Patent ID: 7344585

Claim:
A multi-component membrane for the separation of gases, the membrane comprising a mixture of silicone rubber, zeolite particles and a nitrogen containing compound on a cellulose acetate porous support media wherein said nitrogen containing compound is of a general formula: NR 1 R 2 R 3 wherein R 1 , R 2 and R 3 may independently one or more of the following groups: C 1 -C 50 -alkyl, C 3 -C 50 -cycloalkyl, aromatic, alkyl substituted aromatic, such as C 1 -C 50 -alkyl substituted aromatic, aromatic substituted aliphatic moieties such as C 1 -C 50 -alkylene moieties substituted with one or more aromatic groups, C 1 -C 50 -hydroxyalkyl, amino- and/or hydroxyl-substituted C 1 -C 50 -alkyl, alkoxyalkyl such as C 2 -C 50 -alkoxyalkyl, dialkylaminoalkyl such as C 3 -C 50 -dialkylaminoalkyl, alkylaminoalkyl such as C 2 -C 50 -alkylaminoalkyl, heterocyclic, aromatic heterocyclic, alkyl substituted heterocyclic and alkyl substituted aromatic heterocyclic, such as C 1 -C 50 -alkyl substituted heterocyclic and aromatic heterocyclic compounds, and heterocyclic substituted aliphatic moieties such as C 1 -C 50 -alkylene moieties substituted with one or more aromatic groups and R 1 and R 2 may independently be hydrogen and R 1 and R 2 may form, with the nitrogen atom, a nitrogen-containing heterocycle, aromatic heterocycle, alkyl substituted heterocycle or alkyl substituted aromatic heterocycle, with the proviso that when R 3 is alkyl and R 1 and R 2 are independently hydrogen then R 3 is C 4 -C 50 -alkyl.