Process for the isomerisation of c3-7 (hydro)(halo)fluoroalkenes
US-2016332939-A1 · Nov 17, 2016 · US
Method for preparing metal fluoride catalysts and dehydrofluorination method using the same
US9199225B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9199225-B2 |
| Application number | US-201414475923-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 3, 2014 |
| Priority date | Sep 17, 2013 |
| Publication date | Dec 1, 2015 |
| Grant date | Dec 1, 2015 |
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Abstract
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Disclosed is a method for preparing a metal fluoride catalyst as a dehydrofluorination catalyst having high activity under a mild condition using a trifluoroacetic acid solution with no use of HF gas having fluidity and corrosive property. Disclosed also is a dehydrofluorination method for preparing HFO-1225ye from HFP-236ea by using the catalyst with high efficiency.
First claim
Opening claim text (preview).
What is claimed is: 1. A method for preparing a metal fluoride catalyst, comprising adding a trifluoroacetic acid solution to a metal precursor to form a metal fluoride catalyst, wherein the metal precursor is a chromium oxide wet gel obtained by a sol-gel process; and wherein the trifluoroacetic acid solution has a concentration of 0.001-0.1M. 2. The method for preparing a metal fluoride catalyst according to claim 1 , wherein the trifluoroacetic acid solution is a solution of trifluoroacetic acid dissolved in water, ethanol or dioxane. 3. A dehydrofluorination method comprising: introducing 1,1,2,3,3,3-hexafluoropropane into a reactor; and adding the metal fluoride catalyst obtained by the method as defined in claim 1 to the reactor to obtain 1,2,3,3,3-pentafluoropropene. 4. The dehydrofluorination method according to claim 3 , wherein the reactor has a temperature of 300-500° C. when preparing 1,2,3,3,3-pentafluoropropene. 5. The dehydrofluorination method according to claim 3 , wherein the metal fluoride catalyst is a chromium fluoride catalyst. 6. The method of preparing a metal fluoride catalyst according to claim 1 , wherein the metal fluoride catalyst is defined by Formula 1: CrO x F y , wherein x and y are integers greater than 0.
Assignees
Inventors
Classifications
Fluorides · CPC title
by splitting-off hydrogen halides from halogenated hydrocarbons · CPC title
- B01J27/132Primary
with chromium, molybdenum, tungsten or polonium · CPC title
Fluorinating · CPC title
containing fluorine · CPC title
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- What does patent US9199225B2 cover?
- Disclosed is a method for preparing a metal fluoride catalyst as a dehydrofluorination catalyst having high activity under a mild condition using a trifluoroacetic acid solution with no use of HF gas having fluidity and corrosive property. Disclosed also is a dehydrofluorination method for preparing HFO-1225ye from HFP-236ea by using the catalyst with high efficiency.
- Who is the assignee on this patent?
- Korean Inst Of Science And Technology, Korea Inst Sci & Tech
- What technology area does this patent fall under?
- Primary CPC classification B01J27/132. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Dec 01 2015 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).