GB681067A - Process for the production of fluorine-containing olefins - Google Patents
Process for the production of fluorine-containing olefinsInfo
- Publication number
- GB681067A GB681067A GB5283/51A GB528351A GB681067A GB 681067 A GB681067 A GB 681067A GB 5283/51 A GB5283/51 A GB 5283/51A GB 528351 A GB528351 A GB 528351A GB 681067 A GB681067 A GB 681067A
- Authority
- GB
- United Kingdom
- Prior art keywords
- amalgam
- sodium
- reacted
- per cent
- ethane
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C17/00—Preparation of halogenated hydrocarbons
- C07C17/23—Preparation of halogenated hydrocarbons by dehalogenation
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Olefinic fluorides are made by treating alkyl fluorides containing at least one fluorine atom per molecule and at least one chlorine atom at each of two adjacent carbon atoms, with an alkali metal amalgam in an alcoholic medium. Methanol and ethanol are specified alcohols and water may advantageously be present, e.g. in amounts of about 5-60 per cent with an optimum at 30 per cent. Sodium or potassium amalgam may be used although preferably the amalgam is formed by the electrolysis of a solution of an alkali-metal chloride in an electrolytic cell with a mercury cathode and the alkyl fluoride reacted directly therewith. Alkali metal hydroxide formed during reaction may be neutralized with acid, e.g. hydrogen chloride. In examples: (1) trifluorotrichloro-ethane in 70 per cent methanol is reacted with sodium or potassium amalgam to yield chloro-trifluoroethylene; (2) 1,2,2-trichloro-2-fluoro-ethane in alcohol is reacted with sodium amalgam to yield 2-chloro-2-fluoro-ethylene; (3) tetrafluoro-dichloro-ethane in 70 per cent methanol is reacted with sodium amalgam to yield tetrafluoro-ethyl, and (4) is a repeat of (1) using sodium amalgam obtained by the electrolysis of aqueous sodium chloride.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE681067X | 1950-03-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB681067A true GB681067A (en) | 1952-10-15 |
Family
ID=6596435
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5283/51A Expired GB681067A (en) | 1950-03-03 | 1951-03-05 | Process for the production of fluorine-containing olefins |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR1033380A (en) |
GB (1) | GB681067A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2165241A (en) * | 1984-10-03 | 1986-04-09 | Ici Plc | Preparing vinylidene fluoride |
US4745237A (en) * | 1984-06-14 | 1988-05-17 | Imperial Chemical Industries Plc | Preparation of 1-chloro-1,2,2,2-tetrafluoroethane |
-
1951
- 1951-03-03 FR FR1033380D patent/FR1033380A/en not_active Expired
- 1951-03-05 GB GB5283/51A patent/GB681067A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4745237A (en) * | 1984-06-14 | 1988-05-17 | Imperial Chemical Industries Plc | Preparation of 1-chloro-1,2,2,2-tetrafluoroethane |
GB2165241A (en) * | 1984-10-03 | 1986-04-09 | Ici Plc | Preparing vinylidene fluoride |
Also Published As
Publication number | Publication date |
---|---|
FR1033380A (en) | 1953-07-10 |
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