NL1006575C2 - Depolymeriseren van polyamiden. - Google Patents

Depolymeriseren van polyamiden. Download PDF

Info

Publication number: NL1006575C2
Authority: NL; Netherlands
Prior art keywords: alcohol; depolymerization; process according; polyamide; polyamides
Prior art date: 1997-07-14

Application number

NL1006575A

Other languages

English (en)

Dutch (nl)

Inventor

Martin Booij

Yvonne Helene Frentzen

Bart Kurt Stefaan Hommez

Eric Jozef Goethals

Original Assignee

Dsm Nv

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.)

1997-07-14

Filing date

1997-07-14

Publication date

1999-01-15

1997-07-14 Application filed by Dsm Nv filed Critical Dsm Nv

1997-07-14 Priority to NL1006575A priority Critical patent/NL1006575C2/nl

1998-07-01 Priority to EP19980202204 priority patent/EP0891969B1/de

1998-07-01 Priority to DE69805575T priority patent/DE69805575T2/de

1998-07-01 Priority to AT98202204T priority patent/ATE218123T1/de

1998-07-10 Priority to JP22922798A priority patent/JPH11152266A/ja

1998-07-10 Priority to BR9802430A priority patent/BR9802430A/pt

1998-07-10 Priority to CA 2243126 priority patent/CA2243126A1/en

1998-07-10 Priority to KR1019980028503A priority patent/KR19990013862A/ko

1998-07-10 Priority to ID980981A priority patent/ID20585A/id

1998-07-13 Priority to CN98103334A priority patent/CN1210855A/zh

1998-07-13 Priority to CZ982203A priority patent/CZ220398A3/cs

1998-07-13 Priority to EA199800561A priority patent/EA001381B1/ru

1998-07-13 Priority to TR1998/01353A priority patent/TR199801353A2/xx

1998-07-14 Priority to US09/115,234 priority patent/US6020486A/en

1998-07-14 Priority to PL32747898A priority patent/PL327478A1/xx

1998-07-15 Priority to TW87111543A priority patent/TW459005B/zh

1999-01-15 Application granted granted Critical

1999-01-15 Publication of NL1006575C2 publication Critical patent/NL1006575C2/nl

Links

229920002647 polyamide Polymers 0.000 title claims abstract description 33
239000004952 Polyamide Substances 0.000 title claims abstract description 30
238000000034 method Methods 0.000 claims abstract description 31
239000002699 waste material Substances 0.000 claims abstract description 14
239000003054 catalyst Substances 0.000 claims abstract description 9
DNIAPMSPPWPWGF-GSVOUGTGSA-N (R)-(-)-Propylene glycol Chemical compound C[C@@H](O)CO DNIAPMSPPWPWGF-GSVOUGTGSA-N 0.000 claims abstract description 3
LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 42
LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 24
JBKVHLHDHHXQEQ-UHFFFAOYSA-N epsilon-caprolactam Chemical compound O=C1CCCCCN1 JBKVHLHDHHXQEQ-UHFFFAOYSA-N 0.000 claims description 22
OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 12
NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical group OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 10
229910000147 aluminium phosphate Inorganic materials 0.000 claims description 5
XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
-1 alkali metal salt Chemical class 0.000 claims description 3
125000004432 carbon atom Chemical group C* 0.000 claims description 3
ISIJQEHRDSCQIU-UHFFFAOYSA-N tert-butyl 2,7-diazaspiro[4.5]decane-7-carboxylate Chemical compound C1N(C(=O)OC(C)(C)C)CCCC11CNCC1 ISIJQEHRDSCQIU-UHFFFAOYSA-N 0.000 claims description 3
229910052783 alkali metal Inorganic materials 0.000 claims description 2
238000006243 chemical reaction Methods 0.000 description 13
HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 9
WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 8
DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 6
150000001298 alcohols Chemical class 0.000 description 6
229920002292 Nylon 6 Polymers 0.000 description 5
239000000178 monomer Substances 0.000 description 5
239000002253 acid Substances 0.000 description 4
239000001361 adipic acid Substances 0.000 description 4
235000011037 adipic acid Nutrition 0.000 description 4
NAQMVNRVTILPCV-UHFFFAOYSA-N hexane-1,6-diamine Chemical compound NCCCCCCN NAQMVNRVTILPCV-UHFFFAOYSA-N 0.000 description 4
238000012958 reprocessing Methods 0.000 description 4
PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 3
DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 3
239000003518 caustics Substances 0.000 description 3
238000012691 depolymerization reaction Methods 0.000 description 3
238000004821 distillation Methods 0.000 description 3
239000000835 fiber Substances 0.000 description 3
239000002243 precursor Substances 0.000 description 3
239000000047 product Substances 0.000 description 3
229910052708 sodium Inorganic materials 0.000 description 3
239000011734 sodium Substances 0.000 description 3
235000011121 sodium hydroxide Nutrition 0.000 description 3
IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 2
229920002302 Nylon 6,6 Polymers 0.000 description 2
QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
XXROGKLTLUQVRX-UHFFFAOYSA-N allyl alcohol Chemical compound OCC=C XXROGKLTLUQVRX-UHFFFAOYSA-N 0.000 description 2
150000001875 compounds Chemical class 0.000 description 2
238000005520 cutting process Methods 0.000 description 2
238000004519 manufacturing process Methods 0.000 description 2
239000000203 mixture Substances 0.000 description 2
229920000642 polymer Polymers 0.000 description 2
229920000137 polyphosphoric acid Polymers 0.000 description 2
238000000926 separation method Methods 0.000 description 2
159000000000 sodium salts Chemical class 0.000 description 2
238000005292 vacuum distillation Methods 0.000 description 2
SLXKOJJOQWFEFD-UHFFFAOYSA-N 6-aminohexanoic acid Chemical compound NCCCCCC(O)=O SLXKOJJOQWFEFD-UHFFFAOYSA-N 0.000 description 1
240000000491 Corchorus aestuans Species 0.000 description 1
235000011777 Corchorus aestuans Nutrition 0.000 description 1
235000010862 Corchorus capsularis Nutrition 0.000 description 1
239000004743 Polypropylene Substances 0.000 description 1
RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
150000007513 acids Chemical class 0.000 description 1
229960002684 aminocaproic acid Drugs 0.000 description 1
150000003863 ammonium salts Chemical class 0.000 description 1
KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
239000004327 boric acid Substances 0.000 description 1
235000010216 calcium carbonate Nutrition 0.000 description 1
229910000019 calcium carbonate Inorganic materials 0.000 description 1
238000001816 cooling Methods 0.000 description 1
230000001419 dependent effect Effects 0.000 description 1
230000000694 effects Effects 0.000 description 1
238000001914 filtration Methods 0.000 description 1
239000007789 gas Substances 0.000 description 1
238000000227 grinding Methods 0.000 description 1
239000004816 latex Substances 0.000 description 1
229920000126 latex Polymers 0.000 description 1
229910052757 nitrogen Inorganic materials 0.000 description 1
WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 1
239000002798 polar solvent Substances 0.000 description 1
238000006116 polymerization reaction Methods 0.000 description 1
229920001155 polypropylene Polymers 0.000 description 1
239000002244 precipitate Substances 0.000 description 1
238000002360 preparation method Methods 0.000 description 1
238000012545 processing Methods 0.000 description 1
238000000746 purification Methods 0.000 description 1
238000001953 recrystallisation Methods 0.000 description 1
150000003839 salts Chemical class 0.000 description 1
238000005070 sampling Methods 0.000 description 1
229920006395 saturated elastomer Polymers 0.000 description 1
KYKFCSHPTAVNJD-UHFFFAOYSA-L sodium adipate Chemical group [Na+].[Na+].[O-]C(=O)CCCCC([O-])=O KYKFCSHPTAVNJD-UHFFFAOYSA-L 0.000 description 1
239000001601 sodium adipate Substances 0.000 description 1
235000011049 sodium adipate Nutrition 0.000 description 1
229940023144 sodium glycolate Drugs 0.000 description 1
239000002904 solvent Substances 0.000 description 1
238000001256 steam distillation Methods 0.000 description 1
239000010936 titanium Substances 0.000 description 1
229910052719 titanium Inorganic materials 0.000 description 1
JEJAMASKDTUEBZ-UHFFFAOYSA-N tris(1,1,3-tribromo-2,2-dimethylpropyl) phosphate Chemical compound BrCC(C)(C)C(Br)(Br)OP(=O)(OC(Br)(Br)C(C)(C)CBr)OC(Br)(Br)C(C)(C)CBr JEJAMASKDTUEBZ-UHFFFAOYSA-N 0.000 description 1

