Inorganic nanofiltration membrane and its application in the sugar industry
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United States of America Patent
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Oct 15, 2002
Grant Date -
May 24, 2001
app pub date -
Dec 19, 2000
filing date -
Oct 21, 1996
priority date (Note) -
Expired
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Abstract
The invention concerns an inorganic nanofiltration membrane with a detachment threshold between 100 and 200 daltons and comprising: a multichannel ceramic monolith support consisting of a mixture of Al.sub.2 O.sub.3 and of TiO.sub.2, a microfiltration membrane separating layer, an ultrafiltration membrane separating layer, preferably consisting of ZrO.sub.2, a nanofiltration membrane separating layer, preferably consisting of ZrO.sub.2, and obtained by a sol-gel type method. This inorganic nanofiltration membrane is designed for use in the sugar industry, more particularly for treating saline effluents derived from the regeneration of ion exchanging resins used if the refining of cane sugar.
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