Separation membrane structure
US-2017296980-A1 · Oct 19, 2017 · US
Separation membrane structure
US10478783B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10478783-B2 |
| Application number | US-201715639070-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 30, 2017 |
| Priority date | Jan 30, 2015 |
| Publication date | Nov 19, 2019 |
| Grant date | Nov 19, 2019 |
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Abstract
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A separation membrane structure comprises a porous support, and a separation membrane formed on the porous support. The separation membrane has an average pore diameter of greater than or equal to 0.32 nm and less than or equal to 0.44 nm. The separation membrane includes addition of at least one of a metal cation or a metal complex that tends to adsorb nitrogen in comparison to methane.
First claim
Opening claim text (preview).
The invention claimed is: 1. A separation membrane structure configured for selective permeation of nitrogen from a mixed gas that contains at least methane and nitrogen, the separation membrane structure comprising: a porous support, a separation membrane formed on the porous support, and having an average pore diameter of greater than or equal to 0.32 nm and less than or equal to 0.44 nm, wherein the separation membrane includes a first material and a second material selected from at least one of (i) a metal cation or (ii) a metal complex, both of which adsorb a greater amount of nitrogen as compared to an amount of methane, the second material being disposed or exposed in a pore or on a surface of the first material, and wherein the metal cation added to the separation membrane is at least one element selected from Sr, Mg, Li, Ba, Ca, Cu, and Fe. 2. The separation membrane structure according to claim 1 , wherein the metal complex added to the separation membrane is a complex that includes at least one element selected from Ti, Fe, Ru, Mo, Co and Sm. 3. The separation membrane structure according to claim 1 , wherein a variation coefficient obtained by dividing a standard deviation of pore diameters of the separation membrane by the average pore diameter is less than or equal to 0.4. 4. The separation membrane structure according to claim 1 , wherein the first material is selected from the group consisting of zeolite, silica and carbon.
Assignees
Inventors
Classifications
containing any type of zeolite · CPC title
containing embedded adsorbents · CPC title
Silicium oxide · CPC title
characterised by the membrane · CPC title
Hydrocarbons · CPC title
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Frequently asked questions
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- What does patent US10478783B2 cover?
- A separation membrane structure comprises a porous support, and a separation membrane formed on the porous support. The separation membrane has an average pore diameter of greater than or equal to 0.32 nm and less than or equal to 0.44 nm. The separation membrane includes addition of at least one of a metal cation or a metal complex that tends to adsorb nitrogen in comparison to methane.
- Who is the assignee on this patent?
- Ngk Insulators Ltd
- What technology area does this patent fall under?
- Primary CPC classification B01D71/022. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Nov 19 2019 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 6 related publications on this page (citations in our corpus or others sharing the same primary CPC).