GB989597A - Improved process for the preparation of -caprolactam by nitrosylating cyclohexyl compounds in the presence of nitric acid - Google Patents

Improved process for the preparation of -caprolactam by nitrosylating cyclohexyl compounds in the presence of nitric acid

Info

Publication number
GB989597A
GB989597A GB40874/63A GB4087463A GB989597A GB 989597 A GB989597 A GB 989597A GB 40874/63 A GB40874/63 A GB 40874/63A GB 4087463 A GB4087463 A GB 4087463A GB 989597 A GB989597 A GB 989597A
Authority
GB
United Kingdom
Prior art keywords
nitrosylating
nitric acid
caprolactam
preparation
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
GB40874/63A
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 GB989597A publication Critical patent/GB989597A/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)
  • Pyrane Compounds (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

e -Caprolactum is prepared by reacting hexahydrobenzoic acid or an ester thereof with nitrosylating agents capable of providing NO+-ions, in the presence of sulphuric acid or oleum, nitric acid being added to the reactants, preferably in amount not exceeding 10% (molar) of the nitrosylating agent present. The preferred reaction temperature is 50-100 DEG C. Examples use nitrosyl sulphuric acid as nitrosylating agent.
GB40874/63A 1960-08-26 1961-08-25 Improved process for the preparation of -caprolactam by nitrosylating cyclohexyl compounds in the presence of nitric acid Expired GB989597A (en)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
GB989597A true GB989597A (en) 1965-04-22

Family

ID=11146363

Family Applications (2)

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
GB30822/61A Expired GB966333A (en) 1960-08-26 1961-08-25 Improved process for the preparation of caprolactam

Family Applications After (1)

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

Country Status (2)

Country Link
BE (1) BE607566A (en)
GB (2) GB989597A (en)

Also Published As

Publication number Publication date
BE607566A (en) 1962-02-26
GB966333A (en) 1964-08-12

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