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
US11001545B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11001545-B2 |
| Application number | US-201816482856-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 2, 2018 |
| Priority date | Feb 3, 2017 |
| Publication date | May 11, 2021 |
| Grant date | May 11, 2021 |
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.
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—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
Opening claim text (preview).
The invention claimed is: 1. A method for producing 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, the method comprising a reaction step of adding a nitrogen-containing compound to a solution of a compound represented by general formula (2): X 1 CF 2 —CFX 2 —(CF 2 ) n-4 —CF 2 —CF 2 X 1 (2) wherein n is the same as above, X 1 is the same or different and is a halogen atom other than fluorine, and X 2 is chlorine, bromine, or iodine, and heating at reflux temperature. 2. The production method according to claim 1 , wherein the addition rate of the nitrogen-containing compound is 0.001 to 60 mol/h per mol of the compound represented by general formula (2). 3. The production method according to claim 1 , wherein the nitrogen-containing compound is N,N-dimethylformamide. 4. The production method according to claim 1 , wherein the solution is a solution of an organic solvent. 5. The production method according to claim 4 , wherein the boiling point of the organic solvent is lower than the boiling point of the nitrogen-containing compound. 6. The production method according to claim 1 , wherein in the reaction step, the solution of the compound represented by general formula (2) further comprises zinc or a zinc alloy. 7. The production method according to claim 1 , wherein the nitrogen-containing compound is added after the solution of the compound represented by general formula (2) is heated.
Assignees
Inventors
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
Halogenated dienes · CPC title
- C07C17/23Primary
by dehalogenation · CPC title
- C07C17/25Primary
by splitting-off hydrogen halides from halogenated hydrocarbons · CPC title
containing halogen · 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 US11001545B2 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—CF2X1 (2), wherein n is the same as above, X1 is the same or diffe…
- 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 May 11 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).