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US 12,134,068 B2Granted
High free volume membrane for gas separation
AssigneeSaudi Arabian Oil Company
InventorJunyan Yang
Life of this patent
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Abstract
A gas separation membrane, methods of forming the membrane, and methods of using the membrane for gas separation are provided. An exemplary gas separation membrane includes a cellulosic matrix and a polymer of intrinsic microporosity (PIM). The PIM includes chains coupled by a heat-treating under vacuum.
Claims13
A method for forming a gas separation membrane, comprising:
- forming a cellulosic polymer solution;
- forming a polymer of intrinsic microporosity (PIM) solution;
- blending the polymer solution of the cellulosic polymer with the polymer solution of the PIM to form a mixed polymer solution;
- forming a dense film from the mixed polymer solution;
- drying the dense film;
- and
- heat-treating the dense film under heat and vacuum to couple the PIM chains.
4 more elements
A method for removing an acid gas from a natural gas feedstock to form a sweetened natural gas, comprising:
- flowing the natural gas feedstock over a membrane, wherein the membrane comprises:
- a cellulosic matrix;
- and
- a polymer of intrinsic microporosity (PIM), wherein the PIM comprises chains coupled by a heat-treating under vacuum;
- and
- isolating the acid gas in a permeate from the membrane;
- and
- producing the sweetened natural gas in a retentate from the membrane.
5 more elements
Dependencies are inferred from the claim text.