Novel zeolite
US-2017348679-A1 · Dec 7, 2017 · US
Dehydration method, dehydration apparatus, and membrane structure
US11260348B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11260348-B2 |
| Application number | US-201916703151-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 4, 2019 |
| Priority date | Jun 7, 2017 |
| Publication date | Mar 1, 2022 |
| Grant date | Mar 1, 2022 |
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Abstract
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A dehydration method is a dehydration method for selectively separating water from a mixture that contains water, using a zeolite membrane having an AFX structure, and the method includes a step of supplying the mixture to a supply side space of the zeolite membrane having an AFX structure, and a step of making a pressure difference between the supply side space and a permeation side space of the zeolite membrane having an AFX structure.
First claim
Opening claim text (preview).
The invention claimed is: 1. A dehydration method for selectively separating water from a mixture that contains water, using a zeolite membrane having an AFX structure, the method comprising: a step of supplying the mixture to a supply side space of the zeolite membrane having an AFX structure; and a step of making a pressure difference between the supply side space and a permeation side space of the zeolite membrane having an AFX structure. 2. The dehydration method according to claim 1 , wherein the zeolite membrane having an AFX structure contains at least Si, Al, and O. 3. The dehydration method according to claim 1 , wherein the zeolite membrane having an AFX structure is formed on a porous support. 4. A dehydration apparatus comprising: a separation vessel configured to include a porous support, a zeolite membrane having an AFX structure that is formed on the porous support, and a housing portion that is sectioned into a supply side space of the zeolite membrane having an AFX structure and a permeation side space of the zeolite membrane having an AFX structure; and a pressure changing apparatus configured to increase a pressure in the supply side space and/or reduces a pressure in the permeation side space. 5. The dehydration apparatus according to claim 4 , wherein the zeolite membrane having an AFX structure contains at least Si, Al, and O. 6. The dehydration apparatus according to claim 4 , wherein the zeolite membrane having an AFX structure contains at least a zeolite having an AFX structure. 7. A membrane structure comprising: a support; and a zeolite membrane having an AFX structure, the zeolite membrane being formed on the support, wherein in an X-ray diffraction pattern obtained by irradiation of X-rays to a surface of the zeolite membrane, a peak intensity of a (110) plane is 0.4 times or more and 2 times or less a peak intensity of a (004) plane, and surface roughness (Ra) of the zeolite membrane is 5 μm or less. 8. The membrane structure according to claim 7 , wherein the zeolite membrane contains at least Si, Al, and O. 9. The membrane structure according to claim 8 , wherein a ratio of a substance amount of Si at the surface of the zeolite membrane is higher than a ratio of a substance amount of Si inside the zeolite membrane. 10. The membrane structure according to claim 7 , wherein the zeolite membrane substantially does not contain P. 11. The membrane structure according to claim 7 , wherein a water permeation flux of the zeolite membrane at 50° C. is 1 kg/(m 2 ·h) or more.
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Classifications
Inorganic support material · CPC title
- B01D71/0281Primary
Zeolites · CPC title
Other types characterised by their X-ray diffraction pattern and their defined composition {(C01B39/023, C01B39/026, C01B39/06 take precedence)} · CPC title
Pressure control · CPC title
Water · CPC title
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- What does patent US11260348B2 cover?
- A dehydration method is a dehydration method for selectively separating water from a mixture that contains water, using a zeolite membrane having an AFX structure, and the method includes a step of supplying the mixture to a supply side space of the zeolite membrane having an AFX structure, and a step of making a pressure difference between the supply side space and a permeation side space of t…
- Who is the assignee on this patent?
- Ngk Insulators Ltd
- What technology area does this patent fall under?
- Primary CPC classification B01D71/0281. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Mar 01 2022 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 5 related publications on this page (citations in our corpus or others sharing the same primary CPC).