公开(公告)号：US3925365A

公开(公告)日：1975-12-09

申请号：US44106174

申请日：1974-02-11

Applicant: KANEBO LTD

Inventor： IZAWA NOBUO ,  KOHNO TOSHIHIKO

IPC: C07D201/12 ,  C07D201/16

CPC classification number: C07D201/12 ,  C07D201/16

Abstract: Epsilon -CAPROLACTAM MATERIAL SUCH AS A MONOMER, OLIGOMERS AND POLYMERS OF Epsilon -CAPROLACTAM AND MIXTURES OF THESE COMPOUNDS ARE PURIFIED FROM IMPURITY COMPOUNDS SUCH AS PHOSPHORIC ACID AND IONIZED METAL COMPOUNDS CONTAINED THEREIN BY BRINGING THE Epsilon -CAPROLACTAM MATERIAL INTO CONTACT WITH AN AQUEOUS SOLUTION CONTAINING 15 TO 75 PERCENT BY WEIGHT OF AT LEAST ONE ALKALI METAL PHOSPHATE TO EXTRACT THE IMPURITY COMPOUND FROM THE Epsilon -CAPROLACTAM MATERIAL INTO THE PHOSPHATE AQUEOUS SOLUTION AND, THEREAFTER, SEPARATING THE Epsilon -CAPROLACTAM MATERIAL FROM THE PHOSPHATE AQUEOUS SOLUTION BY WAY OF SETTLING OR CENTRIFUGING THE MIXTURE.

Abstract translation: ε-CABROLACTAM材料如EPS-CABROLACTAM的单体，低聚物和聚合物以及这些化合物的混合物，通过使ε-CABROLACTAM材料与含有AQUEOUS溶液接触的方式从包含在其中的酸性化合物和非离子化的金属化合物等净化化合物中纯化。 以至少一种碱金属磷酸盐的重量计为15至75％，以将来自ε-磷酸铵材料的重量化合物从磷酸盐水溶液中萃取，并且通过沉降或离心方式从磷酸盐水溶液中分离出ε-吡咯烷酮材料 混合物。

公开(公告)号：US2806847A

公开(公告)日：1957-09-17

申请号：US2806847D

CPC classification number: C07D201/12

公开(公告)号：US08193348B2

公开(公告)日：2012-06-05

申请号：US12474968

申请日：2009-05-29

Applicant: Chien-Hsien Li

Inventor： Chien-Hsien Li

IPC: C07D201/16

CPC classification number: C07D201/16 ,  C07D201/12

Abstract: A system and a method for recovering caprolactam from a rearrangement mixture are provided. The system includes a neutralization unit; a buffering unit for receiving a crude lactam solution containing impurities content below a standard value and being fed from the neutralization unit; a temporary storage unit for receiving a crude lactam solution containing impurities above the standard value and being fed from the neutralization unit; a temporary extraction unit for performing batch extraction to separate out a first lactam solution; an extraction unit for performing continuous extraction to separate out a second lactam solution; and a recovery unit for allowing caprolactam to be recovered. In the present system and method, the crude lactam solution is selectively fed into the extraction unit for continuous extraction or to the temporary extraction unit for batch extraction, thereby maintaining continuity of operation, enhancing separation efficiency, and reducing both material consumption and purification loadings.

Abstract translation: 提供了从重排混合物中回收己内酰胺的体系和方法。 该系统包括中和单元; 缓冲单元，用于接收含有低于标准值的杂质含量的粗内酰胺溶液并从中和单元进料; 临时存储单元，用于接收含有高于标准值的杂质的粗内酰胺溶液并从中和单元进料; 临时提取单元，用于进行分批提取以分离出第一内酰胺溶液; 提取单元，用于进行连续提取以分离第二内酰胺溶液; 和用于使己内酰胺回收的回收单元。 在本系统和方法中，将粗内酰胺溶液选择性地进料到用于连续萃取的提取单元中或者用于批量提取的临时提取单元，从而保持操作的连续性，提高分离效率，并减少材料消耗和净化负荷。

公开(公告)号：US20050054739A1

公开(公告)日：2005-03-10

申请号：US10897473

申请日：2004-07-23

Applicant: Rudolf Kampf ,  Reinhard Wolf ,  Joachim Seelig

Inventor： Rudolf Kampf ,  Reinhard Wolf ,  Joachim Seelig

IPC: C07D201/12 ,  C08F6/00

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：US20020038023A1

公开(公告)日：2002-03-28

申请号：US09983218

申请日：2001-10-23

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

IPC: C07D223/10

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.

Abstract translation: 本发明涉及一种用于尼龙解聚的方法，其中将包含尼龙和一种或多种非尼龙组分的多组分材料进料到解聚区，其中至少部分所述尼龙的解聚得到实现， 在产物流和残余物中，所述产物流含有所述尼龙单体，所述残余物含有非尼龙组分，其中测量残余物中的尼龙含量并用于控制解聚过程。

公开(公告)号：US5932724A

公开(公告)日：1999-08-03

申请号：US843502

申请日：1997-04-16

Applicant: Stylianos Sifniades ,  Alan Bart Levy ,  Jan Agnes Jozef Hendrix

Inventor： Stylianos Sifniades ,  Alan Bart Levy ,  Jan Agnes Jozef Hendrix

IPC: C07D201/12

CPC classification number: C07D201/12

Abstract: The present invention provides an efficient process for the recovery of caprolactam from polycaprolactam-containing waste material. The present process for depolymerizing multi-component waste material comprising polycaprolactam and non-polycaprolactam components to form caprolactam comprises the step of: in the absence of added catalyst, contacting the multi-component waste material with superheated steam at a temperature of about 250.degree. C. to about 400.degree. C. and at a pressure within the range of about 1 atm to about 100 atm and substantially less than the saturated vapor pressure of water at the temperature wherein a caprolactam-containing vapor stream is formed. The formed caprolactam may then be used in the production of engineered resins and fibers.

