公开(公告)号：US20050056532A1

公开(公告)日：2005-03-17

申请号：US10897472

申请日：2004-07-23

Applicant: Rudolf Kampf ,  Reinhard Wolf ,  Joachim Seelig

Inventor： Rudolf Kampf ,  Reinhard Wolf ,  Joachim Seelig

IPC: C07D201/12 ,  C07D201/16

CPC classification number: C07D201/16 ,  C07D201/12

Abstract: The invention relates to a method for the continuous production of caprolactam from waste containing polyamide, comprising a) depolymerisation of the waste containing polyamide, whereby a caprolactam raw material and, where applicable, a flow containing secondary constituents or additives is obtained, and b) irradiation of the caprolactam raw material with UV radiation.

Abstract translation: 本发明涉及一种从含有聚酰胺的废物中连续生产己内酰胺的方法，其包括：a）含有聚酰胺的废物的解聚，由此得到己内酰胺原料，并且在适用的情况下获得含有二级成分或添加剂的流动，以及b） 紫外线照射己内酰胺原料。

公开(公告)号：US06849731B2

公开(公告)日：2005-02-01

申请号：US10468263

申请日：2002-02-27

Applicant: Maria Louisa Christina Dsinter-De Hondt ,  Joannes Albertus Wilhelmus Lemmens

Inventor： Maria Louisa Christina Dsinter-De Hondt ,  Joannes Albertus Wilhelmus Lemmens

IPC: C07D201/16

CPC classification number: C07D201/16

Abstract: Process for recovering caprolactam from a solution comprising caprolactam dissolved in an organic solvent, said process comprising: a) washing the solution with water or an aqueous alkaline solution, resulting in a washed solution comprising caprolactam and organic solvent and in a washing residue, b) evaporating organic solvent from the washed solution, resulting in caprolactam product, c) optionally, hydrogenating the caprolactam product, d) optionally, evaporating water from the caprolactam product, e) distilling the caprolactam product to recover caprolactam and a distillation residue, f) extracting the distillation residue with an organic solvent in the presence of water to obtain (i) an extract comprising caprolactam dissolved in organic solvent and (ii) an aqueous effluent, and g) recycling the extract to step a) or b).

Abstract translation: 从包含溶解在有机溶剂中的己内酰胺的溶液中回收己内酰胺的方法，所述方法包括：a）用水或碱性水溶液洗涤溶液，得到包含己内酰胺和有机溶剂的洗涤溶液，并在洗涤残渣中，b） 从洗涤的溶液中蒸发有机溶剂，得到己内酰胺产物，c）任选地使己内酰胺产物氢化，d）任选地从己内酰胺产物蒸发水，e）蒸馏己内酰胺产物以回收己内酰胺和蒸馏残渣，f） 在水的存在下用有机溶剂蒸馏残余物，得到（i）包含溶解在有机溶剂中的己内酰胺的提取物和（ii）含水流出物，和g）将提取物再循环到步骤a）或b）。

公开(公告)号：US20030023083A1

公开(公告)日：2003-01-30

申请号：US10204966

申请日：2002-08-27

Inventor： Hermann Luyken ,  Frank Ohlbach

IPC: B01D001/00 ,  C07D201/16

CPC classification number: C07C209/86 ,  C07C253/34 ,  C07D223/04 ,  C07D223/12 ,  Y10S203/90

Abstract: The invention relates to a method for separating by distillation a portion or the entirety of an azeptine derivative (III), which is selected from the group consisting of aminohexylidene imine, tetrahydroazepine, hexylhexahydroazepine and of aminohexylhexahydroazepine, out of a mixture (II) containing an azepine derivative (III) and an amine (I). The inventive method is characterized in that the distillation is carried out with a maximum bottom temperature of 150null C.

