Composite Membrane and Method of Separating Gas Using the Same
US-2019321787-A1 · Oct 24, 2019 · US
High free volume membrane for gas separation
US11717787B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11717787-B2 |
| Application number | US-202117140395-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 4, 2021 |
| Priority date | Jan 4, 2021 |
| Publication date | Aug 8, 2023 |
| Grant date | Aug 8, 2023 |
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- Title
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- Abstract
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Abstract
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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.
First claim
Opening claim text (preview).
What is claimed is: 1. A gas separation membrane, comprising: a cellulosic matrix; and a polymer of intrinsic microporosity (PIM), wherein the PIM comprises chains coupled by a heat-treating under vacuum. 2. The gas separation membrane of claim 1 , wherein the cellulosic matrix comprises cellulose acetate (CA). 3. The gas separation membrane of claim 1 , wherein the cellulosic matrix comprises cellulose acetate butyrate (CAB). 4. The gas separation membrane of claim 1 , wherein the PIM comprises PIM-1. 5. The gas separation membrane of claim 1 , wherein the PIM comprises triazine rings coupling PIM chains. 6. The gas separation membrane of claim 1 , comprising larger free volume spaces and smaller free volume spaces formed by the heat-treating under vacuum. 7. The gas separation membrane of claim 1 , comprising a CO 2 permeability that is at least 50% higher than the CO 2 permeability of a neat CA membrane. 8. The gas separation membrane of claim 1 , comprising a CO 2 /CH 4 mixed gas selectivity that is within +/−10% of a neat CA membrane. 9. The gas separation membrane of claim 1 , comprising an H 2 S permeability that is at least 50% higher than the H 2 S permeability of a neat CA membrane. 10. The gas separation membrane of claim 1 , comprising an H 2 S/CH 4 mixed gas selectivity that is within +/−10% of a neat CA membrane. 11. The gas separation membrane of claim 1 , comprising between about 2.5 wt. % PIM and about 40 wt. % PIM of an amount of a CA in the membrane. 12. The gas separation membrane of claim 1 , comprising between about 5 wt. % PIM and about 20 wt. % PIM of an amount of a CA in the membrane.
Assignees
Inventors
Classifications
Chemical modification · CPC title
Pretreatment of the casting solutions, e.g. thermal treatment or ageing · CPC title
- B01D53/228Primary
characterised by specific membranes · CPC title
- B01D67/0083Primary
Thermal after-treatment · CPC title
characterised by their properties · CPC title
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Frequently asked questions
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- What does patent US11717787B2 cover?
- 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.
- Who is the assignee on this patent?
- Saudi Arabian Oil Co
- What technology area does this patent fall under?
- Primary CPC classification B01D53/228. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Aug 08 2023 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).