GB709126A - Improvements in or relating to the preparation of 1-alkynes - Google Patents

Improvements in or relating to the preparation of 1-alkynes

Info

Publication number
GB709126A
GB709126A GB1525251A GB1525251A GB709126A GB 709126 A GB709126 A GB 709126A GB 1525251 A GB1525251 A GB 1525251A GB 1525251 A GB1525251 A GB 1525251A GB 709126 A GB709126 A GB 709126A
Authority
GB
United Kingdom
Prior art keywords
alkyne
solution
boiling
yielding
alkali metal
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
GB1525251A
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.)
NORMAN EDGAR WILLIAMS
SAMUEL AARON MILLER
BOC Group Ltd
Original Assignee
NORMAN EDGAR WILLIAMS
SAMUEL AARON MILLER
British Oxigen 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 NORMAN EDGAR WILLIAMS, SAMUEL AARON MILLER, British Oxigen Ltd filed Critical NORMAN EDGAR WILLIAMS
Priority to GB1525251A priority Critical patent/GB709126A/en
Publication of GB709126A publication Critical patent/GB709126A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C1/00—Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon
    • C07C1/26—Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon starting from organic compounds containing only halogen atoms as hetero-atoms
    • C07C1/30—Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon starting from organic compounds containing only halogen atoms as hetero-atoms by splitting-off the elements of hydrogen halide from a single molecule

Landscapes

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

Abstract

1-Alkynes are prepared by continuously feeding a 1,2-dihaloalkane or a 1- or 2-mono-haloalkene into a boiling solution of an alkali metal alkoxide of an alcohol boiling above 100 DEG C. in an alcohol boiling above 100 DEG C. and substantially above the boiling point of the 1-alkyne, at a rate such that the temperature of the solution is not substantially lowered during the addition and separating the alkyne from the vapours released from the solution. These vapours are preferably led up a reflux condenser maintained at a temperature above the boiling point of the alkyne, but below that of the alcoholic solvent and of unreacted or partially dehydrohalogenated starting material which are thereby condensed and returned to the reaction. The alkoxide may be obtained by dissolving an alkali metal hydroxide in the alcohol boiling above 100 DEG C. In examples, sodium hydroxide is dissolved in ethoxyethanol in a reactor heated to 170 DEG C. and provided with a reflux condenser whereupon there is added dropwise (1) 1,2-dibromo- or dichloropropane yielding propyne and some allene; (2) 1,2-dibromobutane yielding 1-butyne.
GB1525251A 1951-06-27 1951-06-27 Improvements in or relating to the preparation of 1-alkynes Expired GB709126A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1525251A GB709126A (en) 1951-06-27 1951-06-27 Improvements in or relating to the preparation of 1-alkynes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1525251A GB709126A (en) 1951-06-27 1951-06-27 Improvements in or relating to the preparation of 1-alkynes

Publications (1)

Publication Number Publication Date
GB709126A true GB709126A (en) 1954-05-19

Family

ID=10055758

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1525251A Expired GB709126A (en) 1951-06-27 1951-06-27 Improvements in or relating to the preparation of 1-alkynes

Country Status (1)

Country Link
GB (1) GB709126A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2908732A (en) * 1955-06-17 1959-10-13 British Oxygen Co Ltd Preparation of 1-alkynes
DE2251651A1 (en) * 1971-10-21 1973-04-26 Sherwin Williams Co PRODUCTION OF ALKINES BY DEHYDROHALOGENATION

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2908732A (en) * 1955-06-17 1959-10-13 British Oxygen Co Ltd Preparation of 1-alkynes
DE2251651A1 (en) * 1971-10-21 1973-04-26 Sherwin Williams Co PRODUCTION OF ALKINES BY DEHYDROHALOGENATION

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