Crosslinked and crosslinkable hollow fiber membrane and...

Details Crosslinked and crosslinkable hollow fiber membrane and... Crosslinked and crosslinkable hollow fiber membrane and...

B - Operations, Transporting

01

D

B01D 53/22 (2006.01) B01D 67/00 (2006.01) B01D 69/08 (2006.01) B01D 71/64 (2006.01) B01D 71/82 (2006.01)

Patent

CA 2470993

A composition of and a method of making high performance hollow fiber membranes is described. The membranes have a high resistance to plasticization by use of a predetermined amount of crosslinking. The preferred polymer material for the membrane is a polyimide polymer comprising covalently bonded ester crosslinks. The resultant hollow fiber membrane exhibits a high permeability of CO2 in combination with a high CO2/CH4 selectivity. Another embodiment provides a method of making the hollow fiber membrane from a monesterified polymer followed by final crosslinking after hollow fiber formation.

L'invention concerne une composition et un procédé de fabrication de membranes fibres creuses haute performance présentant une haute résistance à la plastification due à un degré de réticulation préétabli. Le matériau polymérique préféré pour la réalisation de la membrane est un polymère polyimide comprenant des ponts ester liés par covalence. La membrane fibre creuse ainsi obtenue présente une grande perméance au CO¿2? combinée à une grande sélectivité du CO¿2?/CH¿4?. Un autre mode de réalisation met en oeuvre un procédé de fabrication de la membrane fibre creuse à partir d'un polymère monoestérifié, la formation de la fibre creuse étant suivie d'une réticulation définitive.

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