Ddr zeolite seed crystal, method for producing same, and method for producing ddr zeolite membrane
US-2016361691-A1 · Dec 15, 2016 · US
DDR-type zeolite seed crystal and method for manufacturing DDR-type zeolite membrane
US10987637B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10987637-B2 |
| Application number | US-201715706875-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 18, 2017 |
| Priority date | Mar 31, 2015 |
| Publication date | Apr 27, 2021 |
| Grant date | Apr 27, 2021 |
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- Title
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Abstract
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A DDR-type zeolite seed crystal has an average particle diameter of less than or equal to 0.2 μm, and an average aspect ratio of less than or equal to 1.3.
First claim
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The invention claimed is: 1. A method for manufacturing a DDR-type zeolite membrane comprising the steps of: forming DDR-type zeolite seed crystals by heating a starting material solution containing a nucleus that includes DDR-type zeolite seed crystals for greater than or equal to 24 hours and less than or equal to 92 hours, coating a slurry containing the DDR-type zeolite seed crystals onto a surface of a support, the DDR-type zeolite seed crystals having an average particle diameter of greater than or equal to 0.147 μm and less than or equal to 0.2 μm and an average aspect ratio of greater than or equal to 1.1 and less than or equal to 1.3, and causing crystal growth of the DDR-type zeolite seed crystals, wherein a concentration of the nucleus in the starting material solution is greater than or equal to 0.4 mass % and less than or equal to 3.00 mass %, the starting material solution is heated to greater than or equal to 110 degrees C. and less than or equal to 150 degrees C., an average particle diameter of the nucleus is greater than or equal to 0.100 μm and less than or equal to 0.200 μm; and the DDR-type zeolite membrane has an N 2 permeation amount of equal to or less than 0.0034 L/min·m 2 . 2. The method for manufacturing a DDR-type zeolite membrane according to claim 1 , wherein a concentration of the nucleus in the starting material solution is greater than or equal to 0.5 mass % and less than or equal to 3.00 mass %.
Assignees
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Classifications
Organic support material · CPC title
- B01D71/0281Primary
Zeolites · CPC title
Crystalline silica-polymorphs, e.g. silicalites {dealuminated aluminosilicate zeolites} · CPC title
using at least one organic template directing agent · CPC title
by slurry techniques, e.g. die or slip-casting · CPC title
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- What does patent US10987637B2 cover?
- A DDR-type zeolite seed crystal has an average particle diameter of less than or equal to 0.2 μm, and an average aspect ratio of less than or equal to 1.3.
- 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 Apr 27 2021 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 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).