GB827703A - A process for the recovery of -e-caprolactam from its polymerisate - Google Patents

A process for the recovery of -e-caprolactam from its polymerisate

Info

Publication number
GB827703A
GB827703A GB17178/58A GB1717858A GB827703A GB 827703 A GB827703 A GB 827703A GB 17178/58 A GB17178/58 A GB 17178/58A GB 1717858 A GB1717858 A GB 1717858A GB 827703 A GB827703 A GB 827703A
Authority
GB
United Kingdom
Prior art keywords
caprolactam
polymerisate
solution
recovery
lactam
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
GB17178/58A
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.)
Inventa AG fuer Forschung und Patentverwertung
Original Assignee
Inventa AG fuer Forschung und Patentverwertung
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 Inventa AG fuer Forschung und Patentverwertung filed Critical Inventa AG fuer Forschung und Patentverwertung
Publication of GB827703A publication Critical patent/GB827703A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
    • C08G69/46—Post-polymerisation treatment

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Other In-Based Heterocyclic Compounds (AREA)
  • Polyamides (AREA)
  • Pyrrole Compounds (AREA)

Abstract

e -Caprolactam is recovered from poly-caprolactam containing it by evaporation from the polymer in a thin layer evaporator with the aid of an inert gas as carrier, the lactam-containing gas being washed with water or an aqueous caprolactam solution. The caprolactam solution may be that obtained as distillation product when a crude polymerisate of e -caprolactam is heated under reduced pressure. The caprolactam wash solution can be re-circulated to obtain any desired concentration. Specification 711,956, [Group IV (a)], is referred to.
GB17178/58A 1957-07-16 1958-05-29 A process for the recovery of -e-caprolactam from its polymerisate Expired GB827703A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH827703X 1957-07-16

Publications (1)

Publication Number Publication Date
GB827703A true GB827703A (en) 1960-02-10

Family

ID=4540057

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17178/58A Expired GB827703A (en) 1957-07-16 1958-05-29 A process for the recovery of -e-caprolactam from its polymerisate

Country Status (1)

Country Link
GB (1) GB827703A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3404128A (en) * 1965-06-04 1968-10-01 Continental Can Co Method for preparing a diphenolic acid amide phenol-aldehyde resin
EP0005466A1 (en) * 1978-05-18 1979-11-28 Bayer Ag Process for preparing polyamides free from monomers and dimers

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3404128A (en) * 1965-06-04 1968-10-01 Continental Can Co Method for preparing a diphenolic acid amide phenol-aldehyde resin
EP0005466A1 (en) * 1978-05-18 1979-11-28 Bayer Ag Process for preparing polyamides free from monomers and dimers

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