Processes for the production of fluoropropanes and halopropenes
US-RE49849-E · Feb 27, 2024 · US
Process for the production of 2,3,3,3-tetrafluoropropene
US2020407293A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2020407293-A1 |
| Application number | US-201916976819-A |
| Country | US |
| Kind code | A1 |
| Filing date | Mar 4, 2019 |
| Priority date | Mar 7, 2018 |
| Publication date | Dec 31, 2020 |
| Grant date | — |
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Abstract
Official abstract text for this publication.
The present invention relates to a process for producing 2,3,3,3-tetrafluoropropene, comprising the steps of: a) providing a stream A comprising at least one of the compounds selected from the group consisting of 2-chloro-3,3,3-trifluoropropene and 2,3-dichloro-1,1,1-trifluoropropane; b) in a reactor, bringing said stream A into contact with HF in the presence or absence of a fluorination catalyst in order to produce a stream B comprising 2,3,3,3-tetrafluoropropene; characterized in that the electrical conductivity of said stream A provided in step a) is less than 15 mS/cm.
First claim
Opening claim text (preview).
1 . A process for producing 2,3,3,3-tetrafluoropropene, comprising the steps of: a) providing a stream A comprising at least one starting compound selected from the group consisting of 2-chloro-3,3,3-trifluoropropene and 2,3-dichloro-1,1,1-trifluoropropane; b) in a reactor, bringing said stream A into contact with HF in the presence or absence of a catalyst in order to produce a stream B comprising 2,3,3,3-tetrafluoropropene; wherein the electrical conductivity of said stream A provided in step a) is less than 15 mS/cm. 2 . The process as claimed in claim 1 , wherein step b) is carried out in the gas phase in the presence of a catalyst. 3 . The process as claimed in claim 1 , wherein the electrical conductivity of said stream A is less than 10 mS/cm. 4 . The process as claimed in claim 1 , wherein step b) is carried out in the presence of a chromium-based catalyst. 5 . The process as claimed in claim 1 , wherein the catalyst is based on chromium and also comprises a cocatalyst selected from the group consisting of Ni, Zn, Co, Mn and Mg. 6 . The process as claimed in claim 1 , wherein stream A comprises 2-chloro-3,3,3-trifluoropropene, HF and 1,1,1,2,2-pentafluoropropane. 7 . The process as claimed in claim 1 , wherein, in addition to 2,3,3,3-tetrafluoropropene, stream B comprises HF, HCl, 2-chloro-3,3,3-trifluoropropene which has not reacted and 1,1,1,2,2-pentafluoropropane. 8 . The process as claimed in claim 1 , wherein step b) is carried out at a temperature of between 310° C. and 420° C. 9 . The process as claimed in claim 1 , wherein step b) is carried out in the presence of hydrofluoric acid having an electrical conductivity of less than 10 mS/cm.
Assignees
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Classifications
- C07C17/206Primary
the other compound being HX · CPC title
by splitting-off hydrogen halides from halogenated hydrocarbons · CPC title
containing fluorine · CPC title
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Frequently asked questions
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- What does patent US2020407293A1 cover?
- The present invention relates to a process for producing 2,3,3,3-tetrafluoropropene, comprising the steps of: a) providing a stream A comprising at least one of the compounds selected from the group consisting of 2-chloro-3,3,3-trifluoropropene and 2,3-dichloro-1,1,1-trifluoropropane; b) in a reactor, bringing said stream A into contact with HF in the presence or absence of a fluorination catal…
- Who is the assignee on this patent?
- Arkema France
- What technology area does this patent fall under?
- Primary CPC classification C07C17/206. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Thu Dec 31 2020 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). 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).