Gas separation membranes

Details Gas separation membranes Gas separation membranes

B - Operations, Transporting

01

D

B01D 71/68 (2006.01) B01D 53/22 (2006.01) B01D 63/02 (2006.01) B01D 67/00 (2006.01) B01D 69/08 (2006.01) B01D 69/12 (2006.01) B01D 71/70 (2006.01)

Patent

CA 2437539

In the present method of producing composite, hollow fibre gas separation membranes, external surfaces of the porous hollow fibre tubes used in the construction of the membranes are subjected to a modification technique before these external surfaces are coated with a thin layer of selective polymer so as to increase the number of pores in the fibre surface. Also, the present method of treating the external surface of a hollow fibre gas separation tube prior to application of a selective polymer layer to the external surface of the tube, comprises soaking the surface in a solvent which penetrates into pores in the surface, displacing the solvent with water and then drying the fibre tube.

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