公开(公告)号：US06495682B2

公开(公告)日：2002-12-17

申请号：US09934679

申请日：2001-08-23

Applicant: Peter W. H. Cheng ,  Jan A. J. Hendrix ,  Leonardus J. G. Raets

Inventor： Peter W. H. Cheng ,  Jan A. J. Hendrix ,  Leonardus J. G. Raets

IPC: C07D20116

CPC classification number: C07D201/12 ,  C07D201/16

Abstract: The present invention relates to a process for purifying an impure stream of caprolactam while recovering not only pure caprolactam but also medium-to-high pressure steam. Preferably, the stream of impure or crude caprolactam, which comprises at a minimum a substantial portion of water, is obtained from depolymerization of a polyamide-containing composition. The resulting purified caprolactam will have a purity greater than 90 weight percent and the recovered steam will have a temperature sufficiently high to provide a driving force for use with other equipment, for instance, heat exchange equipment.

Abstract translation: 本发明涉及纯化己内酰胺不纯物流的方法，同时不仅回收纯己内酰胺，而且回收中至高压蒸汽。 优选地，含有至少大部分水的不纯或粗己内酰胺流是由含聚酰胺的组合物的解聚获得的。 得到的纯化的己内酰胺将具有大于90重量％的纯度，并且所回收的蒸汽将具有足够高的温度以提供与其它设备（例如热交换设备）一起使用的驱动力。

公开(公告)号：US20010001792A1

公开(公告)日：2001-05-24

申请号：US09759444

申请日：2001-01-12

Applicant: AlliedSignal

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

IPC: C08J011/14 ,  C08G069/14 ,  C08G069/16

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 250null C. to about 400null 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汽流的温度下的饱和蒸汽压。 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：US06187917B1

公开(公告)日：2001-02-13

申请号：US09429269

申请日：1999-10-29

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

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

IPC: C07D20116

CPC classification number: C07D201/12

Abstract: The present invention provides a process for the preparation of purified caprolactam comprising the steps of: (a) depolymerizing polyamide-containing carpet in the presence of steam to obtain crude caprolactam and steam; (b) condensing or distilling said crude caprolactam and steam to form aqueous crude caprolactam comprising at least ten percent by weight water; (c) removing substantially all floating oil from the aqueous crude caprolactam so as to form a substantially floating oil-free aqueous crude caprolactam; (d) removing substantially all of said water from said substantially floating oil-free aqueous crude caprolactam; (e) distilling the resulting concentrated crude caprolactam at a pressure of less than about 8 mmHg and a temperature from about 110° C. to about 145° C. so as to form overheads and bottoms of the caprolactam; and (f) crystallizing the caprolactam overheads to obtain caprolactam crystals and mother liquor. The resulting purified caprolactam may then be used to make polycaprolactam which may then be used in engineered materials or spun into fiber.

Abstract translation: 本发明提供了制备纯己内酰胺的方法，包括以下步骤：（a）在蒸汽存在下解聚含聚酰胺的地毯以得到粗己内酰胺和蒸汽;（b）冷凝或蒸馏所述粗己内酰胺和蒸汽以形成 含有至少10重量％水的粗制己内酰胺水溶液;（c）从粗制己内酰胺水溶液中基本上除去所有漂浮的油，以便形成基本上漂浮的无油的含水的己内酰胺基质;（d）基本上将所有的所述水从所述 基本上漂浮的无油水性粗己内酰胺水溶液;（e）在小于约8mmHg的压力和约110℃至约145℃的温度下蒸馏所得浓缩的粗己内酰胺，以形成塔顶馏出物和塔底物 己内酰胺; 和（f）结晶己内酰胺塔顶馏出物以获得己内酰胺晶体和母液。所得到的纯化的己内酰胺然后可用于制备聚己内酰胺，然后可将其用于工程材料或纺成纤维。

公开(公告)号：US6011153A

公开(公告)日：2000-01-04

申请号：US140896

申请日：1998-08-21

Applicant: Wim Buijs ,  Henricus F. W. Wolters

Inventor： Wim Buijs ,  Henricus F. W. Wolters

IPC: C07D201/12 ,  C07D201/02 ,  C07D201/08

CPC classification number: C07D201/12

Abstract: Process for the preparation of a mixture of .epsilon.-caprolactam, 6-aminocaproic acid and 6-aminocaproic amide by heating an aqueous mixture containing ammonia and oligomers of 6-aminocaproic acid and/or of 6-aminocaproic amide, the aqueous mixture containing 0.5-7 wt. % of equivalent ammonia (calculated as NH.sub.3) and the temperature lying between 280.degree. C. and 330.degree. C., in which by "equivalent ammonia" is meant free ammonia and ammonia present in the form of a terminal amide group of one of the compounds present in the aqueous mixture.

