Semi permeable membranes

B - Operations – Transporting – 01 – D

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B01D 71/38 (2006.01) B01D 39/14 (2006.01)

Patent

CA 1027721

PRECIS DE LA DIVULGATION : Procédé de traitements de pellicules d'alcool polyviny- lique. Ce procédé consiste à faire subir aux pellicules un trai- tement thermique à sec de durée variable selon la température de traitement et la viscosité de l'alcool polyvinylique employé, puis un traitement dans l'eau chaude a une température supérieure à 90°C et une durée supérieure à 5 minutes. Ce procédé est utilisa- ble notamment pour la préparation de membranes pour le fraction- nement de solutions salines selon la technique de l'osmose inver- se.

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