Multi-layer composite gas separation membranes, methods for preparation, and use
AssigneeSaudi Arabian Oil Company
InventorsGarba Oloriegbe Yahaya, Seung-Hak Choi, Ahmad Bahamdan
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Abstract
Methods and systems for producing and using multi-layer composite co-polyimide membranes, one method for producing including preparing a microporous or mesoporous membrane support material for coating; applying a sealing layer to the membrane support material to prevent intrusion into the membrane support material of co-polyimide polymer; applying a first permselective co-polyimide layer atop and in contact with the sealing layer; and applying a second permselective co-polyimide layer atop and in contact with the first permselective co-polyimide layer.
Claims20
A method for producing a multi-layer composite co-polyimide membrane, the method comprising the steps of:
- preparing a microporous or mesoporous membrane support material for coating;
- applying a sealing layer to the membrane support material to prevent intrusion into the membrane support material of a co-polyimide polymer;
- applying a first permselective co-polyimide layer comprising the co-polyimide polymer, the co-polyimide polymer comprising block (6FDA-CARDO)/(6FDA-durene) atop and in contact with the sealing layer;
- and
- applying a second permselective co-polyimide layer comprising block (6FDA-CARDO)/(6FDA-durene) atop and in contact with the first permselective co-polyimide layer.
Dependencies are inferred from the claim text.