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GB1030876A - Preparation of caprolactam - Google Patents

Preparation of caprolactam

Info

Publication number
GB1030876A
GB1030876A GB18881/62A GB1888162A GB1030876A GB 1030876 A GB1030876 A GB 1030876A GB 18881/62 A GB18881/62 A GB 18881/62A GB 1888162 A GB1888162 A GB 1888162A GB 1030876 A GB1030876 A GB 1030876A
Authority
GB
United Kingdom
Prior art keywords
caprolactam
nitrosation
preparation
nitrous fumes
chlorosulphonic acid
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
GB18881/62A
Inventor
Frederick Keith Duxbury
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.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries 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 Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to GB18881/62A priority Critical patent/GB1030876A/en
Priority to CH614163A priority patent/CH417602A/en
Publication of GB1030876A publication Critical patent/GB1030876A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D223/00—Heterocyclic compounds containing seven-membered rings having one nitrogen atom as the only ring hetero atom
    • C07D223/02—Heterocyclic compounds containing seven-membered rings having one nitrogen atom as the only ring hetero atom not condensed with other rings
    • C07D223/06—Heterocyclic compounds containing seven-membered rings having one nitrogen atom as the only ring hetero atom not condensed with other rings with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D223/08—Oxygen atoms
    • C07D223/10—Oxygen atoms attached in position 2
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C201/00—Preparation of esters of nitric or nitrous acid or of compounds containing nitro or nitroso groups bound to a carbon skeleton
    • C07C201/06—Preparation of nitro compounds
    • C07C201/08—Preparation of nitro compounds by substitution of hydrogen atoms by nitro groups
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C209/00—Preparation of compounds containing amino groups bound to a carbon skeleton
    • C07C209/62—Preparation of compounds containing amino groups bound to a carbon skeleton by cleaving carbon-to-nitrogen, sulfur-to-nitrogen, or phosphorus-to-nitrogen bonds, e.g. hydrolysis of amides, N-dealkylation of amines or quaternary ammonium compounds
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D201/00—Preparation, separation, purification or stabilisation of unsubstituted lactams
    • 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
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D201/00—Preparation, separation, purification or stabilisation of unsubstituted lactams
    • C07D201/02—Preparation of lactams
    • C07D201/08—Preparation of lactams from carboxylic acids or derivatives thereof, e.g. hydroxy carboxylic acids, lactones or nitriles

Landscapes

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

Abstract

Caprolactam is made by the nitrosation of a mono-substituted cyclohezane, in which the substituent is a monovalent organic radical, in the presence of sulphuric and/or chlorosulphonic acid using a nitrosation agent obtained by contacting nitrous fumes with chlorosulphonic acid. Suitable nitrous fumes are those comprising equimolar proportions of nitric oxide and nitrogen dioxide. Cyclohexane derivatives known in the art to form caprolactam on nitrosation may be used. The example relates to the treatment of cyclohexane carboxylic acid.
GB18881/62A 1962-05-16 1962-05-16 Preparation of caprolactam Expired GB1030876A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB18881/62A GB1030876A (en) 1962-05-16 1962-05-16 Preparation of caprolactam
CH614163A CH417602A (en) 1962-05-16 1963-05-16 Process for the production of caprolactam

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB18881/62A GB1030876A (en) 1962-05-16 1962-05-16 Preparation of caprolactam

Publications (1)

Publication Number Publication Date
GB1030876A true GB1030876A (en) 1966-05-25

Family

ID=10120032

Family Applications (1)

Application Number Title Priority Date Filing Date
GB18881/62A Expired GB1030876A (en) 1962-05-16 1962-05-16 Preparation of caprolactam

Country Status (2)

Country Link
CH (1) CH417602A (en)
GB (1) GB1030876A (en)

Also Published As

Publication number Publication date
CH417602A (en) 1966-07-31

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