EP0000847B1 - Production de chlorure de vinyle monomère - Google Patents

Production de chlorure de vinyle monomère Download PDF

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Publication number
EP0000847B1
EP0000847B1 EP78300280A EP78300280A EP0000847B1 EP 0000847 B1 EP0000847 B1 EP 0000847B1 EP 78300280 A EP78300280 A EP 78300280A EP 78300280 A EP78300280 A EP 78300280A EP 0000847 B1 EP0000847 B1 EP 0000847B1
Authority
EP
European Patent Office
Prior art keywords
dichloroethane
pyrolysis
vinyl chloride
process according
dichloroethanes
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
EP78300280A
Other languages
German (de)
English (en)
Other versions
EP0000847A1 (fr
Inventor
Derek Arthur Burch
Edward John Butler
Clifford William Capp
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.)
BP Chemicals Ltd
Original Assignee
BP Chemicals Ltd
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 BP Chemicals Ltd filed Critical BP Chemicals Ltd
Publication of EP0000847A1 publication Critical patent/EP0000847A1/fr
Application granted granted Critical
Publication of EP0000847B1 publication Critical patent/EP0000847B1/fr
Expired legal-status Critical Current

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Classifications

    • 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

Definitions

  • the present invention relates to an essentially non-catalytic process for the preparation of vinyl chloride by the dehydrochlorination of mixtures of isomeric dichloroethanes.
  • vinyl chloride can be produced by the pyrolytic dehydrochlorination of 1,2-dichloroethane.
  • the process involves the passing of 1,2-dichloroethane through a small diameter reaction tube in which it is heated to elevated temperatures to bring about the dehydrochlorination thereof.
  • it has not hitherto been possible to convert the isomeric 1,1-dichloroethane, which is a byproduct of the pyrolysis of 1,2-dichloroethane, into vinyl chloride in economic yields.
  • US-A-2569923 describes a method of pyrolysing a mixture of 90% 1,1-dichloroethane and 10% 1,2-dichloroethane. However this mixture results only in a 35% conversion.
  • the present invention is a process for producing vinyl chloride comprising pyrolysing at elevated temperature 1,2-dichloroethane mixed with between 0.1 and 10% by weight of 1,1-dichloroethane.
  • the above reaction may be carried out in conventional tubular reactors as normally employed for the pyrolysis of 1,2-dichloroethane.
  • the pyrolysis of mixtures of 1,1-dichloroethane and 1,2-dichloroethane in the specified range of concentrations significantly increases the conversion of 1, i-dichloroethane from about 20% (for the pure isomer) to above 90% (when present in the isomeric mixtures). Both below and above this range the conversion of the 1,2-isomer is depressed relatively.
  • the amount of the 1,1-dichloroethane in the isomeric mixture being pyrolysed is preferably between 1 and 8%.
  • the 1,1-isomer may be mixed with the pyrolysis feed prior to the introduction thereof into the reaction zone. Alternatively it may be incorporated in the pyrolysis feed in the reaction zone itself at the time of pyrolysis.
  • the pyrolysis of the isomeric mixtures may be carried out in packed or unpacked tubular reactors. Where packed reactors are used they may suitably be packed with ceramic spheres.
  • the pyrolysis of the isomeric mixture of dichloroethanes according to the present invention is suitably carried out at a temperature of between 450° and 550°C, preferably between 500° and 535°C.
  • the pyrolysis of the isomeric mixture of dichloroethanes may be carried out at subatmospheric, atmospheric or super-atmospheric pressures. It is, however, preferred to use super- atmospheric pressure, preferably below 35 atmospheres.
  • the pyrolysis of the isomeric mixture of dichloroethanes may be carried out in a continuous manner.
  • the apparatus run at atmospheric pressure, consisted of feed reservoir, metering pump, vaporiser, cracker tube, coolers, organic product receiver, hydrogen chloride scrubbing column, scrub liquor reservoir and wet gas meter. There was also a nitrogen diluent/carrier feed applied to the vaporiser inlet.
  • Feedstocks comprising pure 1,2-dichloroethane (1,2-EDC), 1,2-dichloroethane with up to 10 per cent by weight of 1,1-dich)oroethane (1,1-DCE) and also pure (98.2% by weight) 1,1-DCE were pyrolysed at a peak temperature of 500°C and a contact time of 4.5 seconds under conditions found to give a 50 per cent by weight conversion of pure 1,2-dichloroethane.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)

