Membranes comprising aminoacid salts in polyamine polymers...

B - Operations – Transporting – 01 – D

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B01D 71/60 (2006.01) B01D 53/22 (2006.01) B01D 67/00 (2006.01) B01D 69/00 (2006.01) B01D 69/14 (2006.01) C08K 5/17 (2006.01) C08K 5/3435 (2006.01)

Patent

CA 2282651

The present invention is directed toward a composition comprising a polyamine or its polymer blend and at at least one salt of an aminoacid, the salt of the aminoacid being present in an amount ranging from about 10 to 80 wt.% based on the total weight of the composition. Another embodiment of the present invention comprises a membrane suitable for use in separating CO2 from gas streams containing CO2, especially H2 rich gas streams containing CO2 and CO. The membrane of this invention with polyamine shows higher CO2 selectivity and permeability than the prior membrane without polyamine.

La présente invention concerne une composition comprenant une polyamine ou son mélange polymère ainsi qu'au moins un sel d'un acide aminé, le sel de l'acide aminé étant présent en une quantité allant d'environ 10 à 80 % en poids, sur la base du poids total de la composition. Un autre mode de réalisation de la présente invention comprend une membrane apte à une utilisation dans la séparation du CO2 de flux gazeux contenant du CO2, notamment de flux gazeux riches en H2 contenant du CO2 et du CO. La membrane de cette invention avec la polyamine présente une sélectivité et une perméabilité au CO2 supérieures à une membrane existante sans polyamine.

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