GB732899A - Improvements in and relating to the preparation of caprolactam - Google Patents

Improvements in and relating to the preparation of caprolactam

Info

Publication number
GB732899A
GB732899A GB1227351A GB1227351A GB732899A GB 732899 A GB732899 A GB 732899A GB 1227351 A GB1227351 A GB 1227351A GB 1227351 A GB1227351 A GB 1227351A GB 732899 A GB732899 A GB 732899A
Authority
GB
United Kingdom
Prior art keywords
solvents
caprolactam
perchlorethylene
solvent
reaction
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
GB1227351A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB1227351A priority Critical patent/GB732899A/en
Publication of GB732899A publication Critical patent/GB732899A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D201/00—Preparation, separation, purification or stabilisation of unsubstituted lactams
    • C07D201/02—Preparation of lactams
    • C07D201/04—Preparation of lactams from or via oximes by Beckmann rearrangement

Landscapes

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

Abstract

Caprolactam is prepared by treating cyclohexanone oxime with sulphur trioxide in the presence of a solvent which is both resistant to sulphur trioxide and inert towards cyclohexanone oxime or a miscible mixture of such solvents. In a continuous process solutions of the reactants may be mixed together directly or they may be allowed to run into a reacted mixture. The heat of reaction is removed by cooling, especially by allowing part of the solvent to evaporate. Solvents mentioned are liquid sulphur dioxide, carbon disulphide, fluorinated hydrocarbons and chlorinated hydrocarbons such as perchlorethylene. In examples the solvents employed in carrying out the reaction are liquid sulphur dioxide (1-3), carbon disulphide (4-6) and perchlorethylene (7 and 8).
GB1227351A 1951-05-25 1951-05-25 Improvements in and relating to the preparation of caprolactam Expired GB732899A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1227351A GB732899A (en) 1951-05-25 1951-05-25 Improvements in and relating to the preparation of caprolactam

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1227351A GB732899A (en) 1951-05-25 1951-05-25 Improvements in and relating to the preparation of caprolactam

Publications (1)

Publication Number Publication Date
GB732899A true GB732899A (en) 1955-06-29

Family

ID=10001527

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1227351A Expired GB732899A (en) 1951-05-25 1951-05-25 Improvements in and relating to the preparation of caprolactam

Country Status (1)

Country Link
GB (1) GB732899A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0282032A2 (en) * 1987-03-11 1988-09-14 ENICHEM S.p.A. Process for the synthesis of epsilon-caprolactam

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0282032A2 (en) * 1987-03-11 1988-09-14 ENICHEM S.p.A. Process for the synthesis of epsilon-caprolactam
EP0282032A3 (en) * 1987-03-11 1991-03-06 ENICHEM S.p.A. Process for the synthesis of epsilon-caprolactam

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