GB838591A - Process of preparing purified solutions containing lactams and lactam oligomers - Google Patents

Process of preparing purified solutions containing lactams and lactam oligomers

Info

Publication number
GB838591A
GB838591A GB34164/58A GB3416458A GB838591A GB 838591 A GB838591 A GB 838591A GB 34164/58 A GB34164/58 A GB 34164/58A GB 3416458 A GB3416458 A GB 3416458A GB 838591 A GB838591 A GB 838591A
Authority
GB
United Kingdom
Prior art keywords
lactam
solutions containing
oligomers
purified solutions
preparing purified
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
GB34164/58A
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.)
Stamicarbon BV
Original Assignee
Stamicarbon BV
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 Stamicarbon BV filed Critical Stamicarbon BV
Publication of GB838591A publication Critical patent/GB838591A/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

Landscapes

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

Abstract

Purified solutions containing lactams and lactam oligomers (built up of 2-5 lactam molecules) are obtained by extracting a lactam dissolved in a substantially water-immiscible organic solvent with washing water obtained by washing lactam polyamide, and passing the resulting aqueous lactam solution containing lactam oligomers over ion exchangers. The original lactam may be that prepared from oximes, or may be the depolymerization products of polyamides. Normal extraction techniques may be used. Both cation and anion exchangers may be used. Specifications 762,879 and 763,954 are referred to.
GB34164/58A 1957-10-26 1958-10-24 Process of preparing purified solutions containing lactams and lactam oligomers Expired GB838591A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL838591X 1957-10-26

Publications (1)

Publication Number Publication Date
GB838591A true GB838591A (en) 1960-06-22

Family

ID=19843237

Family Applications (1)

Application Number Title Priority Date Filing Date
GB34164/58A Expired GB838591A (en) 1957-10-26 1958-10-24 Process of preparing purified solutions containing lactams and lactam oligomers

Country Status (1)

Country Link
GB (1) GB838591A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2328437A (en) * 1995-06-07 1999-02-24 Basf Corp Process for the recovery of polyamide monomers involving filtration and depolymerisation of polyamide oligomers

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2328437A (en) * 1995-06-07 1999-02-24 Basf Corp Process for the recovery of polyamide monomers involving filtration and depolymerisation of polyamide oligomers
GB2328437B (en) * 1995-06-07 1999-11-24 Basf Corp Process for recycling polyamide oligomers

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