FR2389603A1 - - Google Patents

Info

Publication number
FR2389603A1
FR2389603A1 FR7813132A FR7813132A FR2389603A1 FR 2389603 A1 FR2389603 A1 FR 2389603A1 FR 7813132 A FR7813132 A FR 7813132A FR 7813132 A FR7813132 A FR 7813132A FR 2389603 A1 FR2389603 A1 FR 2389603A1
Authority
FR
France
Prior art keywords
pyrrolidone
polypyrrolidone
recovery
degrees
recover
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.)
Pending
Application number
FR7813132A
Other languages
English (en)
French (fr)
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 FR2389603A1 publication Critical patent/FR2389603A1/fr
Pending 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
  • Pyrrole Compounds (AREA)
FR7813132A 1977-05-06 1978-05-03 Pending FR2389603A1 (enExample)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7704984A NL7704984A (nl) 1977-05-06 1977-05-06 Werkwijze voor het terugwinnen van pyrrolidon-2.

Publications (1)

Publication Number Publication Date
FR2389603A1 true FR2389603A1 (enExample) 1978-12-01

Family

ID=19828500

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7813132A Pending FR2389603A1 (enExample) 1977-05-06 1978-05-03

Country Status (8)

Country Link
US (1) US4264501A (enExample)
JP (1) JPS53137957A (enExample)
BE (1) BE866458A (enExample)
DE (1) DE2819840A1 (enExample)
FR (1) FR2389603A1 (enExample)
GB (1) GB1593125A (enExample)
IT (1) IT1102532B (enExample)
NL (1) NL7704984A (enExample)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8003365A (nl) * 1980-06-10 1982-01-04 Stamicarbon Werkwijze voor het zuiveren van 2-pyrrolidon.
US4720328A (en) * 1981-06-26 1988-01-19 Akzona Incorporated Method for removing impurities from caprolactam
US5153307A (en) * 1991-07-31 1992-10-06 International Business Machines Corporation Stabilization of polyamide alkyl ester solutions
US5239053A (en) * 1992-02-14 1993-08-24 Isp Investments Inc. Purification of vinyl lactam polymers
DE10022988A1 (de) * 2000-05-11 2001-11-15 Basf Ag Verfahren zur Aufbereitung von Pyrrolidon- und N-Vinylpyrrolidon-Rückständen
CN103709087B (zh) * 2013-11-29 2016-06-08 焦作中维特品药业有限公司 一种α-吡咯烷酮的制备方法
CN106166559B (zh) * 2016-06-13 2018-08-21 焦作中维特品药业有限公司 一种nvp生产中残渣物质处理回收的方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2828307A (en) * 1958-03-25 Karl h
CA691848A (en) * 1964-08-04 M. Jones Darrell Process for reclaiming waste nylon
US2685570A (en) * 1952-02-28 1954-08-03 Verdiers Edward Erlick Process for precipitating synthetic polyamides in combination with silk fiber
US3926927A (en) * 1974-11-25 1975-12-16 Monsanto Co Stripping monomers from a slurry of copolymerized acrylonitrile
US4187370A (en) * 1977-04-29 1980-02-05 Chevron Research Company Polymerization and recovery of 2-pyrrolidone with acid treatment

Also Published As

Publication number Publication date
IT7849227A0 (it) 1978-05-05
DE2819840A1 (de) 1978-11-16
GB1593125A (en) 1981-07-15
JPS53137957A (en) 1978-12-01
IT1102532B (it) 1985-10-07
US4264501A (en) 1981-04-28
BE866458A (nl) 1978-10-27
NL7704984A (nl) 1978-11-08

Similar Documents

Publication Publication Date Title
FR2394497A1 (fr) Procede d'epuration d'eaux residuaires contenant du phenol, des derives de phenol ou du phenol et du formaldehyde
ATE20334T1 (de) Herstellung von chlordioxid.
FR2400384A1 (fr) Procede de separation d'une matiere d'un melange fluide la contenant
NO153488C (no) Fremgangsm¨te ved rensing av urea-inneholdende avfallsvann
SE8300133L (sv) Atervinning av fluorider fran kolhaltiga material
FR2453110A1 (fr) Procede pour la recuperation d'uranium
FR2389603A1 (enExample)
GB1445648A (en) Method of preparation of bromine from hydrobromic acid solutions
KR870011261A (ko) 조각물질의 융해 및 가스 제거방법
FR2364530A1 (fr) Procede pour la destruction de dechets organiques radioactifs
FR2367755A1 (fr) Procede pou
FR2402668A1 (fr) Procede pour la separation des polyolefines fabriquees a basse pression
BR8402801A (pt) Processo de purificacao de uma mistura agua-alcool em c1-c2 proveniente de um processo de fabricacao industrial de alcool em c1-c2
OA05877A (fr) Procédé de traitement chimique de minerais uranifères contenant des composés du soufre et/ou des matières orgarniques, par lixiviation alcaline.
KR860002446A (ko) 2,4-디클로로-5-플루오로-벤조산의 제조방법
GB1520728A (en) Process for the production of benzoyl cyanide
PT77232A (fr) Procede pour la dissolution selective du plomb
GB1284249A (en) Purification of spent sulphuric acid
DE3764821D1 (de) Verfahren zur herstellung von 1,1,3-trichloraceton.
FR2435282A1 (fr) Procede d'extraction par lavage de gaz acides a partir de melanges gazeux a l'aide d'hexamethylenediamine
KR830004160A (ko) 안정된 황산티타늄 용액의 제조방법
ATE7781T1 (de) Verfahren zur katalytischen umwandlung von tetrachlorkohlenstoff in perchlorethylen.
KR830005087A (ko) 염소처리에 의한 4-메톡시벤조일 클로라이드의 개선된 제조방법
FR2383883A1 (fr) Procede de fabrication du phosgene
GB1467795A (en) Purification of sulphuric acid