JPS53132585A - Recovery of epsilon-caprolactam - Google Patents

Recovery of epsilon-caprolactam

Info

Publication number
JPS53132585A
JPS53132585A JP4664477A JP4664477A JPS53132585A JP S53132585 A JPS53132585 A JP S53132585A JP 4664477 A JP4664477 A JP 4664477A JP 4664477 A JP4664477 A JP 4664477A JP S53132585 A JPS53132585 A JP S53132585A
Authority
JP
Japan
Prior art keywords
caprolactam
epsilon
recovery
oligolactam
polycaprolactam
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.)
Granted
Application number
JP4664477A
Other languages
Japanese (ja)
Other versions
JPS564550B2 (en
Inventor
Yukihiro Tonomura
Yasushi Hamanaka
Takashi Otsubo
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.)
Toyobo Co Ltd
Original Assignee
Toyobo 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 Toyobo Co Ltd filed Critical Toyobo Co Ltd
Priority to JP4664477A priority Critical patent/JPS53132585A/en
Publication of JPS53132585A publication Critical patent/JPS53132585A/en
Publication of JPS564550B2 publication Critical patent/JPS564550B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

PURPOSE: To recover ε-caprolactam economically, by the depolymerization of polycaprolactam or oligolactam, especially cycle oligomer thereof, by introducing super-heated steam thereto in the presence of specific alkali metal salt.
COPYRIGHT: (C)1978,JPO&Japio
JP4664477A 1977-04-21 1977-04-21 Recovery of epsilon-caprolactam Granted JPS53132585A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4664477A JPS53132585A (en) 1977-04-21 1977-04-21 Recovery of epsilon-caprolactam

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4664477A JPS53132585A (en) 1977-04-21 1977-04-21 Recovery of epsilon-caprolactam

Publications (2)

Publication Number Publication Date
JPS53132585A true JPS53132585A (en) 1978-11-18
JPS564550B2 JPS564550B2 (en) 1981-01-30

Family

ID=12753007

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4664477A Granted JPS53132585A (en) 1977-04-21 1977-04-21 Recovery of epsilon-caprolactam

Country Status (1)

Country Link
JP (1) JPS53132585A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994008942A1 (en) * 1992-10-19 1994-04-28 E.I. Du Pont De Nemours And Company Depolymerization of nylon 6,6 (and optionally) nylon 6 to obtain hexamethylene diamine (and caprolactam)
US5556890A (en) * 1993-06-04 1996-09-17 Dsm N.V. Reclaiming ε-caprolactam from carpet waste

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5035183A (en) * 1973-07-09 1975-04-03

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5035183A (en) * 1973-07-09 1975-04-03

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994008942A1 (en) * 1992-10-19 1994-04-28 E.I. Du Pont De Nemours And Company Depolymerization of nylon 6,6 (and optionally) nylon 6 to obtain hexamethylene diamine (and caprolactam)
EP0664787A1 (en) * 1992-10-19 1995-08-02 Du Pont Depolymerization of nylon 6,6 (and optionally) nylon 6 to obtain hexamethylene diamine (and caprolactam).
US5556890A (en) * 1993-06-04 1996-09-17 Dsm N.V. Reclaiming ε-caprolactam from carpet waste

Also Published As

Publication number Publication date
JPS564550B2 (en) 1981-01-30

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