GB966333A - Improved process for the preparation of caprolactam - Google Patents

Improved process for the preparation of caprolactam

Info

Publication number
GB966333A
GB966333A GB30822/61A GB3082261A GB966333A GB 966333 A GB966333 A GB 966333A GB 30822/61 A GB30822/61 A GB 30822/61A GB 3082261 A GB3082261 A GB 3082261A GB 966333 A GB966333 A GB 966333A
Authority
GB
United Kingdom
Prior art keywords
caprolactam
preparation
oleum
air
improved process
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
GB30822/61A
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.)
SNIA Viscosa SpA
Original Assignee
SNIA Viscosa SpA
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 SNIA Viscosa SpA filed Critical SNIA Viscosa SpA
Publication of GB966333A publication Critical patent/GB966333A/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
    • C07D201/08—Preparation of lactams from carboxylic acids or derivatives thereof, e.g. hydroxy carboxylic acids, lactones or nitriles
    • 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
    • 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

Landscapes

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

Abstract

e -Caprolactam is produced by reacting a cyclohexyl compound RX or RCOY, where R is cyclohexyl, X is the carboxyl group or an ester thereof, and Y is an aromatic or alicyclic hydrocarbon radical, with nitrosylating agents capable of providing NO+-ions in the presence of sulphuric acid or oleum, characterized by the addition of oxygen or a gas containing it (e.g. air) to the reactants. Examples employ hexahydrobenzoic acid, oleum, N2O3 and air. Specifications 904,302, 904,413 and 912,034 are referred to.
GB30822/61A 1960-08-26 1961-08-25 Improved process for the preparation of caprolactam Expired GB966333A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT1511260 1960-08-26

Publications (1)

Publication Number Publication Date
GB966333A true GB966333A (en) 1964-08-12

Family

ID=11146363

Family Applications (2)

Application Number Title Priority Date Filing Date
GB30822/61A Expired GB966333A (en) 1960-08-26 1961-08-25 Improved process for the preparation of caprolactam
GB40874/63A Expired GB989597A (en) 1960-08-26 1961-08-25 Improved process for the preparation of -caprolactam by nitrosylating cyclohexyl compounds in the presence of nitric acid

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB40874/63A Expired GB989597A (en) 1960-08-26 1961-08-25 Improved process for the preparation of -caprolactam by nitrosylating cyclohexyl compounds in the presence of nitric acid

Country Status (2)

Country Link
BE (1) BE607566A (en)
GB (2) GB966333A (en)

Also Published As

Publication number Publication date
BE607566A (en) 1962-02-26
GB989597A (en) 1965-04-22

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