GB681067A - Process for the production of fluorine-containing olefins - Google Patents

Process for the production of fluorine-containing olefins

Info

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
Application number
GB5283/51A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bayer AG
Original Assignee
Bayer AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Bayer AG filed Critical Bayer AG
Publication of GB681067A publication Critical patent/GB681067A/en
Expired legal-status Critical Current

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.
GB5283/51A 1950-03-03 1951-03-05 Process for the production of fluorine-containing olefins Expired GB681067A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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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