Classifications

- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J11/00—Recovery or working-up of waste materials
- C08J11/04—Recovery or working-up of waste materials of polymers
- C08J11/10—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation
- C08J11/18—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material
- C08J11/22—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material by treatment with organic oxygen-containing compounds
- C08J11/24—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material by treatment with organic oxygen-containing compounds containing hydroxyl groups
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C209/00—Preparation of compounds containing amino groups bound to a carbon skeleton
- C07C209/44—Preparation of compounds containing amino groups bound to a carbon skeleton by reduction of carboxylic acids or esters thereof in presence of ammonia or amines, or by reduction of nitriles, carboxylic acid amides, imines or imino-ethers
- C07C209/50—Preparation of compounds containing amino groups bound to a carbon skeleton by reduction of carboxylic acids or esters thereof in presence of ammonia or amines, or by reduction of nitriles, carboxylic acid amides, imines or imino-ethers by reduction of carboxylic acid amides
- 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
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2377/00—Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/20—Recycled plastic
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling

Landscapes

Chemical & Material Sciences (AREA)
Organic Chemistry (AREA)
Medicinal Chemistry (AREA)
Sustainable Development (AREA)
Health & Medical Sciences (AREA)
Chemical Kinetics & Catalysis (AREA)
Life Sciences & Earth Sciences (AREA)
Polymers & Plastics (AREA)
Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
Polyamides (AREA)
Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Artificial Filaments (AREA)
Catalysts (AREA)

NL1006575A 1997-07-14 1997-07-14 Depolymeriseren van polyamiden. NL1006575C2 (nl)

Priority Applications (16)

Application Number	Priority Date	Filing Date	Title
NL1006575A NL1006575C2 (nl)	1997-07-14	1997-07-14	Depolymeriseren van polyamiden.
DE69805575T DE69805575T2 (de)	1997-07-14	1998-07-01	Depolymerisation von Polyamiden
AT98202204T ATE218123T1 (de)	1997-07-14	1998-07-01	Depolymerisation von polyamiden
EP19980202204 EP0891969B1 (de)	1997-07-14	1998-07-01	Depolymerisation von Polyamiden
KR1019980028503A KR19990013862A (ko)	1997-07-14	1998-07-10	폴리아미드의 해중합화 방법
CA 2243126 CA2243126A1 (en)	1997-07-14	1998-07-10	Depolymerization of polyamides
JP22922798A JPH11152266A (ja)	1997-07-14	1998-07-10	ポリアミドの解重合
ID980981A ID20585A (id)	1997-07-14	1998-07-10	Depolimerisasi poliamida
BR9802430A BR9802430A (pt)	1997-07-14	1998-07-10	Despolimerização de poliamidas.
CZ982203A CZ220398A3 (cs)	1997-07-14	1998-07-13	Způsob depolymerizace polyamidů
CN98103334A CN1210855A (zh)	1997-07-14	1998-07-13	聚酰胺解聚
EA199800561A EA001381B1 (ru)	1997-07-14	1998-07-13	Способ деполимеризации полиамидов
TR1998/01353A TR199801353A2 (xx)	1997-07-14	1998-07-13	Poliamidlerin Depolimerizasyonu.
US09/115,234 US6020486A (en)	1997-07-14	1998-07-14	Depolymerization of polyamides
PL32747898A PL327478A1 (en)	1997-07-14	1998-07-14	Method of depolymerising polyamides
TW87111543A TW459005B (en)	1997-07-14	1998-07-15	Depolymerisation of polyamides

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
NL1006575A NL1006575C2 (nl)	1997-07-14	1997-07-14	Depolymeriseren van polyamiden.
NL1006575		1997-07-14

Publications (1)

Publication Number	Publication Date
NL1006575C2 true NL1006575C2 (nl)	1999-01-15

Family

ID=19765347

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
NL1006575A NL1006575C2 (nl)	1997-07-14	1997-07-14	Depolymeriseren van polyamiden.

