Method for separating 1-chloro-3,3,3-trifluoropropene and hydrogen fluoride, and method for producing 1-chloro-3,3,3-trifluoropropene by using same
US-9221732-B2 · Dec 29, 2015 · US
Method for producing perfluoroalkadiene compounds
US11225446B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11225446-B2 |
| Application number | US-202117225598-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 8, 2021 |
| Priority date | Feb 3, 2017 |
| Publication date | Jan 18, 2022 |
| Grant date | Jan 18, 2022 |
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Abstract
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According to a method for producing a perfluoroalkadiene compound represented by general formula (1): CF2═CF—(CF2)n-4—CF═CF2 (1), wherein n is an integer of 4 or more, the method comprising a reaction step of adding a nitrogen-containing compound to a solution of a compound represented by general formula (2): X1CF2—CFX2—(CF2)n-4—CF2—CF2X1 (2), wherein n is the same as above, X1 is the same or different and is a halogen atom other than fluorine, and X2 is a halogen atom, the perfluoroalkadiene compound can be obtained at a high yield.
First claim
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The invention claimed is: 1. A perfluoroalkadiene composition comprising: a perfluoroalkadiene compound represented by general formula (1): CF 2 ═CF—(CF 2 ) n-4 —CF═CF 2 (1) wherein n is an integer of 4 or more, and a fluorine-containing alkene compound having 4 or more carbon atoms, wherein the amount of the fluorine-containing alkene compound is 0.1 to 3 mol % when the total amount of the perfluoroalkadiene composition is 100 mol %. 2. The perfluoroalkadiene composition according to claim 1 , wherein the perfluoroalkadiene compound is hexafluorobutadiene. 3. The perfluoroalkadiene composition according to claim 1 , wherein the fluorine-containing alkene compound is at least one member selected from the group consisting of octafluoro-1-butene, octafluoro-2-butene, heptafluoro-1-butene, and heptafluoro-2-butene. 4. The perfluoroalkadiene composition according to claim 2 , wherein the fluorine-containing alkene compound is at least one member selected from the group consisting of octafluoro-1-butene, octafluoro-2-butene, heptafluoro-1-butene, and heptafluoro-2-butene. 5. An etching gas, a refrigerant, a heat transfer medium, a foaming agent, or a resin monomer, each comprising the perfluoroalkadiene composition according to claim 1 . 6. An etching gas, a refrigerant, a heat transfer medium, a foaming agent, or a resin monomer, each comprising the perfluoroalkadiene composition according to claim 2 . 7. An etching gas, a refrigerant, a heat transfer medium, a foaming agent, or a resin monomer, each comprising the perfluoroalkadiene composition according to claim 3 . 8. An etching gas, a refrigerant, a heat transfer medium, a foaming agent, or a resin monomer, each comprising the perfluoroalkadiene composition according to claim 4 .
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Classifications
Etching, surface-brightening or pickling compositions (for glass C03C15/00, {C03C25/66; for mortars, concrete, artificial or natural stone or ceramics C04B41/5338}; for metallic material C23F, C23G1/00, C25F1/00; {for semi-conductors H10P52/40}) · CPC title
- C07C17/23Primary
by dehalogenation · CPC title
- C07C17/25Primary
by splitting-off hydrogen halides from halogenated hydrocarbons · CPC title
Halogenated dienes · CPC title
containing halogen · CPC title
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- What does patent US11225446B2 cover?
- According to a method for producing a perfluoroalkadiene compound represented by general formula (1): CF2═CF—(CF2)n-4—CF═CF2 (1), wherein n is an integer of 4 or more, the method comprising a reaction step of adding a nitrogen-containing compound to a solution of a compound represented by general formula (2): X1CF2—CFX2—(CF2)n-4—CF2—CF2X1 (2), wherein n is the same as above, X1 is the same or d…
- Who is the assignee on this patent?
- Daikin Ind Ltd
- What technology area does this patent fall under?
- Primary CPC classification C07C17/23. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Jan 18 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).