Patent ID: 9381472
Filing Date: 2016-07-05
CPC Classification: B01D,C08G,C10L,Y02C,Y02P

Claim Text:
1. A carbon dioxide separation membrane comprising a skin layer having a function of separating carbon dioxide from a mixed gas, wherein the skin layer contains 30 to 90% by mass of a polymer resin in which a difference between an affinity to carbon dioxide and an affinity to at least one of hydrogen and helium, said affinities are expressed as free energy ΔG (kcal mol the polymer resin is a polyamide having at least one of a repeating unit represented by the Formula (I) and a repeating unit represented by Formula (II): in which Ar 3 , Ar 4 and Ar 5 in Formulae (I) and (II) each are at least one group selected from the group consisting of groups represented by Formulae (III) and (IV): in which X, Y and Z in Formula (III) each are at least one group selected from the group consisting of —O—, —CH 2 —, —CO 2 —,—S—, —SO 2 — and —C(CH 3 ) 2 —, and n in Formula (IV) is an integer of from 2 to 8.