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US 12,091,625 B2Granted
CO2-philic crosslinked polyethylene glycol-based membranes for acid and sour gas separations
AssigneeSaudi Arabian Oil Company
InventorsBenjamin James Sundell, John Alden Lawrence, III, Seth A. Sharber, Sibo Lin, Daniel J. Harrigan
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Abstract
This disclosure relates to CO2-philic crosslinked polyethylene glycol membranes useful for natural gas purification processes. Also provided are methods of using the membranes to remove CO2 and H2S from natural gas.
Claims12
A method of preparing a CO2-philic membrane, comprising:
- reacting a PEG acrylate compound with a melamine-based crosslinker in the presence of a photocrosslinking initiator;
- and
- curing the resulting mixture under UV irradiation to form a membrane.
A method of preparing a CO2-philic membrane, comprising:
- reacting a PEG azide compound with a melamine-based crosslinker in the presence of a copper catalyst;
- and
- drying the resulting mixture to form a membrane.
A method of separating CO2 and H2S from natural gas, comprising:
- providing a CO2-philic membrane comprising a CO2-philic polyethylene glycol (PEG) compound of Formula (I):
- wherein:
- R is selected from:
- each n is independently an integer between 1 and 100;
- and
- each m is independently an integer between 1 and 100;
- introducing a natural gas stream to the membrane;
- and
- removing CO2 and H2S from the natural gas.
6 more elements
Dependencies are inferred from the claim text.