine alpha alumina ultrafiltration membranes Fine alpha alumina ultrafiltration membranes

B - Operations, Transporting

01

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117/88.5

B01D 69/10 (2006.01) B01D 71/02 (2006.01) C04B 41/50 (2006.01) C04B 41/87 (2006.01)

Patent

CA 1336151

Strong and durable ultrafiltration membranes with effective separating layers having average pore sizes at almost any point in the range 10 - 80 nm can be made en- tirely out of alpha alumina by seeding boehmite sols with appropriate seeds, such as very fine alpha alumina with a specific surface area of more than 100 m2/g, gel- ling a thin layer of the sol by contact with a microfil- ter support, drying, and controlled heating of the coat- ed support.

584918

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