Country Status (16)

Country	Link
US (1)	US6020486A (de)
EP (1)	EP0891969B1 (de)
JP (1)	JPH11152266A (de)
KR (1)	KR19990013862A (de)
CN (1)	CN1210855A (de)
AT (1)	ATE218123T1 (de)
BR (1)	BR9802430A (de)
CA (1)	CA2243126A1 (de)
CZ (1)	CZ220398A3 (de)
DE (1)	DE69805575T2 (de)
EA (1)	EA001381B1 (de)
ID (1)	ID20585A (de)
NL (1)	NL1006575C2 (de)
PL (1)	PL327478A1 (de)
TR (1)	TR199801353A2 (de)
TW (1)	TW459005B (de)

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US6182913B1 (en)	1999-01-25	2001-02-06	Interface, Inc.	Method and apparatus for reclaiming carpet components
DE60121948T2 (de) *	2000-06-08	2007-03-15	E.I. Du Pont De Nemours And Co., Wilmington	Auf lösungsmittel basierende rückgewinnung und wiederverwertung eines polyamidmaterials
DE10029422A1 (de) *	2000-06-15	2001-12-20	Andreas Hornung	Einstufiges Verfahren zur Rückgewinnung von hochreinem epsilon-Caprolactam aus Teppichböden oder Mischfasern
JP3994660B2 (ja) *	2000-12-22	2007-10-24	日立化成工業株式会社	不飽和ポリエステル樹脂硬化物用分解処理液、該処理液を用いた不飽和ポリエステル樹脂硬化物の処理方法及び複合材料の分離方法
KR101160352B1 (ko) *	2004-03-26	2012-06-26	김도균	폴리에스테르와 폴리아미드 혼성 폐기물을 재활용한 고기능성 수지 및 그 제조방법
JP5016234B2 (ja)	2005-11-25	2012-09-05	国立大学法人山口大学	ポリアミドの解重合方法及びポリアミドのモノマーの製造方法
US20090124824A1 (en) *	2006-01-31	2009-05-14	Yamaguchi University	Process for producing 6-hydroxycaproic ester and process for producing trialkylamine
US8113448B2 (en) *	2009-04-22	2012-02-14	Keating Joseph Z	Methods of recycling carpet components and carpet components formed thereform
US20110040027A1 (en) *	2009-04-22	2011-02-17	Keating Joseph Z	Methods of recycling carpet components and products formed therefrom
US20100273001A1 (en) *	2009-04-22	2010-10-28	Keating Joseph Z	Method of Recycling Carpet Components and Carpet Components formed Therefrom
CN104017205B (zh) *	2014-06-11	2017-01-18	李兆顺	一种再生尼龙的方法
NL2015749B1 (en) *	2015-11-09	2017-05-26	Ioniqa Tech B V	PA/PET separation process.
PL239015B1 (pl) *	2017-10-06	2021-10-25	Politechnika Gdanska	Sposób dekompozycji termochemicznej poliamidów
CN109553561B (zh) *	2018-11-28	2020-07-28	四川塑金科技有限公司	再生衣服面料的制备方法及面料
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JP7569929B2 (ja) *	2020-09-16	2024-10-18	エボニックオペレーションズゲーエムベーハー	純ポリラウロラクタムを酸加水分解する方法
DE102021203743A1 (de)	2021-04-15	2022-10-20	Evonik Functional Solutions Gmbh	Verfahren zur Solvolyse von Polyamiden mit Alkalimetallalkoholaten
CN113512193B (zh) *	2021-04-30	2022-05-06	东华大学	一种废弃聚酰胺6醇解再生的方法
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WO2023074437A1 (ja) *	2021-10-29	2023-05-04	東レ株式会社	ε－カプロラクタムおよびポリアミド６オリゴマーの回収方法、ならびにポリアミド６の製造方法
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WO2023120427A1 (ja) *	2021-12-23	2023-06-29	旭化成株式会社	解重合方法
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WO2026003376A2 (en) *	2024-06-28	2026-01-02	Katholieke Universiteit Leuven	A method for separating polyamide from a waste stream primarily composed of a mixture of polymeric matter
KR20260024275A (ko) *	2024-08-13	2026-02-20	한국화학연구원	아미드 작용기를 가진 고분자의 해중합 촉매 및 이를 이용한 해중합 방법
KR20260038525A (ko) *	2024-09-12	2026-03-19	한국화학연구원	산화규소가 포함된 폴리아미드 해중합용 촉매 및 이를 이용한 해중합 방법