Abstract translation: 本发明提供了一种从含有聚己内酰胺的废料中回收己内酰胺的有效方法。 用于解聚包含聚己内酰胺和非聚己内酰胺组分以形成己内酰胺的多组分废料的本方法包括以下步骤：在不加入催化剂的情况下，将多组分废料与过热蒸汽在约250℃的温度下接触 约400℃，并且在约1atm至约100atm范围内的压力下，并且基本上小于在其中形成含己内酰胺的蒸气流的温度下的饱和蒸气压。 然后，所形成的己内酰胺可以用于工程化树脂和纤维的生产。

公开(公告)号：US5455346B1

公开(公告)日：1999-02-09

申请号：US35528394

申请日：1994-12-12

Applicant: BASF CORP

Inventor： KOPIETZ MICHAEL ,  KALCK ULRICH ,  JONES SIMON ,  BASSLER PETER ,  PRIESTER CLAUS-ULRICH

IPC: C07D201/12

CPC classification number: C07D201/12

公开(公告)号：US5359062A

公开(公告)日：1994-10-25

申请号：US54064

申请日：1993-04-29

Applicant: Hugo Fuchs ,  Gerald Neubauer ,  Josef Ritz ,  Claus-Ulrich Priester

Inventor： Hugo Fuchs ,  Gerald Neubauer ,  Josef Ritz ,  Claus-Ulrich Priester

IPC: C07D201/12 ,  C08G69/14

CPC classification number: C07D201/12

Abstract: Caprolactam is recovered from polycaprolactam by hydrolyric cleavage of polycaprolactam with from 5 to 50 parts by weight of water per part by weight of polycaprolactam at from 200.degree. to 350.degree. C. under superatmospheric pressure to give an aqueous solution or suspension which contains monomeric caprolactam and oligomers thereof and may contain polycaprolactam and subsequent isolation of monomeric caprolactam from the aqueous solution or suspension by distillation or extraction, by a process in which the hydrolyric cleavage is carried out in the presence of an alkali metal hydroxide at a pH of from 5 to 10.

Abstract translation: 己内酰胺通过在超大气压下在200-350℃下用5至50重量份的重量比的聚己内酰胺水解裂解聚己内酰胺从聚己内酰胺中回收，得到含有单体己内酰胺和 其低聚物并且可以含有聚己内酰胺并随后通过蒸馏或萃取从水溶液或悬浮液中分离单体己内酰胺，其中水解裂解在pH为5至10的碱金属氢氧化物存在下进行 。

公开(公告)号：US5294707A

公开(公告)日：1994-03-15

申请号：US23030

申请日：1993-02-25

Applicant: Richard Kotek

Inventor： Richard Kotek

IPC: C08J11/14 ,  C07D201/12

CPC classification number: C07D201/12

Abstract: Polyamide is semi-continuously depolymerized by: (a) charging the polyamide to a depolymerization reactor containing 5 to 50% by weight of an unpolymerized catalyst; (b) melting the polyamide and subjecting the resultant melt to a flow of superheated steam to obtain a steam distillate; (c) separating amide monomers in the distillate from other volatiles therein; (d) when conversion to amide monomers is 40 to 90% complete, recharging polyamide to the depolymerization reactor; and (e) repeating steps (a)-(d) until a desired amount of polyamide is depolymerized.

Abstract translation: 聚酰胺通过以下方法半连续解聚：（a）将聚酰胺装入含有5至50重量％未聚合催化剂的解聚反应器; （b）熔化聚酰胺并使所得熔体经过过热蒸汽流，得到蒸汽馏出物; （c）将馏出物中的酰胺单体与其中的其它挥发物分离; （d）当酰胺单体的转化为40-90％完成时，将聚酰胺再填充到解聚反应器中; 和（e）重复步骤（a） - （d），直到所需量的聚酰胺解聚。

公开(公告)号：USRE33073E

公开(公告)日：1989-09-26

申请号：US171414

申请日：1988-03-21

Applicant: Hugo Fuchs ,  Uwe Brand ,  Helmut Buchaeckert

Inventor： Hugo Fuchs ,  Uwe Brand ,  Helmut Buchaeckert

IPC: C07D201/12

CPC classification number: C07D201/12

Abstract: Caprolactam is obtained by cleaving oligomers of caprolactam by a process in which the oligomers, in a liquid or solid state, are introduced into a fluidized alumina bed and cleaved at from 290.degree. to 400.degree. C. in the presence of steam, and, in addition to the amount of inert gas required to fluidize the alumina bed, from 0.1 to 3 times this amount of inert gas is introduced above the fluidized bed.