公开(公告)号：US20030132098A1

公开(公告)日：2003-07-17

申请号：US10297051

申请日：2002-12-02

Inventor： Hermann Luyken ,  Frank Ohlbach ,  Stefan Maixner ,  Rolf-Hartmuth Fischer ,  Johann-Peter Melder ,  Peter Bassler ,  Andreas Ansmann

IPC: B01D003/00 ,  C01C001/10 ,  B01D005/00

CPC classification number: C01C1/10 ,  C07D201/08 ,  C07D201/16

Abstract: A process for distillative removal of ammonia from solutions (I) which include a lactam and ammonia comprises effecting said removal in a distillation apparatus (a) at an absolute pressure of less than 10 bar.

Abstract translation: 从包括内酰胺和氨的溶液（I）中蒸馏除去氨的方法包括在绝对压力小于10巴的蒸馏装置（a）中进行所述除去。

公开(公告)号：US20030004284A1

公开(公告)日：2003-01-02

申请号：US10152637

申请日：2002-05-23

Inventor： Arnd Bottcher ,  Rolf Pinkos ,  Rudolf Erich Lorenz ,  Heike Becker

IPC: C08F002/38

CPC classification number: C07D223/10 ,  C07D201/16

Abstract: A process for purifying N-vinyl-null-caprolactam comprises converting the N-vinyl-null-caprolactam which is to be purified and has a purity of at least 95% by weight into a melt, partially crystallizing the melt and separating the crystals from the mother liquor.

Abstract translation: 一种纯化N-乙烯基-ε-己内酰胺的方法包括将要纯化的纯度为至少95重量％的N-乙烯基-ε-己内酰胺转化成熔体，使熔体部分结晶并将晶体从 母酒。

公开(公告)号：US20020058808A1

公开(公告)日：2002-05-16

申请号：US09934679

申请日：2001-08-23

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

IPC: C07D223/10

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.

公开(公告)号：US20020005343A1

公开(公告)日：2002-01-17

申请号：US09226718

申请日：1999-01-07

Inventor： YVONNE FRENTZEN ,  NICOLAAS HAASEN ,  HENRICUS F.W. WOLTERS

IPC: B01D003/38 ,  C07D201/16

CPC classification number: C07D201/16

Abstract: The invention relates to a process for the separation of a ketoxime or aldoxime from a ketoxime- or aldoxime-containing amide mixture in which the ketoxime or aldoxime is separated from the amide mixture by means of distillation. This has proved to be a very simple and direct method for separating the ketoxime and/or aldoxime from the desired amide.

Abstract translation: 本发明涉及从含有酮肟或醛肟的酰胺混合物中分离酮肟或醛肟的方法，其中酮肟或醛肟通过蒸馏与酰胺混合物分离。 已证明这是一种非常简单和直接的方法，用于将酮肟和/或醛肟与所需酰胺分离。

公开(公告)号：US06323341B1

公开(公告)日：2001-11-27

申请号：US09665592

申请日：2000-09-19

Applicant: Frank P. W. Agterberg ,  Rudolf P. M. Guit ,  Nicolaas F. Haasen

Inventor： Frank P. W. Agterberg ,  Rudolf P. M. Guit ,  Nicolaas F. Haasen

IPC: C07D20116

CPC classification number: C07D201/08 ,  C07D201/16

Abstract: The invention relates to a process for the purification of crude &egr;-caprolactam, wherein crude &egr;-caprolactam prepared by cyclization of alkyl 6-aminocaproate, 6-aminocapronitrile, 6-aminocaproic acid, 6-aminocaproic amide and/or oligomers thereof, is subjected to a crystallization process.

Abstract translation: 本发明涉及纯化ε-己内酰胺的方法，其中将通过6-氨基己酸烷基酯，6-氨基己腈，6-氨基己酸，6-氨基己酰胺和/或其低聚物的环化制备的粗ε-己内酰胺进行 结晶过程。

公开(公告)号：US5869654A

公开(公告)日：1999-02-09

申请号：US844539

申请日：1997-04-18

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.The formed caprolactam may then be used in the production of engineered resins and fibers.

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。 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：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：US5459261A

公开(公告)日：1995-10-17

申请号：US289577

申请日：1994-08-15

Applicant: Yasuhiko Higashio ,  Hiroshi Kajikuri ,  Keisuke Sugita ,  Hideki Doi ,  Masanobu Matsubara

Inventor： Yasuhiko Higashio ,  Hiroshi Kajikuri ,  Keisuke Sugita ,  Hideki Doi ,  Masanobu Matsubara

IPC: C07D201/16 ,  C07D201/14

CPC classification number: C07D201/16

Abstract: A process for producing a high purity caprolactam is disclosed in which a crude caprolactam obtained by a catalytic rearrangement of cyclohexanone oxime is subjected(1) to mixing, while stirring, with at least one hydrocarbon selected from the group consisting of aliphatic hydrocarbons and alicyclic hydrocarbons to form a liquid-liquid, two-layer liquid mixture, and then crystallizing caprolactam out of the liquid mixture;(2) to mixing with both at least one hydrocarbon selected from the group consisting of aliphatic hydrocarbons and alicyclic hydrocarbons, and water to form a liquid mixture, separating the liquid mixture into a hydrocarbon layer and a water layer, and then recovering caprolactam from the water layer; or(3) to distillation in the co-presence of at least one aliphatic saturated hydrocarbon of 10 to 18 carbon atoms.

