Monolayer, composite, gas separation material, filter, gas separation device and method for manufacturing composite
US-12128366-B2 · Oct 29, 2024 · US
Gas separation membrane module and gas separation method
US9718023B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9718023-B2 |
| Application number | US-201113288095-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 3, 2011 |
| Priority date | Nov 4, 2010 |
| Publication date | Aug 1, 2017 |
| Grant date | Aug 1, 2017 |
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Abstract
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A process for producing nitrogen-rich air by feeding high temperature air at 150° C. or more to an air separation membrane module is described. After being placed at 175° C. for two hours, the air separation module exhibits a shape-retention ratio of 95% or more in one embodiment. The nitrogen-rich air can be fed to a fuel tank for an aircraft, for example.
First claim
Opening claim text (preview).
The invention claimed is: 1. A process for producing nitrogen-rich air from the air using an air separation membrane module including an air separation membrane, the process comprising feeding the air at 175° C. or higher to the air separation membrane, wherein the air separation membrane in the air separation membrane module comprises a material having no glass-transition temperature at 300° C. or lower, wherein for the air separation membrane module, at the initiation of the use, an oxygen-gas permeation rate (P′ O2 ) at 175° C. is 20×10 −5 cm 3 (STP)/cm 2 ·sec ·cmHg or more and a ratio of an oxygen-gas permeation rate to a nitrogen-gas permeation rate (P′ O2 /P′ N2 )at 175° C. is 1.8 or more; and after the use at 175° C. for 140 hours, P′ O2 and P′ O2 /P′ N2 are retained in levels of 90% or more of P′ O2 and P′ O2 /P′ N2 before the initiation of the use, respectively. 2. A process for producing nitrogen-rich air from the air using an air separation membrane module including an air separation membrane, the process comprising feeding the air at 175° C. or higher to the air separation membrane, wherein the air separation membrane in the air separation membrane module comprises a material having no glass-transition temperature at 300° C. or lower, wherein after being placed at 175° C. for 2 hours, the air separation membrane exhibits a shape-retention ratio of 95% or more. 3. A method for explosion protection of an aircraft, comprising producing nitrogen-rich air by the production process as claimed in claim 1 and feeding the nitrogen-rich air to a fuel tank for an aircraft. 4. A method for explosion protection of an aircraft, comprising producing nitrogen-rich air by the production process as claimed in claim 2 and feeding the nitrogen-rich air to a fuel tank for an aircraft. 5. The process according to claim 1 , wherein the material having no glass-transition temperature at 300° C. or lower in the air separation membrane comprises polyimide. 6. The process according to claim 2 , wherein the material having no glass-transition temperature at 300° C. or lower in the air separation membrane comprises polyimide.
Assignees
Inventors
Classifications
- B01D53/228Primary
characterised by specific membranes · CPC title
Use of sweep gas · CPC title
Elements in parallel · CPC title
with hollow fibres · CPC title
Specific permeability or cut-off range · CPC title
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Frequently asked questions
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- What does patent US9718023B2 cover?
- A process for producing nitrogen-rich air by feeding high temperature air at 150° C. or more to an air separation membrane module is described. After being placed at 175° C. for two hours, the air separation module exhibits a shape-retention ratio of 95% or more in one embodiment. The nitrogen-rich air can be fed to a fuel tank for an aircraft, for example.
- Who is the assignee on this patent?
- Kanetsuki Yutaka, Tanihara Nozomu, Nakamura Tomohide, and 1 more
- 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 01 2017 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).