Process for preparing polyether ether ketone membrane

Details Process for preparing polyether ether ketone membrane Process for preparing polyether ether ketone membrane

B - Operations, Transporting

01

D

B01D 67/00 (2006.01) B01D 71/52 (2006.01) C08J 5/18 (2006.01) C08J 9/28 (2006.01)

Patent

CA 2205301

The present invention is directed to a process for manufacturing a polyether ether ketone (PEEK) membrane which may be used for ultrafiltration or microfiltration at high temperatures. In this process for manufacturing a non-sulfonated PEEK membrane which comprises dissolving PEEK in a solvent to obtain a membrane forming stock solution, forming the stock solution into a desired shape and bringing the formed stock solution in contact with a coagulating liquid capable of coagulating PEEK, the key features involve using concentrated sulfuric acid as the solvent, dissolving PEEK therein to prepare the stock solution and keeping the stock solution at 15 degrees C or lower until initiation of membrane formation.

La présente invention concerne un procédé de préparation d'une membrane en polyéther éther cétone utilisable comme ultrafiltre ou microfiltre à haute température. Ce procédé consiste à dissoudre un polyéther éther cétone dans un solvant, puis on coule la solution stable ainsi obtenue pour que la membrane se constitue avec la forme désirée, et l'on met la matière coulée en contact avec un agent solidifiant pour le polyéther éther cétone afin d'obtenir une membrane faite de cette matière non sulfonée, et ce procédé est caractérisé en ce que le solvant utilisé est de l'acide sulfurique concentré et que la solution stable est maintenue à une température égale ou inférieure à 15 DEG C jusqu'à ce que la membrane commence à se former.

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