CROSSLINKED POLYIMIDE MEMBRANE, METHOD FOR MAKING THE SAME USING ORGANIC TITANATE CATALYSTS TO FACILITATE CROSSLINKING AND METHOD OF USING THE MEMBRANE FOR FLUID SEPARATION

摘要

A method of making a crosslinked polyimide membrane is described. A monoesterified membrane is formed from a monoesterified polyimide polymer. The monoesterified membrane is subjected to transesterification conditions to form a crosslinked membrane. The monoesterified membrane is incorporated with an organic titanate catalyst before or after formation of the monoesterified membrane. A crosslinked polyimide membrane made using the aforementioned method and a method of using the membrane to separate fluids in a fluid mixture, such as methane and carbon dioxide, are also disclosed.