초록 ▼

Aromatic polyimide gas separation membranes of the formula: [Figure] [Figure] [Figure] [Figure] [Figure] or mixtures thereof, －R′－is [Figure] [Figure] [Figure] linear alkylene groups of the formula (CH2)1-3 or mixtures thereof, where －R″is [Figure] [Figure] are independently primary or secondary alk

Aromatic polyimide gas separation membranes of the formula: [Figure] [Figure] [Figure] [Figure] [Figure] or mixtures thereof, －R′－is [Figure] [Figure] [Figure] linear alkylene groups of the formula (CH2)1-3 or mixtures thereof, where －R″is [Figure] [Figure] are independently primary or secondary alkyl groups having 1 to 6 carbon atoms preferably methyl, ethyl, or isopropyl －Z and －Z1 are independently hydrogen or halogens such as iodine, bromine or chlorine preferably chlorine, and where n=0-4.

대표청구항 ▼

A process of separating two or more gases comprising the steps of bringing two or more gases into contact with one side of a permselective membrane which is formed of an aromatic polyimide of the formula: [Figure] [Figure] [Figure] [Figure] [Figure] or mixtures thereof, －R′－is [Figure] [Figure] [Fig

A process of separating two or more gases comprising the steps of bringing two or more gases into contact with one side of a permselective membrane which is formed of an aromatic polyimide of the formula: [Figure] [Figure] [Figure] [Figure] [Figure] or mixtures thereof, －R′－is [Figure] [Figure] [Figure] linear alkylene groups of the formula (CH2)1-3 or mixtures thereof, where －R″－is [Figure] [Figure] are independently primary or secondary alkyl groups having 1 to 6 carbon atoms; －Z and －Z1 are independently hydrogen or halogen, and where n=0-4.