1, 3-butadiene separating material, and separation method using said separating material
US-9856190-B2 · Jan 2, 2018 · US
Method for separating straight-chain conjugated diene
US9944576B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9944576-B2 |
| Application number | US-201515537063-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 30, 2015 |
| Priority date | Dec 19, 2014 |
| Publication date | Apr 17, 2018 |
| Grant date | Apr 17, 2018 |
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Abstract
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The present invention provides a method for selectively separating a straight-chain conjugated diene with high purity from a mixture containing the straight-chain conjugated diene and at least one type of straight-chain olefin. The method involves separating the straight-chain conjugated diene from the mixture containing the straight-chain conjugated diene and the straight-chain olefin using a zeolite membrane composite. The composite contains a porous support and a zeolite layer formed on the surface and in the fine pores of the support, and the zeolite contains an alkali metal cation.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for separating a straight-chain conjugated diene comprising separating the straight-chain conjugated diene from a mixture of the straight-chain conjugated diene and at least one type of straight-chain olefin using a zeolite membrane composite comprising a porous support and a zeolite layer formed on the surface and in fine pores of the support wherein the zeolite comprises an alkali metal as a cation. 2. The method for separating a straight-chain conjugated diene according to claim 1 wherein the zeolite comprises a faujasite type zeolite. 3. The method for separating a straight-chain conjugated diene according to claim 1 wherein the alkali metal is at least one type selected from Na, K, Rb and Cs. 4. The method for separating a straight-chain conjugated diene according to claim 1 wherein the alkali metal consists of Na and Cs. 5. The method for separating a straight-chain conjugated diene according to claim 1 wherein the Cs/Na molar ratio of the alkali metal is from 0.1 to 1.5 mol/mol. 6. The method for separating a straight-chain conjugated diene according to claim 1 wherein the straight-chain conjugated diene is butadiene. 7. The method for separating a straight-chain conjugated diene according to claim 1 wherein the zeolite membrane composite has a 1,3-butadine/1-butene separation coefficient of 1.4 or greater at 60° C. 8. The method for separating a straight-chain conjugated diene according to claim 1 wherein the faujasite type zeolite is a Y-type zeolite. 9. The method for separating a straight-chain conjugated diene according to claim 1 wherein the separation is carried out in coexistence of an inorganic gas with the mixture. 10. The method for separating a straight-chain conjugated diene according to claim 9 wherein the inorganic gas is at least one type selected from helium, argon, nitrogen, hydrogen, carbon monoxide, carbon dioxide and oxygen.
Assignees
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Classifications
by molecular-sieve technique · CPC title
Molecular sieves (carbon B01D71/021) · CPC title
Type X {(C01B39/205 takes precedence)} · CPC title
Supported membranes; Membrane supports · CPC title
Composite membranes; Ultra-thin membranes · CPC title
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- What does patent US9944576B2 cover?
- The present invention provides a method for selectively separating a straight-chain conjugated diene with high purity from a mixture containing the straight-chain conjugated diene and at least one type of straight-chain olefin. The method involves separating the straight-chain conjugated diene from the mixture containing the straight-chain conjugated diene and the straight-chain olefin using a …
- Who is the assignee on this patent?
- Univ Waseda, Jxtg Nippon Oil & Energy Corp
- What technology area does this patent fall under?
- Primary CPC classification C07C7/144. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Apr 17 2018 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 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).