公开(公告)号：US5700358A

公开(公告)日：1997-12-23

申请号：US396623

申请日：1995-03-01

Applicant: Hugo Fuchs ,  Josef Ritz ,  Gerald Neubauer

Inventor： Hugo Fuchs ,  Josef Ritz ,  Gerald Neubauer

IPC: C07D201/12 ,  C07D201/16 ,  C08G69/14 ,  C08G69/46 ,  B01D3/34

CPC classification number: C07D201/12 ,  C07D201/16

Abstract: Caprolactam is recovered from oligomers and/or polymers of caprolactam by cleavage of oligomers and/or polymers of caprolactam and subsequent working up by distillation of the caprolactam obtained in the cleavage, by a process including (a) cleaving oligomers and/or polymers of caprolactam to obtain an aqueous reaction mixture which contains caprolactam, (b) removing water from the reaction mixture obtained under (a) to obtain a residue, (c) distilling the residue obtained under (b) in an acidic medium and (d) then distilling the distillate in an alkaline medium to obtain caprolactam, or (c') distilling the residue obtained under (b) in an alkaline medium and (d') then distilling the distillate in an acidic medium to obtain caprolactam.

Abstract translation: 通过裂解己内酰胺的低聚物和/或聚己内酯并随后通过蒸馏在切割中获得的己内酰胺来处理己内酰胺从己内酰胺的低聚物和/或聚合物中回收己内酰胺，方法包括（a）裂解己内酰胺的低聚物和/或聚合物 得到含有己内酰胺的水性反应混合物，（b）从（a）得到的反应混合物中除去水，得到残渣，（c）将酸性介质中的（b）得到的残渣蒸馏，然后蒸馏 在碱性介质中的馏出物得到己内酰胺，或（c'）将在（b）获得的残余物在碱性介质中蒸馏，然后（d'），然后在酸性介质中蒸馏出馏出物，得到己内酰胺。

公开(公告)号：US5656757A

公开(公告)日：1997-08-12

申请号：US511334

申请日：1995-08-10

Applicant: Theodore John Jenczewski ,  Lamberto Crescentini ,  Richard Eugene Mayer

Inventor： Theodore John Jenczewski ,  Lamberto Crescentini ,  Richard Eugene Mayer

IPC: C07D201/12

CPC classification number: C07D201/12

Abstract: A process for recovering monomer from multi-component waste material that includes a hydrolyzable polymer, includes contacting the multi-component waste material with water and subjecting the resulting mixture to heat and pressure to form a liquid aqueous portion and a water insoluble portion. The liquid aqueous portion mainly includes depolymerization products of the hydrolyzable polymer, and the water insoluble portion mainly includes components other than the depolymerization products. This mixture is cooled and the liquid aqueous portion and the water insoluble portion are separated. Monomer that formed the hydrolyzable polymer is recovered from the liquid aqueous solution.

Abstract translation: 一种从包含可水解聚合物的多组分废料中回收单体的方法，包括使多组分废料与水接触并对所得混合物进行加热和加压以形成液体水性部分和水不溶性部分。 液体水性部分主要包括可水解聚合物的解聚产物，水不溶性部分主要包括解聚产物以外的成分。 将该混合物冷却，分离液体水性部分和水不溶性部分。 形成可水解聚合物的单体从液体水溶液中回收。

公开(公告)号：US5495014A

公开(公告)日：1996-02-27

申请号：US358412

申请日：1994-12-19

Applicant: Eberhard Fuchs ,  Tom Witzel

Inventor： Eberhard Fuchs ,  Tom Witzel

IPC: C07D201/12

CPC classification number: C07D201/12

Abstract: Caprolactam is prepared by cleaving oligomers or polymers containing essentially the repeating unit --[--N(H)-(CH.sub.2).sub.5 --C(O)--]- in the presence of a catalyst at elevated temperatures by a process in which the cleavage is carried out in the liquid phase in the presence of a heterogeneous catalyst and of an organic solvent.

Abstract translation: 己内酰胺通过在催化剂存在下在升高的温度下裂解基本上含有重复单元 - [ - N（H） - （CH 2）5 -C（O） - ] - 的低聚物或聚合物来制备， 在非均相催化剂和有机溶剂的存在下在液相中进行。

公开(公告)号：US5457197A

公开(公告)日：1995-10-10

申请号：US225273

申请日：1994-04-08

Applicant: Stylianos Sifniades ,  Alan B. Levy

Inventor： Stylianos Sifniades ,  Alan B. Levy

IPC: C07D201/12

CPC classification number: C07D201/12

Abstract: A process for recovering monomer from multi-component waste material that includes a hydrolyzable polymer, the process including contacting the multi-component waste material with water and subjecting the resulting mixture to heat and pressure to form a liquid aqueous portion which mainly includes depolymerization products of the hydrolyzable polymer and a water insoluble portion which mainly includes components other than the depolymerization products; separating the liquid aqueous portion and the water insoluble portion; subjecting the separated aqueous portion to a pressure that is lower than that of step (a) and heat to produce a residue and a distillate which contains monomer; and separating the monomer in the distillate from other components in the distillate. The process is particularly useful for recovering caprolactam from waste materials that include nylon 6.

