GAS SEPARATION COMPOSITE MEMBRANE, METHOD OF PRODUCING THE SAME, GAS SEPARATING MODULE USING THE SAME, AND GAS SEPARATION APPARATUS AND GAS SEPARATION METHOD

A GAS SEPARATION COMPOSITE MEMBRANE, CONTAINING: A GAS-PERMEABLE SUPPORTING LAYER; AND A GAS SEPARATING LAYER CONTAINING A CROSSLINKED POLYIMIDE RESIN, OVER THE GAS-PERMEABLE SUPPORTING LAYER, IN WHICH THE CROSSLINKED POLYIMIDE RESIN IS COMPOSED OF A POLYIMIDE COMPOUND HAVING BEEN CROSSLINKED THROUGH AN ESTER LINKING GROUP, IN WHICH THE POLYIMIDE COMPOUND CONTAINS A REPEATING UNIT OF FORMULA (I), A REPEATING UNIT OF FORMULA (II-A) OR (II-B), AND A REPEATING UNIT OF FORMULA (III-A) OR (III-B), AND IN WHICH A RATIO [K] OF A SITE FORMING A CROSSLINKED CHAIN MEDIATED BY THE ESTER LINKING GROUP TO AN IMIDE GROUP (THE NUMBER OF SPECIFIC CROSSLINKABLE SITES/THE NUMBER OF IMIDE GROUPS) IS MORE THAN 0.4 AND LESS THAN 0.5. FIG. 1