Inorganic nanofiltration membrane and its application in the...

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B01D 71/02 (2006.01) C13B 20/16 (2011.01) B01D 61/02 (2006.01) B01D 69/10 (2006.01) C04B 38/00 (2006.01) C04B 41/50 (2006.01)

Patent

CA 2268808

The invention concerns an inorganic nanofiltration membrane with a detachment threshold between 100 and 2000 daltons and comprising: a multi-channel ceramic monolith support consisting of a mixture of Al2O3 and TiO2, a microfiltration membrane separating layer, an ultrafiltration membrane separating layer, preferably consisting of ZrO2, a nanofiltration membrane separating layer, preferably consisting of ZrO2, 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.

L'invention concerne une membrane inorganique de nanofiltration présentant un seuil de coupure compris entre 100 et 2000 daltons et comportant: un support monolithe céramique multicanal composé d'un mélange d'Al2O3 et de TiO2; une couche séparatrice membranaire de microfiltration; une couche séparatrice membranaire d'ultrafiltration, de préférence constituée de ZrO2; une couche séparatrice membranaire de nanofiltration, de préférence constituée de ZrO2 et obtenue par un procédé de type sol-gel. Cette membrane inorganique de nanofiltration est destinée à être utilisée dans l'industrie sucrière, plus particulièrement pour le traitement des effluents salins issus de la régénération des résines échangeuses d'ions employées dans le raffinage du sucre de canne.

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