Abstract translation: 一种从包含可水解聚合物的多组分废料中回收单体的方法，该方法包括使多组分废料与水接触并使所得混合物进行加热和加压以形成液体水性部分，其主要包括： 可水解聚合物和水不溶部分，其主要包括解聚产物以外的成分; 分离液体水性部分和水不溶部分; 将分离的水分部分的压力低于步骤（a）的压力，加热以产生残余物和含有单体的馏出物; 并将馏出物中的单体与馏出物中的其它组分分离。 该方法对于从包括尼龙6的废料回收己内酰胺是特别有用的。

公开(公告)号：US5310905A

公开(公告)日：1994-05-10

申请号：US45780

申请日：1993-04-14

Applicant: Edward F. Moran, Jr.

Inventor： Edward F. Moran, Jr.

IPC: C07C51/347 ,  C07C55/14 ,  C07D201/12

CPC classification number: C07D201/12 ,  C07C51/347 ,  C07C55/14

Abstract: Waste nylon 6 and/or nylon 6,6 are treated with aliphatic monocarboxylic acid to depolymerize the polymer to desirable monomer.

Abstract translation: 将废尼龙6和/或尼龙6,6用脂肪族单羧酸处理以将聚合物解聚为所需的单体。

公开(公告)号：US2840606A

公开(公告)日：1958-06-24

申请号：US50173655

申请日：1955-04-15

Applicant: DU PONT

Inventor： MILLER BRUCE M

IPC: C07C51/06 ,  C07D201/12

CPC classification number: C07D201/12 ,  C07C51/06 ,  C07C55/14

公开(公告)号：US2806848A

公开(公告)日：1957-09-17

申请号：US2806848D

CPC classification number: C07D201/12

公开(公告)号：US07538143B2

公开(公告)日：2009-05-26

申请号：US10897473

申请日：2004-07-23

Applicant: Rudolf Kämpf ,  Reinhard Wolf ,  Joachim Seelig

Inventor： Rudolf Kämpf ,  Reinhard Wolf ,  Joachim Seelig

IPC: C08J11/04

CPC classification number: C07D201/12

Abstract: The invention relates to a method for the treatment of waste containing polyamide comprising a) depolymerisation of the waste containing polyamide, whereby a caprolactam raw material (6) and a flow (3), comprising the secondary constituents and additives from the depolymerisation, are obtained, and b) leaching of the flow (3) at least once using an extracting agent.

Abstract translation: 本发明涉及一种处理含有聚酰胺的废物的方法，包括：a）含有聚酰胺的废物的解聚，由此获得包含来自解聚的第二组分和添加剂的己内酰胺原料（6）和流动物（3） ，和b）使用提取剂至少一次浸出所述流（3）。

公开(公告)号：US20040024204A1

公开(公告)日：2004-02-05

申请号：US10457831

申请日：2003-06-09

Applicant: ZIMMER AKTIENGESELLSCHAFT

Inventor： Claus Born ,  Rudolf Kampf ,  Joachim Seelig ,  Reinhard Wolf

IPC: C07D201/02

CPC classification number: C07D201/12

Abstract: This invention relates to a continuous and efficient method for the manufacture of highly pure caprolactam suitable for the polycondensation of Polyamide 6 (polycaprolactam) from polyamide waste. In particular the invention relates to a method for the manufacture of caprolactam from waste containing polyamides, including the steps a) depolymerisation of the waste containing polyamides, whereby a caprolactam raw material and a flow containing secondary constituents or additives is obtained, b) at least one distillation of the caprolactam raw material, and c) at least one crystallisation of the caprolactam material obtained in step b), by which means caprolactam is obtained, whereby at least part of the caprolactam obtained in step c) with a permanganate number of

Abstract translation: 本发明涉及用于制备适用于聚酰胺废物聚酰胺6（聚己内酰胺）缩聚的高纯度己内酰胺的连续和有效的方法。 具体地说，本发明涉及一种从含有聚酰胺的废物中制造己内酰胺的方法，包括以下步骤：a）对含有废物的聚酰胺进行解聚，由此得到己内酰胺原料和含有二级成分或添加剂的流体，b）至少 己内酰胺原料的一次蒸馏，和c）步骤b）中获得的己内酰胺材料的至少一种结晶，通过该方法获得己内酰胺，由此至少部分步骤c）中获得的己内酰胺的高锰酸盐数目< 10000秒 并且在解聚之前和/或期间，将含有<85％的UV透射率加入到含废物的聚酰胺中。

公开(公告)号：US06498250B2

公开(公告)日：2002-12-24

申请号：US09983218

申请日：2001-10-23

Applicant: Leonardus J. G. Raets ,  Marco J. A. Houben ,  Michel J. G. Huys ,  Antonius C. Berghmans

Inventor： Leonardus J. G. Raets ,  Marco J. A. Houben ,  Michel J. G. Huys ,  Antonius C. Berghmans

IPC: C07D20112

CPC classification number: C07D201/12 ,  C08J11/14 ,  C08J2377/04 ,  Y02W30/704

Abstract: The invention relates to a process for nylon depolymerization, in which process a multi-component material, comprising nylon and one or more non-nylon components, is fed to a depolymerization zone in which depolymerization of at least part of said nylon is effected, resulting in a product stream and a residue, said product stream containing monomers of said nylon, said residue containing non-nylon components, wherein the nylon content in the residue is measured and used to control the depolymerization process.