Abstract translation: 通过加热含有氨和6-氨基己酸和/或6-氨基己酸酰胺的低聚物的含水混合物制备ε-己内酰胺，6-氨基己酸和6-氨基己酰胺的混合物的方法，含0.5- 7重量％ 相当于氨的百分比（以NH 3计算）和温度在280℃至330℃之间，其中“等效氨”是指游离氨和氨以其中之一的末端酰胺基团的形式存在 存在于含水混合物中的化合物。

公开(公告)号：US5948908A

公开(公告)日：1999-09-07

申请号：US617448

申请日：1996-03-18

Applicant: Stylianos Sifniades ,  Alan Bart Levy

Inventor： Stylianos Sifniades ,  Alan Bart Levy

IPC: C07D201/12 ,  C07D201/16

CPC classification number: C07D201/16 ,  C07D201/12

Abstract: The present invention provides an improved process for the recovery of caprolactam from polycaprolactam processing waste. The present process for depolymerizing polycaprolactam waste to form caprolactam comprises the step of: in the absence of added catalyst, contacting the polycaprolactam waste 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 1.5 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.

Abstract translation: 本发明提供了从聚己内酰胺处理废物中回收己内酰胺的改进方法。 用于解聚聚己内酰胺废物形成己内酰胺的本发明方法包括以下步骤：在不加入催化剂的情况下，在约250℃至约400℃的温度和 范围为约1.5atm至约100atm，并且在其中形成含己内酰胺的蒸汽流的温度下，基本上小于饱和的水蒸气压。

公开(公告)号：US5929234A

公开(公告)日：1999-07-27

申请号：US82842

申请日：1998-05-21

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：US5693793A

公开(公告)日：1997-12-02

申请号：US707476

申请日：1996-09-05

Applicant: Josef Ritz ,  Eberhard Fuchs ,  Guido Voit ,  Gunther Achhammer ,  Rolf Fischer

Inventor： Josef Ritz ,  Eberhard Fuchs ,  Guido Voit ,  Gunther Achhammer ,  Rolf Fischer

IPC: C07C231/06 ,  C07C237/06 ,  C07C253/00 ,  C07C255/24 ,  C07D201/08 ,  C07D201/12 ,  C07D201/16

CPC classification number: C07D201/12 ,  C07D201/08

Abstract: A process for preparing caprolactam by cyclization of 6-aminocapronitrile in the presence of water at elevated temperature and in the presence or absence of a catalyst and a solvent, comprises a) removing from the cyclization reaction effluent ("reaction effluent I") caprolactam and all components boiling higher than caprolactam ("high boilers"), b) treating the high boilers of stage a) with phosphoric acid and/or polyphosphoric acid at from 200 to 350.degree. C. to obtain a reaction effluent II, and c) removing caprolactam formed and any 6-aminocapronitrile from reaction effluent II of stage b) to obtain separation from unconverted high boilers and acid used.

Abstract translation: 在高温存在下和在存在或不存在催化剂和溶剂的情况下，通过6-氨基己腈的环化制备己内酰胺的方法包括：a）从环化反应流出物（“反应流出物I”）中除去己内酰胺和 所有组分沸点高于己内酰胺（“高锅炉”），b）用磷酸和/或多磷酸在200至350℃下处理阶段a）的高锅炉以获得反应流出物II，和c）除去 己内酰胺和来自阶段b）的反应流出物II的任何6-氨基己腈得到与未转化的高锅炉和酸的分离。

公开(公告)号：US5681952A

公开(公告)日：1997-10-28

申请号：US569640

申请日：1995-12-08

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℃，在约1大气压至约100大气压的范围内的压力，并且在其中形成含己内酰胺的蒸汽流的温度下，基本上小于饱和的水蒸气压。 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：US5556890A

公开(公告)日：1996-09-17

申请号：US253010

申请日：1994-06-02

Applicant: Antoon H. T. Halderit ,  Martin Booij ,  Jan A. J. Hendrix ,  Yvonne H. Frentzen

Inventor： Antoon H. T. Halderit ,  Martin Booij ,  Jan A. J. Hendrix ,  Yvonne H. Frentzen

IPC: C07D201/12 ,  C07D201/16 ,  C08J11/14

CPC classification number: C07D201/12 ,  C07D201/16

Abstract: The present invention is for a method of preparing purified .epsilon.-caprolactam from carpet waste containing nylon-6. Contaminated .epsilon.-caprolactam is obtained by depolymerizing nylon-6 from carpet waste. A mixture of the contaminated .epsilon.-caprolactam and water is then hydrogenated in the presence of hydrogen and a hydrogenation catalyst in order to produce purified .epsilon.-caprolactam. The amount of contaminated .epsilon.-caprolactam in the mixture can be between 10 and 95% by weight.

Abstract translation: 本发明涉及从含有尼龙-6的地毯废物中制备纯化的ε-己内酰胺的方法。 通过从地毯废物中解聚尼龙-6得到受污染的ε-己内酰胺。 然后将污染的ε-己内酰胺和水的混合物在氢气和氢化催化剂的存在下氢化，以产生纯化的ε-己内酰胺。 混合物中受污染的ε-己内酰胺的量可以在10至95重量％之间。

公开(公告)号：US5266694A

公开(公告)日：1993-11-30

申请号：US963224

申请日：1992-10-19

Applicant: Edward F. Moran, Jr.

Inventor： Edward F. Moran, Jr.

IPC: C07C209/62 ,  C07C211/12 ,  C07D201/12 ,  C07C201/12

CPC classification number: C07D201/12 ,  C07C209/62

Abstract: A process is disclosed for simultaneously depolymerizing nylon 6 and nylon 6,6 and reclaiming the monomer values by steam distillation.

Abstract translation: 公开了同时解聚尼龙6和尼龙6,6并通过蒸汽蒸馏回收单体值的方法。