IN2012DN05159A - - Google Patents

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Publication number
IN2012DN05159A
IN2012DN05159A IN5159DEN2012A IN2012DN05159A IN 2012DN05159 A IN2012DN05159 A IN 2012DN05159A IN 5159DEN2012 A IN5159DEN2012 A IN 5159DEN2012A IN 2012DN05159 A IN2012DN05159 A IN 2012DN05159A
Authority
IN
India
Prior art keywords
membranes
caprolactam
membrane
permeate
retentate
Prior art date
Application number
Inventor
Maria Elena Avramescu
Johan Thomas Tinge
Original Assignee
Dsm Ip Assets 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 Dsm Ip Assets Bv filed Critical Dsm Ip Assets Bv
Publication of IN2012DN05159A publication Critical patent/IN2012DN05159A/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D223/00—Heterocyclic compounds containing seven-membered rings having one nitrogen atom as the only ring hetero atom
    • C07D223/02—Heterocyclic compounds containing seven-membered rings having one nitrogen atom as the only ring hetero atom not condensed with other rings
    • C07D223/06—Heterocyclic compounds containing seven-membered rings having one nitrogen atom as the only ring hetero atom not condensed with other rings with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D223/08—Oxygen atoms
    • C07D223/10—Oxygen atoms attached in position 2
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D201/00—Preparation, separation, purification or stabilisation of unsubstituted lactams
    • C07D201/16—Separation or purification
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D201/00—Preparation, separation, purification or stabilisation of unsubstituted lactams
    • C07D201/14—Preparation of salts or adducts of lactams

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Other In-Based Heterocyclic Compounds (AREA)

Abstract

The invention relates to a process for treating an aqueous solution containing Ecaprolactam, ammonium sulphate and one or more other impurities, comprising one or more organic impurities from a caprolactam production process and optionally other salts than ammonium sulphate, by means of a membrane process, thereby obtaining a retentate and a permeate, in which process the membrane used is selected from the group of polyether sulphone membranes, sulphonated polyether sulphone membranes, polyester membranes, polysulphone membranes, aromatic polyamide membranes, polyvinyl alcohol membranes, polypiperazine membranes, cellulose acetate membranes, titanium oxide membranes, zirconium oxide membranes and aluminium oxide membranes, having a molecular weight cut off in the range of 100-1000 glmol; and wherein more than 60 wt.% of the caprolactam in the aqueous solution is passed through a membrane to the permeate side, to obtain a purified caprolactam containing permeate stream, and wherein at least 50 wt.% of the organic impurities are retained in the retentate solution.
IN5159DEN2012 2009-12-18 2010-12-17 IN2012DN05159A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP09179903 2009-12-18
PCT/EP2010/070097 WO2011073400A2 (en) 2009-12-18 2010-12-17 Caprolactam recovery with membrane treatment

Publications (1)

Publication Number Publication Date
IN2012DN05159A true IN2012DN05159A (en) 2015-10-23

Family

ID=42174487

Family Applications (1)

Application Number Title Priority Date Filing Date
IN5159DEN2012 IN2012DN05159A (en) 2009-12-18 2010-12-17

Country Status (9)

Country Link
US (1) US20130211072A1 (en)
EP (1) EP2513050A2 (en)
JP (1) JP2013514335A (en)
KR (1) KR101810704B1 (en)
CN (1) CN102666483A (en)
EA (1) EA201200915A1 (en)
IN (1) IN2012DN05159A (en)
TW (1) TWI565516B (en)
WO (1) WO2011073400A2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104071948B (en) * 2014-06-25 2016-04-27 江苏久吾高科技股份有限公司 A kind of method and device utilizing membrane technique process caprolactam wastewater
CN108341763B (en) * 2018-04-24 2020-12-01 河北美邦工程科技股份有限公司 Caprolactam crystallization and purification method
CN110964492B (en) * 2018-09-29 2022-04-12 中国石油化工股份有限公司 Sulfur dissolving agent and preparation method and application thereof
CN114805207A (en) * 2022-04-14 2022-07-29 山东华鲁恒升化工股份有限公司 Method for removing sulfuric acid in rearrangement solution by using membrane separation technology

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS523261A (en) 1975-06-24 1977-01-11 Sumitomo Chem Co Ltd Purification method for polluted water
JPS59115704A (en) 1982-12-24 1984-07-04 Toray Ind Inc Treatment of semipermeable membrane
NL1005927C2 (en) 1997-04-29 1998-11-02 Dsm Nv Method for recovering caprolactam from a neutralized rearrangement mixture.
NL1011936C2 (en) * 1999-04-29 2000-10-31 Dsm Nv Process for preparing caprolactam.
RO121266B1 (en) 2001-03-01 2007-02-28 Dsm N.V. Process for recovering and purifying caprolactam from an organic solvent
CN101570503B (en) * 2008-11-11 2011-04-27 广东新会美达锦纶股份有限公司 Method for concentrating low-concentration caprolactam water solution

Also Published As

Publication number Publication date
WO2011073400A2 (en) 2011-06-23
WO2011073400A3 (en) 2011-09-09
TW201129418A (en) 2011-09-01
EP2513050A2 (en) 2012-10-24
KR101810704B1 (en) 2017-12-19
CN102666483A (en) 2012-09-12
TWI565516B (en) 2017-01-11
EA201200915A1 (en) 2012-12-28
US20130211072A1 (en) 2013-08-15
JP2013514335A (en) 2013-04-25
KR20120112544A (en) 2012-10-11

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