KR940009145A - Process for recovering lactam from emulsion-containing polyamide - Google Patents

Process for recovering lactam from emulsion-containing polyamide Download PDF

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Publication number
KR940009145A
KR940009145A KR1019920019463A KR920019463A KR940009145A KR 940009145 A KR940009145 A KR 940009145A KR 1019920019463 A KR1019920019463 A KR 1019920019463A KR 920019463 A KR920019463 A KR 920019463A KR 940009145 A KR940009145 A KR 940009145A
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KR
South Korea
Prior art keywords
lactam
emulsion
recovery
remove
water
Prior art date
Application number
KR1019920019463A
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Korean (ko)
Other versions
KR950006148B1 (en
Inventor
이귤섭
남창우
Original Assignee
구창남
동양나이론 주식회사
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.)
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Application filed by 구창남, 동양나이론 주식회사 filed Critical 구창남
Priority to KR1019920019463A priority Critical patent/KR950006148B1/en
Publication of KR940009145A publication Critical patent/KR940009145A/en
Application granted granted Critical
Publication of KR950006148B1 publication Critical patent/KR950006148B1/en

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    • 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

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)

Abstract

본 발명은 방사유제 함유 폴리아미드폐사를 인산촉매하에서 해중합하여 얻은 회수락탐을 10∼60%의 수용액으로 한후 3개 이상의 분리막을 갖는 유제분리기로 처리하여 수불용성 유제성분을 분리제거하고, 다시 폴리아크릴아미드계 고분자응집제로 처리하여 수용성 유제성분을 응집시켜 분리제거한후, 마지막으로 통상의 방법으로 정제처리하여 락탐을 회수하는 방법이다.In the present invention, a recovery lactam obtained by depolymerization of a polyamide waste containing polyunsaturated oil under a phosphate catalyst is treated with an aqueous solution of 10 to 60%, and then treated with an emulsion separator having three or more separation membranes to separate and remove the water-insoluble emulsion component, and then to polyacrylic acid. It is a method of recovering lactam by treating with an amide polymer coagulant to agglomerate and remove the water-soluble emulsion component, and finally purifying by a conventional method.

Description

유제함유된 폴리아미드로부터 락탐을 회수하는 방법Process for recovering lactam from emulsion-containing polyamide

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 본 발명에서 채택하고 있는 유제분리기의 대략적 공정도이다.1 is a schematic process diagram of an emulsion separator employed in the present invention.

Claims (3)

방사유제 함유 폴리아미드폐사를 인산촉매하에서 해중합하여 얻은 회수락탐을 정제하는 방법에서, (1)회수락탐의 수용액을 분리막을 갖는 유제분리기에서 처리하여 수불용성 유제성분을 물리적으로 분리제거하고, (2)상기 수용액에 폴리아크릴아미드계 고분자응집제를 첨가처리하여 수용성 유제성분을 응집물로하여 분리제거하고, (3)통상의 과망간산칼륨, 활성탄처리 및 증류처리로서 회수락탐을 얻는 것을 특징으로 하는 유제를 함유한 폴리아미드로 부터 락탐을 회수하는 방법.In the method for purifying a recovery lactam obtained by depolymerizing a polyamide waste containing a spinning oil under a phosphate catalyst, (1) an aqueous solution of a recovery lactam is treated in an emulsion separator having a membrane to physically separate and remove the water-insoluble emulsion component, and (2 A polyacrylamide-based polymer coagulant is added to the aqueous solution to separate and remove the water-soluble oil component as an agglomerate, and (3) recovering lactam as a normal potassium permanganate, activated carbon treatment and distillation. Recovery of lactam from one polyamide. 제1항에 있어서, 폴리아크릴아미드계 고분자응집제의 첨가량은 락탐에 대하여 0.05∼10.0중량%인 것을 특징으로 하는 방법.The method according to claim 1, wherein the amount of the polyacrylamide-based polymer coagulant added is 0.05 to 10.0 wt% based on the lactam. 제1항에 있어서, 유제분리기는 3개 이상의 분리막을 갖는 것을 특징으로 하는 방법.The method of claim 1 wherein the emulsion separator has at least three separators. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019920019463A 1992-10-22 1992-10-22 Process of recovering lactam from polyamide waste yarn containing spinning oil KR950006148B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019920019463A KR950006148B1 (en) 1992-10-22 1992-10-22 Process of recovering lactam from polyamide waste yarn containing spinning oil

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019920019463A KR950006148B1 (en) 1992-10-22 1992-10-22 Process of recovering lactam from polyamide waste yarn containing spinning oil

Publications (2)

Publication Number Publication Date
KR940009145A true KR940009145A (en) 1994-05-20
KR950006148B1 KR950006148B1 (en) 1995-06-09

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019920019463A KR950006148B1 (en) 1992-10-22 1992-10-22 Process of recovering lactam from polyamide waste yarn containing spinning oil

Country Status (1)

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KR (1) KR950006148B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100316687B1 (en) * 1994-12-27 2002-02-19 전 원 중 Purification method of low purity caprolactam containing organic impurities

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101130461B1 (en) * 2009-12-15 2012-04-12 주식회사 효성 Method for Recycling Wasted Nylon Fish Net and Recycled Nylon filament fiber

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100316687B1 (en) * 1994-12-27 2002-02-19 전 원 중 Purification method of low purity caprolactam containing organic impurities

Also Published As

Publication number Publication date
KR950006148B1 (en) 1995-06-09

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