B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
B01D 71/68 (2006.01) B01D 67/00 (2006.01) B01D 69/08 (2006.01) B01D 71/64 (2006.01) D01D 5/24 (2006.01)
Patent
CA 2136006
Improved asymmetrical microporous hollow fibers incorporating a low molecular weight surfactant and the process for the production of the hollow fibers are disclosed. The hollow fibers have significantly improved flux and rewetting characteristics. The process involves passing a polymeric solution through an outer annulus of die to create an annular stream and a precipitating fluid through the inner orifice of the die creating a stream within the annular stream resulting in hollow fiber formation. The pro- cess further involves incorporating a low molecular weight surfactant into the hollow fibers at any one of several stages during the process.
L'invention se rapporte à des fibres creuses microporeuses asymétriques améliorées comportant un tensioactif de faible masse moléculaire et au procédé de production de ces fibres creuses. Les fibres creuses possédent des caractéristiques largement améliorées de flux et de réhumectage. Le processus consiste à faire passer une solution polymère par un anneau externe de la matrice afin de créer un courant annulaire ainsi qu'un fluide de précipitation par l'orifice interne de la matrice produisant un courant dans le courant annulaire entraînant la formation de fibres creuses. Le procédé consiste également à incorporer un tensioactif de faible masse moléculaire dans les fibres creuses à n'importe laquelle des différentes étapes du procédé.
Andrus Robert G.
Brinda Paul D.
Cosentino Louis C.
Hall Robert T. II
Wenthold Randal M.
Minntech Corporation
Ridout & Maybee Llp
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