Polyimide blends for gas separation membranes

Details Polyimide blends for gas separation membranes Polyimide blends for gas separation membranes

B - Operations, Transporting

01

D

B01D 71/64 (2006.01) B01D 53/22 (2006.01)

Patent

CA 2500346

The present invention provides a selectively gas permeable membrane that has a superior combination of permeability and selectively. The membrane composition includes a Type 1 copolyimide uniformly blended with a Type 2 copolyimide, which polymers are defined by chemical structure more specifically in this disclosure. The invention also provides a method of using the membrane of the copolyimide blend to separate components of gas mixtures.

La présente invention concerne une membrane perméable aux gaz de manière sélective qui comprend une combinaison supérieure de perméabilité et sélectivité. La composition de la membrane comprend un copolyimide de Type 1 mélangé uniformément à un copolyimide de Type 2, ces polymères ayant la structure chimique décrite plus spécifiquement dans l'invention. L'invention a également pour objet un procédé pour utiliser la membrane faite du mélange de copolyimides pour séparer des composantes de mélanges gazeux.

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