GB902682A - Process for the manufacture of fluorethylenes - Google Patents

Process for the manufacture of fluorethylenes

Info

Publication number
GB902682A
GB902682A GB4025/59A GB402559A GB902682A GB 902682 A GB902682 A GB 902682A GB 4025/59 A GB4025/59 A GB 4025/59A GB 402559 A GB402559 A GB 402559A GB 902682 A GB902682 A GB 902682A
Authority
GB
United Kingdom
Prior art keywords
pict
reaction zone
iii
tube
section
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
GB4025/59A
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.)
Hoechst AG
Original Assignee
Hoechst AG
Farbwerke Hoechst 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 Hoechst AG, Farbwerke Hoechst AG filed Critical Hoechst AG
Publication of GB902682A publication Critical patent/GB902682A/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
    • C07C17/26—Preparation of halogenated hydrocarbons by reactions involving an increase in the number of carbon atoms in the skeleton
    • C07C17/263—Preparation of halogenated hydrocarbons by reactions involving an increase in the number of carbon atoms in the skeleton by condensation reactions
    • C07C17/269—Preparation of halogenated hydrocarbons by reactions involving an increase in the number of carbon atoms in the skeleton by condensation reactions of only halogenated hydrocarbons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J12/00—Chemical processes in general for reacting gaseous media with gaseous media; Apparatus specially adapted therefor
    • B01J12/005—Chemical processes in general for reacting gaseous media with gaseous media; Apparatus specially adapted therefor carried out at high temperatures, e.g. by pyrolysis
    • 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
    • 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

Landscapes

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

Abstract

<PICT:0902682/III/1> <PICT:0902682/III/2> <PICT:0902682/III/3> <PICT:0902682/III/4> <PICT:0902682/III/5> A chemical reactor for the production of fluorinated ethylenes (see Group IV(b) ) has a reaction zone which is slit-shaped. In the forms of reactor shown, Fig. 1: the tube a is concentric with tube b, forming reaction zone d; c is a heating jacket. The apparatus may be of any cross-section, e.g. circular (Fig. 2), rectangular (Fig. 3) or elliptical; or the reaction zone may be on one side of the inlet tube only, as in Figs. 4 and 5. Specifications 723,715 and 823,998 are referred to.ALSO:<PICT:0902682/IV (b)/1> <PICT:0902682/IV (b)/2> Fluorinated ethylenes are prepared by pyrolysing a compound RCF2Cl, where R is hydrogen, methyl, or halomethyl containing at least one hydrogen atom, in a reaction zone which has a slit-shaped cross-section, and one wall of which is heated, and the opposite wall is cooled by the gaseous starting material flowing along the outer surface of the wall before it enters the reaction zone. In the suitable forms of apparatus shown, the tube a (Fig. 1), which may be of any cross-section, e.g. circular, elliptical or rectangular, is concentric with tube b, which is heated by jacket c; the reaction zone is the space d; or the reaction zone may be on one side of the inlet tube only, as in Fig. 4. A dehydrohalogenation catalyst, such as a platinum metal or an alloy thereof may be used. Specified reactions are the conversion of CHF2Cl to CF2:CF2 at 650-900 DEG C., of CH3CF2Cl to CH2:CF2 at 650-900 DEG C., of CHCl2CF2Cl to CCl2:CF2 at 200-600 DEG C., of CHF2CF2Cl to CF2:CF2 at 600-1000 DEG C., and of CHFClCF2Cl to CFCl:CF2. Specifications 723,715 and 823,998 are referred to.
GB4025/59A 1958-02-06 1959-02-04 Process for the manufacture of fluorethylenes Expired GB902682A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEF0024987 1958-02-06

Publications (1)

Publication Number Publication Date
GB902682A true GB902682A (en) 1962-08-09

Family

ID=7091443

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4025/59A Expired GB902682A (en) 1958-02-06 1959-02-04 Process for the manufacture of fluorethylenes

Country Status (4)

Country Link
US (1) US3183277A (en)
DE (1) DE1068695B (en)
FR (1) FR1216649A (en)
GB (1) GB902682A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004047980A1 (en) * 2002-11-26 2004-06-10 Novácke Chemické Závody, A.S. Device for conditions of chemical technologies and its application
US20150368169A1 (en) * 2007-07-06 2015-12-24 Honeywell International Inc. Preparation of fluorinated olefins via catalytic dehydrohalogenation of halogenated hydrocarbons

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1068695B (en) * 1958-02-06 1959-11-12 Farbwerke Hoechst Aktiengesellschaft vormals Meister Lucius 6. Brüning, Frankfurt/M Process for the preparation of fluoroethylenes
NL129846C (en) * 1962-01-24
US3337645A (en) * 1963-04-05 1967-08-22 Mobil Oil Corp Catalytic conversion of fluorocarbons
US4351805A (en) * 1981-04-06 1982-09-28 International Business Machines Corporation Single gas flow elevated pressure reactor
US4869833A (en) * 1986-04-03 1989-09-26 Vertech Treatment Systems, Inc. Method and apparatus for controlled chemical reactions
US4721575A (en) * 1986-04-03 1988-01-26 Vertech Treatment Systems, Inc. Method and apparatus for controlled chemical reactions
US5024818A (en) * 1990-10-09 1991-06-18 General Motors Corporation Apparatus for forming carbon fibers
US5413773A (en) * 1990-10-09 1995-05-09 General Motors Corporation Method for forming carbon filters
US20020032356A1 (en) * 2000-07-14 2002-03-14 Gelblum Peter Gideon Synthesis of perfluoroolefins
FR2937033B1 (en) * 2008-10-13 2010-10-22 Arkema France PROCESS FOR THE PREPARATION OF VINYLIDENE FLUORIDE

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2551573A (en) * 1945-11-30 1951-05-08 Du Pont Pyrolysis of chloro-fluoro alkanes
US2566807A (en) * 1947-04-23 1951-09-04 American Cyanamid Co Method of preparing chlorofluoroethylenes
US2763532A (en) * 1950-12-18 1956-09-18 Union Oil Co Process for hydrogen cyanide production
DE1068695B (en) * 1958-02-06 1959-11-12 Farbwerke Hoechst Aktiengesellschaft vormals Meister Lucius 6. Brüning, Frankfurt/M Process for the preparation of fluoroethylenes

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004047980A1 (en) * 2002-11-26 2004-06-10 Novácke Chemické Závody, A.S. Device for conditions of chemical technologies and its application
US20150368169A1 (en) * 2007-07-06 2015-12-24 Honeywell International Inc. Preparation of fluorinated olefins via catalytic dehydrohalogenation of halogenated hydrocarbons
US10807925B2 (en) * 2007-07-06 2020-10-20 Honeywell International Inc. Preparation of fluorinated olefins via catalytic dehydrohalogenation of halogenated hydrocarbons

Also Published As

Publication number Publication date
FR1216649A (en) 1960-04-26
US3183277A (en) 1965-05-11
DE1068695B (en) 1959-11-12

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