Claims (7)

1. Procédé essentiellement non catalytique pour produire du chlorure de vinyle par la pyrolyse du 1,2-dichloréthane à température élevee, caractérisé en ce qu'au 1,2-dichloréthane est mélangé de 0,1 à 10% en poids de 1,1-dichloréthane.
2. Procédé selon la revendication 1, caractérisé en ce que la proportion du 1,1-dichloréthane dans le mélange des isomères soumis à la pyrolyse se situe entre 1 et 8% en poids.
3. Procédé selon l'une des revendications 1 et 2, caractérisé en ce que la pyrolyse du mélange des dichloréthanes isomères est effectuée à une température comprise entre 450°C et 550°C.
4. Procédé selon la revendication 3, caractérisé en ce que la pyrolyse du mélange des dichloréthanes isomères est effectuée à une température comprise entre 500° et 535°C.
5. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la pyrolyse du mélange des dichloréthanes isomères est effectuée à des pressions supérieures à la pression atmosphérique.
6. Procédé selon la revendication 5, caractérisé en ce que la pression supérieure à la pression atmosphérique est inférieure à 35 atmosphères.
7. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la pyrolyse du mélange des dichloréthanes isomères est effectuée de façon continue.
EP78300280A 1977-08-16 1978-08-14 Production de chlorure de vinyle monomère Expired EP0000847B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB3427077 1977-08-16
GB3427077 1977-08-16

Publications (2)

Publication Number Publication Date
EP0000847A1 EP0000847A1 (fr) 1979-02-21
EP0000847B1 true EP0000847B1 (fr) 1981-09-16

Family

ID=10363552

Family Applications (1)

Application Number Title Priority Date Filing Date
EP78300280A Expired EP0000847B1 (fr) 1977-08-16 1978-08-14 Production de chlorure de vinyle monomère

Country Status (11)

Country Link
EP (1) EP0000847B1 (fr)
JP (1) JPS5436205A (fr)
AU (1) AU3890778A (fr)
CA (1) CA1104590A (fr)
DE (1) DE2861083D1 (fr)
GB (1) GB2002357A (fr)
IT (1) IT1098061B (fr)
NO (1) NO782772L (fr)
NZ (1) NZ188083A (fr)
PH (1) PH14472A (fr)
PT (1) PT68424A (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR112021014592A2 (pt) 2019-01-25 2021-10-05 Suncor Energy Inc. Compostos fotosensibilizadores, métodos de fabricação e aplicação em plantas
AU2020222515B2 (en) 2019-02-15 2025-10-09 Nutrien Ag Solutions (Canada) Inc. The use of protoporphyrin IX derivatives to improve the health of plants

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR957327A (fr) * 1946-12-17 1950-02-18
DE1075592B (de) * 1955-04-05 1960-02-18 Ethyl Corporation, New York N Y (V St A) Verfahren zur Herstellung von Vinylchlorid oder Vinylidenchlorid
FR1306945A (fr) * 1960-11-25 1962-10-19 Wacker Chemie Gmbh Procédé destiné à réduire la décomposition du chlorure de vinyle lors de la dissociation catalytique du dichloréthane
US3450780A (en) * 1966-03-23 1969-06-17 Monsanto Co Dehydrohalogenation of 1,2-dichloroethane
DE1925568C3 (de) * 1969-05-20 1974-09-19 Wacker-Chemie Gmbh, 8000 Muenchen Verfahren zur Dehydrochlorierung von asymmetrisch substituierten Polychloräthanen

Also Published As

Publication number Publication date
DE2861083D1 (en) 1981-12-03
IT7826765A0 (it) 1978-08-11
GB2002357A (en) 1979-02-21
AU3890778A (en) 1980-02-21
PT68424A (en) 1978-09-01
CA1104590A (fr) 1981-07-07
NO782772L (no) 1979-02-19
PH14472A (en) 1981-08-07
JPS5436205A (en) 1979-03-16
IT1098061B (it) 1985-08-31
NZ188083A (en) 1979-11-01
EP0000847A1 (fr) 1979-02-21

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