GB1251258A - - Google Patents

Info

Publication number
GB1251258A
GB1251258A GB1251258DA GB1251258A GB 1251258 A GB1251258 A GB 1251258A GB 1251258D A GB1251258D A GB 1251258DA GB 1251258 A GB1251258 A GB 1251258A
Authority
GB
United Kingdom
Prior art keywords
caprolactam
solvent
water
march
solvents
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
Other languages
English (en)
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
Priority claimed from DE19681770088 external-priority patent/DE1770088C3/de
Application filed filed Critical
Publication of GB1251258A publication Critical patent/GB1251258A/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)
  • Polyamides (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
  • Other In-Based Heterocyclic Compounds (AREA)
  • Pyrrole Compounds (AREA)
GB1251258D 1968-03-29 1969-03-28 Expired GB1251258A (xx)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681770088 DE1770088C3 (de) 1968-03-29 Verfahren zur Gewinnung von Caprolactam aus den durch Behandeln von Polycaprolactam mit Wasser erhaltenen Waschwässern

Publications (1)

Publication Number Publication Date
GB1251258A true GB1251258A (xx) 1971-10-27

Family

ID=5700393

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1251258D Expired GB1251258A (xx) 1968-03-29 1969-03-28

Country Status (6)

Country Link
BE (1) BE730682A (xx)
CH (1) CH510666A (xx)
ES (1) ES365414A1 (xx)
FR (1) FR2005035A1 (xx)
GB (1) GB1251258A (xx)
NL (1) NL6904888A (xx)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0002300A1 (en) * 1977-12-02 1979-06-13 Stamicarbon B.V. Process for the recovery of 2-pyrrolidone
WO1998041502A1 (en) * 1997-03-17 1998-09-24 Dsm N.V. Process for purifying caprolactam
US6191274B1 (en) 1996-02-17 2001-02-20 Dsm N.V. Recovery of ε-caprolactam

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0002300A1 (en) * 1977-12-02 1979-06-13 Stamicarbon B.V. Process for the recovery of 2-pyrrolidone
US6191274B1 (en) 1996-02-17 2001-02-20 Dsm N.V. Recovery of ε-caprolactam
WO1998041502A1 (en) * 1997-03-17 1998-09-24 Dsm N.V. Process for purifying caprolactam
US6448395B1 (en) 1997-03-17 2002-09-10 Dsm N.V. Process for purifying caprolactam

Also Published As

Publication number Publication date
DE1770088A1 (de) 1971-09-16
DE1770088B2 (de) 1976-05-26
ES365414A1 (es) 1971-01-16
FR2005035A1 (xx) 1969-12-05
BE730682A (xx) 1969-09-29
NL6904888A (xx) 1969-10-01
CH510666A (de) 1971-07-31

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees