DE3173977D1 - Recovery of caprolactam from nylon 6 oligomers - Google Patents

Recovery of caprolactam from nylon 6 oligomers

Info

Publication number
DE3173977D1
DE3173977D1 DE8181106355T DE3173977T DE3173977D1 DE 3173977 D1 DE3173977 D1 DE 3173977D1 DE 8181106355 T DE8181106355 T DE 8181106355T DE 3173977 T DE3173977 T DE 3173977T DE 3173977 D1 DE3173977 D1 DE 3173977D1
Authority
DE
Germany
Prior art keywords
caprolactam
oligomers
nylon
recovery
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
DE8181106355T
Other languages
German (de)
English (en)
Inventor
Lamberto Cresentini
Webb Bays Blackman
Joseph Donald Decaprio
William Bernard Fisher
Roy Jeffrey Lilley
John Walter Wagner
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.)
Honeywell International Inc
Original Assignee
Allied Corp
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=22690811&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE3173977(D1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Allied Corp filed Critical Allied Corp
Application granted granted Critical
Publication of DE3173977D1 publication Critical patent/DE3173977D1/de
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
    • C07D201/12—Preparation of lactams by depolymerising polyamides
    • 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)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
  • Other In-Based Heterocyclic Compounds (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
DE8181106355T 1980-09-17 1981-08-17 Recovery of caprolactam from nylon 6 oligomers Expired DE3173977D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/187,864 US4311642A (en) 1980-09-17 1980-09-17 Recovery of caprolactam from nylon 6 oligomers

Publications (1)

Publication Number Publication Date
DE3173977D1 true DE3173977D1 (en) 1986-04-10

Family

ID=22690811

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8181106355T Expired DE3173977D1 (en) 1980-09-17 1981-08-17 Recovery of caprolactam from nylon 6 oligomers

Country Status (6)

Country Link
US (1) US4311642A (enExample)
EP (1) EP0048340B1 (enExample)
JP (1) JPS5781458A (enExample)
KR (1) KR860000829B1 (enExample)
CA (1) CA1157020A (enExample)
DE (1) DE3173977D1 (enExample)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4767503A (en) * 1983-08-29 1988-08-30 Allied Corporation Removal of light impurities from caprolactam by distillation with water
US5169870A (en) * 1991-06-21 1992-12-08 Basf Corporation Reclaiming ε-caprolactam from nylon 6 carpet
DE4211609A1 (de) * 1991-08-30 1993-03-04 Bayer Ag Gewinnung von caprolactam durch thermische spaltung von polyamid 6
DE4216848A1 (de) * 1992-05-21 1993-11-25 Basf Ag Verfahren zur Rückgewinnung von Caprolactam aus Polycaprolactam
EP0608454B1 (de) * 1993-01-28 1997-08-13 POLYMER ENGINEERING GmbH Verfahren und Vorrichtung zur Herstellung von Polyamid 6 aus Polyamid-Abfällen
US5457197A (en) * 1994-04-08 1995-10-10 Alliedsignal Inc. Monomer recovery from multi-component materials
US5495015A (en) * 1994-12-12 1996-02-27 Basf Aktiengesellschaft Process for producing caprolactam through hydrolytic cleavage of molten polycaprolactam
US5656757A (en) * 1995-08-10 1997-08-12 Alliedsignal Inc. Monomer recovery from multi-component materials
DE19648747A1 (de) * 1996-11-25 1998-05-28 Basf Ag Verfahren zur Rückgewinnung von Caprolactam und seinen Oligomeren aus wässrigen Polycaprolactam-Extrakten
NL1005942C2 (nl) * 1997-05-01 1998-11-03 Dsm Nv Depolymeriseren van polyamiden.
US5990306A (en) * 1997-09-03 1999-11-23 Alliedsignal Inc. Process for the purification of caprolactam obtained from the depolymerization of polyamide-containing carpet
WO2000050394A2 (en) * 1999-02-26 2000-08-31 Dsm N.V. A process for recovering caprolactam and steam
DE10251798A1 (de) * 2002-11-07 2004-05-19 Bayer Ag Verfahren zur Herstellung von Polyamid 6 mit geringem Dimergehalt
US9193865B2 (en) 2012-09-27 2015-11-24 E I Du Pont De Nemours And Company Polyamides having improved anti-delamination
US9023903B2 (en) 2012-09-27 2015-05-05 E I Du Pont De Nemours And Company Reinforced polyamides having improved anti-delamination
US9109114B2 (en) 2012-09-27 2015-08-18 E I Du Pont De Nemours And Company Polyamides having improved anti-delamination
CN107051345A (zh) * 2017-01-25 2017-08-18 江苏永通新材料科技有限公司 一种用于生产聚酰胺切片的低聚物分离器
JP6902157B2 (ja) * 2017-08-01 2021-07-14 アドバンシックス・レジンズ・アンド・ケミカルズ・リミテッド・ライアビリティ・カンパニーＡｄｖａｎｓｉｘ Ｒｅｓｉｎｓ ＆ Ｃｈｅｍｉｃａｌｓ Ｌｌｃ ポリアミドの環状オリゴマーを重合するための方法
AU2023246631A1 (en) * 2022-04-01 2024-10-10 Basf Se Separation of impurities in a process for hydrolytically depolymerizing a polyamide
WO2025238077A1 (en) * 2024-05-15 2025-11-20 Basf Se Process for separating high boilers from polyamide 6 depolymerization mixtures

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD59094A (enExample) *
US3245964A (en) * 1962-11-13 1966-04-12 Allied Chem Continuous extraction of poly-e-caproamide
US3182055A (en) * 1963-02-18 1965-05-04 Allied Chem Regeneration of e-caprolactam from polyamides
US3294756A (en) * 1963-05-01 1966-12-27 Allied Chem Continuous polymerization of epsilon-caprolactam
US3266165A (en) * 1964-10-01 1966-08-16 Allied Chem Process and apparatus for segregative drying of nylon-6
NL135959C (enExample) * 1964-12-23
US3373145A (en) * 1965-04-29 1968-03-12 Allied Chem Washing of polymer particulates by regular periodic ebb and flow of aqueous solvent
US3600381A (en) * 1968-05-09 1971-08-17 Teijin Ltd Caprolactam purification process
AU434985B2 (en) * 1969-12-15 1973-04-18 Tevin Limited Process for obtaining purified caprolactam bythe purification of oligomer-containing impure epsilon caprolactam
DE2135085C3 (de) * 1971-07-14 1981-12-03 Basf Ag, 6700 Ludwigshafen Verfahren zur Wiedergewinnung von Caprolactam aus einem Gemisch, das Caprolactam und dessen Oligomere enthält
US4107160A (en) * 1977-08-24 1978-08-15 Zimmer Aktiengesellschaft Continuous process for the recovery of caprolactam

Also Published As

Publication number Publication date
EP0048340B1 (en) 1986-03-05
JPH0148894B2 (enExample) 1989-10-20
JPS5781458A (en) 1982-05-21
EP0048340A1 (en) 1982-03-31
US4311642A (en) 1982-01-19
KR860000829B1 (ko) 1986-07-02
KR830007546A (ko) 1983-10-21
CA1157020A (en) 1983-11-15

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Legal Events

Date Code Title Description
8363 Opposition against the patent
8331 Complete revocation