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GB1017985A (en) *	1963-02-18	1966-01-26	Allied Chem	Process for the recovery of ª-caprolactam from polycaprolactams
DE1235924B (de) *	1962-07-25	1967-03-09	Basf Ag	Verfahren zur Rueckgewinnung von Lactamen aus Polyamiden
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)

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1998
- 1998-07-01 DE DE69805575T patent/DE69805575T2/de not_active Expired - Lifetime
- 1998-07-01 AT AT98202204T patent/ATE218123T1/de not_active IP Right Cessation
- 1998-07-01 EP EP19980202204 patent/EP0891969B1/de not_active Expired - Lifetime
- 1998-07-10 KR KR1019980028503A patent/KR19990013862A/ko not_active Withdrawn
- 1998-07-10 ID ID980981A patent/ID20585A/id unknown
- 1998-07-10 JP JP22922798A patent/JPH11152266A/ja active Pending
- 1998-07-10 CA CA 2243126 patent/CA2243126A1/en not_active Abandoned
- 1998-07-10 BR BR9802430A patent/BR9802430A/pt not_active IP Right Cessation
- 1998-07-13 CN CN98103334A patent/CN1210855A/zh active Pending
- 1998-07-13 EA EA199800561A patent/EA001381B1/ru not_active IP Right Cessation
- 1998-07-13 TR TR1998/01353A patent/TR199801353A2/xx unknown
- 1998-07-13 CZ CZ982203A patent/CZ220398A3/cs unknown
- 1998-07-14 PL PL32747898A patent/PL327478A1/xx unknown
- 1998-07-14 US US09/115,234 patent/US6020486A/en not_active Expired - Lifetime
- 1998-07-15 TW TW87111543A patent/TW459005B/zh active

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Also Published As

Publication number	Publication date
PL327478A1 (en)	1999-01-18
EA199800561A1 (ru)	1999-02-25
BR9802430A (pt)	2000-01-18
EP0891969B1 (de)	2002-05-29
JPH11152266A (ja)	1999-06-08
ID20585A (id)	1999-01-21
TR199801353A2 (xx)	1999-02-22
CZ220398A3 (cs)	1999-02-17
DE69805575D1 (de)	2002-07-04
EA001381B1 (ru)	2001-02-26
EP0891969A1 (de)	1999-01-20
TW459005B (en)	2001-10-11
DE69805575T2 (de)	2003-01-30
CN1210855A (zh)	1999-03-17
ATE218123T1 (de)	2002-06-15
CA2243126A1 (en)	1999-01-14
KR19990013862A (ko)	1999-02-25
US6020486A (en)	2000-02-01

Legal Events

Date	Code	Title	Description
1999-03-01	PD2B	A search report has been drawn up
2003-04-01	VD1	Lapsed due to non-payment of the annual fee	Effective date: 20030201

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NL1000781C2 (nl)	1997-01-14	Werkwijze voor het winnen van caprolactam uit nylon-6 bevattende afval.
EP0662466A1 (de)	1995-07-12	Kontinuierliches Verfahren zur Gewinnung von Terephthalsäure aus Abfällen oder gebrauchten Produkten aus Polyalkylenterephthalat Polymeren
US6087494A (en)	2000-07-11	Depolymerization of polyamides
US5077381A (en)	1991-12-31	Constant compositioin recycle of nylon 6 polymerization wash water
WO1994008942A1 (en)	1994-04-28	Depolymerization of nylon 6,6 (and optionally) nylon 6 to obtain hexamethylene diamine (and caprolactam)
US5218080A (en)	1993-06-08	Constant composition recycle of nylon 6 polymerization wash water
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