GB879054A - Process for preparing 1-cyanobuta-1,3-diene - Google Patents

Process for preparing 1-cyanobuta-1,3-diene

Info

Publication number
GB879054A
GB879054A GB14086/60A GB1408660A GB879054A GB 879054 A GB879054 A GB 879054A GB 14086/60 A GB14086/60 A GB 14086/60A GB 1408660 A GB1408660 A GB 1408660A GB 879054 A GB879054 A GB 879054A
Authority
GB
United Kingdom
Prior art keywords
acetic acid
fission
temperature
water
cyanobutadiene
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
GB14086/60A
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.)
Knapsack AG
Knapsack Griesheim AG
Original Assignee
Knapsack AG
Knapsack Griesheim 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 Knapsack AG, Knapsack Griesheim AG filed Critical Knapsack AG
Publication of GB879054A publication Critical patent/GB879054A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C255/00—Carboxylic acid nitriles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor

Landscapes

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

Abstract

1-Acetoxy-1-cyanobut-2-ene is thermally split to form 1-cyanobuta-1,3-diene and acetic acid by suddenly heating it, within a fraction of a second, by means of a hot current of inert gas having a temperature above 500 DEG C. to the necessary fission temperature of above 400 DEG C., the fission reaction is allowed to proceed at the fission temperature for 0.5-10 seconds, and the issuing gas mixture is cooled, washed with water, and the cyanobutadiene and acetic acid separated by distillation. The preferred fission temperature is 450-650 DEG C. Suitable inert gases, which are preferably initially at 700-1000 DEG C., are argon, nitrogen, carbon monoxide, carbon dioxide, combustion gases, or burnt gases of carbon monoxide, methane or illuminating gas. The gaseous mixture leaving the reaction chamber is preferably cooled to 20-70 DEG C. by spraying in water or aqueous acetic acid. The cyanobutadiene and acetic acid are separated by distillation, the former as an azeotrope with water; a polymerisation inhibitor is preferably present.
GB14086/60A 1959-04-25 1960-04-21 Process for preparing 1-cyanobuta-1,3-diene Expired GB879054A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE879054X 1959-04-25

Publications (1)

Publication Number Publication Date
GB879054A true GB879054A (en) 1961-10-04

Family

ID=6818819

Family Applications (1)

Application Number Title Priority Date Filing Date
GB14086/60A Expired GB879054A (en) 1959-04-25 1960-04-21 Process for preparing 1-cyanobuta-1,3-diene

Country Status (1)

Country Link
GB (1) GB879054A (en)

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