Abstract translation: 公开了一种制备高纯度己内酰胺的方法，其中通过环己酮肟的催化重排获得的粗己内酰胺在搅拌下与至少一种选自脂族烃和脂环族烃的烃进行混合 形成液 - 液两层液体混合物，然后从该液体混合物中结晶己内酰胺; （2）与选自脂族烃和脂环烃的至少一种烃和水混合以形成液体混合物，将液体混合物分离成烃层和水层，然后从其中回收己内酰胺 水层; 或（3）在至少一种10至18个碳原子的脂族饱和烃的共存下进行蒸馏。

公开(公告)号：US5362870A

公开(公告)日：1994-11-08

申请号：US46146

申请日：1993-04-15

Applicant: Yasuhiko Higashio ,  Hiroshi Kajikuri ,  Keisuke Sugita ,  Hideki Doi ,  Masanobu Matsubara

Inventor： Yasuhiko Higashio ,  Hiroshi Kajikuri ,  Keisuke Sugita ,  Hideki Doi ,  Masanobu Matsubara

IPC: C07D201/16

CPC classification number: C07D201/16

Abstract: A process for producing a high purity caprolactam is disclosed in which a crude caprolactam obtained by a catalytic rearrangement of cyclohexanone oxime is subjected(1) to mixing, while stirring, with at least one hydrocarbon selected from the group consisting of aliphatic hydrocarbons and alicyclic hydrocarbons to form a liquid-liquid, two-layer liquid mixture, and then crystallizing caprolactam out of the liquid mixture;(2) to mixing with both at least one hydrocarbon selected from the group consisting of aliphatic hydrocarbons and alicyclic hydrocarbons, and water to form a liquid mixture, separating the liquid mixture into a hydrocarbon layer and a water layer, and then recovering caprolactam from the water layer; or(3) to distillation in the co-presence of at least one aliphatic saturated hydrocarbon of 10 to 18 carbon atoms.

Abstract translation: 公开了一种制备高纯度己内酰胺的方法，其中通过环己酮肟的催化重排获得的粗己内酰胺在搅拌下与至少一种选自脂族烃和脂环族烃的烃进行混合 形成液 - 液两层液体混合物，然后从该液体混合物中结晶己内酰胺; （2）与选自脂族烃和脂环烃的至少一种烃和水混合以形成液体混合物，将液体混合物分离成烃层和水层，然后从其中回收己内酰胺 水层; 或（3）在至少一种10至18个碳原子的脂族饱和烃的共存下进行蒸馏。

公开(公告)号：US4795571A

公开(公告)日：1989-01-03

申请号：US154227

申请日：1988-02-10

Applicant: Bernhard Holzknecht ,  Hugo Fuchs ,  Eckhard Hetzel ,  Klaus Wintermantel ,  Peter Thoma

Inventor： Bernhard Holzknecht ,  Hugo Fuchs ,  Eckhard Hetzel ,  Klaus Wintermantel ,  Peter Thoma

IPC: B01D9/00 ,  B01D9/02 ,  B01D9/04 ,  C07B63/00 ,  C07C67/00 ,  C07C241/00 ,  C07C265/14 ,  C07D201/16

CPC classification number: C07D201/16 ,  B01D9/0013

Abstract: Frozen crystal layers are purified by a process in which these crystal layers, after they have been frozen out from a melt or solution on a cooling surface, are brought into contact with a purifying liquid and thus purified over their entire thickness, after which the said layers are separated from the purifying liquid and then melted, wherein the temperature of the crystal layers and of the purifying liquid is close to the melting point or solubility temperature, mass transfer at the phase boundary is intensified by forced convection, and this purification is carried out in the course of from 1 to 60 minutes on layers having a thickness of from 0.2 to 10 mm.

Abstract translation: 冷冻的晶体层通过这些方法纯化，其中这些晶体层在从冷却表面上的熔体或溶液中冷冻出来之后，与净化液体接触并由此在其整个厚度上净化，之后所述 将层与净化液分离，然后熔融，其中晶体层和净化液的温度接近熔点或溶解温度，通过强制对流加强相边界处的质量传递，并进行该纯化 在厚度为0.2至10mm的层上为1至60分钟的过程。