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.

公开(公告)号：US4605762A

公开(公告)日：1986-08-12

申请号：US563812

申请日：1983-12-21

Applicant: Jorge W. Mandoki

Inventor： Jorge W. Mandoki

IPC: C07C27/02 ,  C07C51/09 ,  C07D201/12 ,  C07C51/487 ,  C07C85/26 ,  C07D487/00

CPC classification number: C08J11/14 ,  C07C51/09 ,  C07D201/12 ,  C08J2367/02 ,  Y02W30/704

Abstract: A process for the neutral hydrolytic depolymerization of condensation polymers is described. The process is conducted in a continuous manner and comprises introducing condensation polymer waste material into an aqueous hydrolysis zone at a temperature of between 200.degree. C. and 300.degree. C. and superatmospheric pressure of at least 15 atmospheres. High pressure steam is introduced into the lower portion of the hydrolysis zone underneath the level of the condensation polymer waste material. The steam serves as the principal source of heat for the hydrolysis zone. By being introduced underneath the level of the condensation polymer waste material, the steam agitates the waste material to provide heat transfer to accelerate the hydrolysis reaction. Further, a portion of the steam condenses to provide water which is a reactant in the hydrolysis reaction. An aqueous solution of the product(s) of the hydrolysis reaction is withdrawn from an upper portion of the hydrolysis zone.

Abstract translation: 描述了缩合聚合物的中性水解解聚的方法。 该方法以连续的方式进行，并且包括在200℃至300℃的温度和至少15个大气压的超大气压下将缩合聚合物废料引入水性水解区。 将高压蒸汽引入到缩合聚合物废料的水平面下方的水解区的下部。 蒸汽作为水解区的主要热源。 通过在冷凝聚合物废料的水平下引入，蒸汽搅动废料以提供热传递以加速水解反应。 此外，一部分蒸汽冷凝以提供作为水解反应中的反应物的水。 水解反应产物的水溶液从水解区的上部排出。

公开(公告)号：US4360461A

公开(公告)日：1982-11-23

申请号：US287696

申请日：1981-07-28

Applicant: Hugo Fuchs ,  Elmar Frommer ,  Otto-Alfred Grosskinsky

Inventor： Hugo Fuchs ,  Elmar Frommer ,  Otto-Alfred Grosskinsky

IPC: C07D201/12 ,  C08J11/02

CPC classification number: C08J11/02 ,  C07D201/12 ,  C08J2377/02

Abstract: In a process for obtaining caprolactam by cleaving caprolactam oligomers by passing them through an alumina catalyst bed at an elevated temperature, the improvement that the oligomers are introduced, as liquid or solid, into a fluidized bed of alumina and are cleaved at from 290.degree. to 400.degree. C. in the presence of steam.

Abstract translation: 在通过使己内酰胺低聚物通过在高温下通过氧化铝催化剂床而获得己内酰胺的方法中，将低聚物作为液体或固体引入到氧化铝的流化床中并且在290°至 400℃，在蒸汽存在下。

公开(公告)号：US4264501A

公开(公告)日：1981-04-28

申请号：US902884

申请日：1978-05-04

Applicant: Edmond H. J. P. Bour ,  Sijbrandus E. Schaafsma ,  Jean M. M. Warnier

Inventor： Edmond H. J. P. Bour ,  Sijbrandus E. Schaafsma ,  Jean M. M. Warnier

IPC: C07D207/263 ,  C07D201/12 ,  B01D3/38 ,  C07D207/12

CPC classification number: C07D201/12

Abstract: A process is described for the recovery of 2-pyrrolidone monomer from polypyrrolidone waste material by heating the latter in the presence of a small amount of strong acid, and distilling off the said monomer.

Abstract translation: 描述了一种从聚吡咯烷酮废料中回收2-吡咯烷酮单体的方法，通过在少量强酸的存在下加热2-吡咯烷酮单体并蒸馏出所述单体。

公开(公告)号：US4107160A

公开(公告)日：1978-08-15

申请号：US827370

申请日：1977-08-24

Applicant: Ovidiu Dicoi ,  Erwin Doerr

Inventor： Ovidiu Dicoi ,  Erwin Doerr

IPC: C07D201/12 ,  C07D201/16

CPC classification number: C07D201/16 ,  C07D201/12

Abstract: A process for the continuous recovery of caprolactam from either solid polycaprolactam waste by depolymerization or from liquid polycaprolactam extraction water from an extraction zone where, in either instance, a caprolactam water vapor mixture is produced and subsequently upgraded in a distillation zone to provide a dilute mixture of caprolactam and water vapor. A minor portion of this dilute caprolactam water vapor is condensed and recycled to the distillation zone. The remaining, major portion of this mixture is compressed and admixed with fresh steam, superheated and passed to either the extraction zone or depolymerization reaction.

Abstract translation: 从固体聚己内酰胺废物通过解聚连续回收己内酰胺或从液体聚己内酰胺萃取水中从萃取区连续回收己内酰胺的方法，其中在任何一种情况下产生己内酰胺水蒸气混合物，随后在蒸馏区中升级以提供稀释混合物 的己内酰胺和水蒸汽。 该稀少己内酰胺水蒸气的一小部分被冷凝并再循环到蒸馏区。 将该混合物的剩余部分压缩并与新鲜蒸汽混合，过热并通过萃取区或解聚反应。