GB1048193A - Process for refining raw lactam - Google Patents

Process for refining raw lactam

Info

Publication number
GB1048193A
GB1048193A GB1392664A GB1392664A GB1048193A GB 1048193 A GB1048193 A GB 1048193A GB 1392664 A GB1392664 A GB 1392664A GB 1392664 A GB1392664 A GB 1392664A GB 1048193 A GB1048193 A GB 1048193A
Authority
GB
United Kingdom
Prior art keywords
lactam
alkali
refining raw
raw lactam
cycloalkanoneoxime
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
GB1392664A
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.)
Toray Industries Inc
Original Assignee
Toyo Rayon Co 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 Toyo Rayon Co Ltd filed Critical Toyo Rayon Co Ltd
Publication of GB1048193A publication Critical patent/GB1048193A/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
    • C07D201/16—Separation or purification
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07B—GENERAL METHODS OF ORGANIC CHEMISTRY; APPARATUS THEREFOR
    • C07B61/00—Other general methods

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Other In-Based Heterocyclic Compounds (AREA)
  • Polyamides (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
  • Hydrogenated Pyridines (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Raw lactam, produced by subjecting a cycloalkanoneoxime obtained by the photonitrosation of a cycloalkane, to Beckmann's reaction, is refined by treating with alkali in a liquid phase and subsequently or simultaneously hydrogenating in the presence of a catalyst. The lactam may thereafter be treated with an ion exchange agent. The alkali may be NaOH, KOH, Na2CO3 or K2CO3. The hydrogenation may be carried out in water, alcohol or benzene using Ni, Co, Pt or Pd based catalysts. Examples relate to the treatment of caprolactam, capryllactam and lauryllactam. Reference has been directed by the Comptroller to Specification 1,002,424.
GB1392664A 1963-04-09 1964-04-03 Process for refining raw lactam Expired GB1048193A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP1876363 1963-04-09
JP2376563 1963-05-19

Publications (1)

Publication Number Publication Date
GB1048193A true GB1048193A (en) 1966-11-16

Family

ID=26355489

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1392664A Expired GB1048193A (en) 1963-04-09 1964-04-03 Process for refining raw lactam

Country Status (2)

Country Link
DE (1) DE1470365C3 (en)
GB (1) GB1048193A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005014538A1 (en) * 2003-07-25 2005-02-17 Dsm Ip Assets B.V. Process for purifying caprolactam

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3925575A1 (en) * 1989-08-02 1991-02-07 Basf Ag PROCESS FOR CONTINUOUS CLEANING OF CAPROLACTAM

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005014538A1 (en) * 2003-07-25 2005-02-17 Dsm Ip Assets B.V. Process for purifying caprolactam
US7365195B2 (en) 2003-07-25 2008-04-29 Dsm Ip Assets B.V. Process for purifying caprolactam
EA010504B1 (en) * 2003-07-25 2008-10-30 ДСМ Ай Пи ЭССЕТС Б.В. Process for purifying caprolactam

Also Published As

Publication number Publication date
DE1470365C3 (en) 1975-06-19
DE1470365B2 (en) 1974-10-31
DE1470365A1 (en) 1969-05-08

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