GB1039468A - Improvements in and relating to the preparation of vinylidene fluoride - Google Patents

Improvements in and relating to the preparation of vinylidene fluoride

Info

Publication number
GB1039468A
GB1039468A GB28894/63A GB2889463A GB1039468A GB 1039468 A GB1039468 A GB 1039468A GB 28894/63 A GB28894/63 A GB 28894/63A GB 2889463 A GB2889463 A GB 2889463A GB 1039468 A GB1039468 A GB 1039468A
Authority
GB
United Kingdom
Prior art keywords
vinylidene fluoride
difluoroethane
temperature
bromodifluoroethane
bromo
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
GB28894/63A
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.)
Produits Chimiques Pechiney Saint Gobain
Original Assignee
Produits Chimiques Pechiney Saint Gobain
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 Produits Chimiques Pechiney Saint Gobain filed Critical Produits Chimiques Pechiney Saint Gobain
Publication of GB1039468A publication Critical patent/GB1039468A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C21/00—Acyclic unsaturated compounds containing halogen atoms
    • C07C21/02—Acyclic unsaturated compounds containing halogen atoms containing carbon-to-carbon double bonds
    • C07C21/18—Acyclic unsaturated compounds containing halogen atoms containing carbon-to-carbon double bonds containing fluorine
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C17/00—Preparation of halogenated hydrocarbons
    • C07C17/25—Preparation of halogenated hydrocarbons by splitting-off hydrogen halides from halogenated hydrocarbons
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/50—Improvements relating to the production of bulk chemicals
    • Y02P20/582—Recycling of unreacted starting or intermediate materials

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Vinylidene fluoride is prepared by heating a bromo-1,1-difluoroethane to a temperature below 600 DEG C., preferably fron 500 DEG to 550 DEG C., maintaining the bromodifluoroethane at this temperature for a period of time below 60 seconds preferably between 5 and 30 seconds, and under a pressure which is near to atmospheric pressure, the vinylidene fluoride product being separated by conventional procedures. The bromo-1,1-difluoroethane may be prepared in situ by reacting together bromine and 1,1-difluoroethane in a molar ratio of slightly less than 1:1 at a temperature of from 350 DEG to 500 DEG C., the bromodifluoroethane being subsequently pyrolysed in the same or in a separate vessel. Examples are given. Comparative examples describe the pyrolysis of 1-chloro-1,1-difluoroethane to produce vinylidene fluoride and 1-chloro-1-fluoroethylene.
GB28894/63A 1962-07-25 1963-07-22 Improvements in and relating to the preparation of vinylidene fluoride Expired GB1039468A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR905056A FR1337360A (en) 1962-07-25 1962-07-25 Process for obtaining vinylidene fluoride

Publications (1)

Publication Number Publication Date
GB1039468A true GB1039468A (en) 1966-08-17

Family

ID=8783915

Family Applications (1)

Application Number Title Priority Date Filing Date
GB28894/63A Expired GB1039468A (en) 1962-07-25 1963-07-22 Improvements in and relating to the preparation of vinylidene fluoride

Country Status (6)

Country Link
BE (1) BE635445A (en)
DE (1) DE1215690B (en)
FR (1) FR1337360A (en)
GB (1) GB1039468A (en)
LU (1) LU44110A1 (en)
NL (1) NL295659A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1198441A1 (en) * 1999-07-21 2002-04-24 Halocarbon Products Corporation Production of aliphatic fluorocarbons

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3621067A (en) * 1969-07-23 1971-11-16 Atlantic Richfield Co Vinyl fluoride from 1-fluoro-2-chloroethane by pyrolysis in the presence of bromine
DE2625470A1 (en) * 1976-06-05 1977-12-15 Dynamit Nobel Ag PROCESS FOR THE PRODUCTION OF 1,1-DIFLUORAETHYLENE
KR102610983B1 (en) 2021-11-25 2023-12-06 한국화학연구원 Apparatus and method for manufacturing high-purity vinylidene fluoride
KR102610981B1 (en) 2021-11-25 2023-12-06 한국화학연구원 Apparatus and method for manufacturing vinylidene fluoride

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT179289B (en) * 1951-11-20 1954-08-10 Wacker Chemie Ges Mit Beschrae Process for the production of halofluoroethenes
US2894043A (en) * 1956-02-16 1959-07-07 Monsanto Chemicals Preparation of vinylidene chlorofluoride

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1198441A1 (en) * 1999-07-21 2002-04-24 Halocarbon Products Corporation Production of aliphatic fluorocarbons
EP1198441A4 (en) * 1999-07-21 2003-01-22 Halocarbon Prod Corp Production of aliphatic fluorocarbons

Also Published As

Publication number Publication date
FR1337360A (en) 1963-09-13
BE635445A (en) 1964-01-27
NL295659A (en) 1965-05-10
LU44110A1 (en) 1964-01-22
DE1215690B (en) 1966-05-05

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