Gas Purification Method
US-2016272908-A1 · Sep 22, 2016 · US
Separation membrane structure
US10486109B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10486109-B2 |
| Application number | US-201715638976-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 30, 2017 |
| Priority date | Jan 30, 2015 |
| Publication date | Nov 26, 2019 |
| Grant date | Nov 26, 2019 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
A separation membrane structure comprises a porous support, a first separation membrane formed on the porous support, and a second separation membrane formed on the first separation membrane. The first 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 second 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 first 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, a second separation membrane formed on the first separation membrane, and including addition of at least one of a metal cation or a metal complex that tends to adsorb nitrogen in comparison to methane. 2. The separation membrane structure according to claim 1 , wherein an average pore diameter of the second separation membrane is greater than or equal to the average pore diameter of the first separation membrane. 3. The separation membrane structure according to claim 1 , wherein an average pore diameter of the second separation membrane is greater than the average pore diameter of the first separation membrane. 4. The separation membrane structure according to claim 1 , wherein the metal cation added to the second separation membrane is at least one element selected from Sr, Mg, Li, Ba, Ca, Cu, and Fe. 5. The separation membrane structure according to claim 1 , wherein the metal complex added to the second separation membrane is a complex that includes at least one element selected from Ti, Fe, Ru, Mo, Co and Sm. 6. The separation membrane structure according to claim 1 , wherein a variation coefficient obtained by dividing a standard deviation of pore diameters of the first separation membrane by the average pore diameter of the first separation membrane is less than or equal to 0.4.
Assignees
Inventors
Classifications
containing metal, other than zeolites, e.g. oxides, hydroxides, sulphides or salts · CPC title
Methane · CPC title
with more than one layer, e.g. laminates, separated sheets · CPC title
Coatings involving more than one layer of same or different nature · CPC title
Nitrogen · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US10486109B2 cover?
- A separation membrane structure comprises a porous support, a first separation membrane formed on the porous support, and a second separation membrane formed on the first separation membrane. The first 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 second separation membrane includes addition of at least one of a metal…
- Who is the assignee on this patent?
- Ngk Insulators Ltd
- What technology area does this patent fall under?
- Primary CPC classification B01D69/12. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Nov 26 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 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).