Abstract translation: 本发明涉及一种通过蒸馏法从含有氨基亚氨基亚胺，四氢氮杂，己基六氢吖庚因和氨基己基六氢吖庚因的一种或多种氮杂基衍生物（III）的混合物（II）中分离出来的方法， 吖庚因衍生物（III）和胺（I）。 本发明的方法的特征在于在150℃的最高底部温度下进行蒸馏。

公开(公告)号：US5990306A

公开(公告)日：1999-11-23

申请号：US922853

申请日：1997-09-03

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

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

IPC: C07D201/12 ,  C07D201/16

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) removing substantially all of said water from said crude caprolactam and steam(c) distilling the resulting concentrated crude caprolactam at a pressure of less than about 8 mmHg and a temperature from about 110.degree. C. to about 145.degree. C. so as to form overheads and bottoms of the caprolactam; and(d) 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获得粗己内酰胺和蒸汽; （b）从所述粗己内酰胺和蒸汽中去除基本上所有的所述水;（c）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，以便 以形成己内酰胺的塔顶馏出物和塔底物; 和（d）结晶己内酰胺塔顶馏出物以获得己内酰胺晶体和母液。 然后将所得纯化的己内酰胺用于制备聚己内酰胺，然后将其用于工程化材料或纺成纤维。

公开(公告)号：US5441607A

公开(公告)日：1995-08-15

申请号：US265740

申请日：1994-06-27

Applicant: Hugo Fuchs ,  Josef Ritz ,  Hans J. Wilfinger ,  David Weatherford

Inventor： Hugo Fuchs ,  Josef Ritz ,  Hans J. Wilfinger ,  David Weatherford

IPC: C07D201/12 ,  C07D201/16 ,  B01D3/34

CPC classification number: C07D201/12 ,  C07D201/16

Abstract: Recovery of caprolactam and of an alkali metal carbonate from distillation residues which are obtained in the purification of caprolactam and contain caprolactam and/or oligomers and/or polymers of caprolactam and also alkali metal hydroxides by(a) melting the distillation residues, the caprolactam and/or oligomers and/or polymers of caprolactam and alkali metal hydroxides,(b) continuously removing caprolactam from the melt,(c) after removing caprolactam, cooling the melt and obtaining a residue,(d) dissolving the residue thus obtained in water and(e) subjecting the aqueous solution thus obtained to combustion with the formation of an alkali metal carbonateis described.

Abstract translation: 从纯化己内酰胺获得的己内酰胺和碱金属碳酸盐回收己内酰胺和/或己内酰胺和/或己内酰胺的聚合物和/或碱金属氢氧化物的齐聚物和/或碱金属氢氧化物，通过（a）将蒸馏残余物，己内酰胺和 /或己内酰胺和碱金属氢氧化物的低聚物和/或聚合物，（b）从熔体中连续除去己内酰胺，（c）除去己内酰胺后，冷却熔体并获得残余物，（d）将由此获得的残余物溶于水和 （e）描述了所得到的水溶液在形成碱金属碳酸盐时的燃烧。

公开(公告)号：US5350847A

公开(公告)日：1994-09-27

申请号：US113081

申请日：1993-08-30

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

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

IPC: C07B63/02 ,  C07D201/16 ,  C07D201/12

CPC classification number: C07D201/16

Abstract: Caprolactam is purified by oxidative treatment in which mixtures which essentially contain the caprolactam to be purified and unsaturated lactams are treated with oxygen or an oxygen-containing gas mixture in an alkaline medium.

Abstract translation: 己内酰胺通过氧化处理纯化，其中基本上含有待纯化的己内酰胺和不饱和内酰胺的混合物在碱性介质中用氧或含氧气体混合物处理。

公开(公告)号：US4900821A

公开(公告)日：1990-02-13

申请号：US330695

申请日：1989-03-30

Applicant: Kazuo Tan ,  Takashi Hironaka ,  Michio Nakamura

Inventor： Kazuo Tan ,  Takashi Hironaka ,  Michio Nakamura

IPC: C07D201/16

CPC classification number: C07D201/16

Abstract: A method for producing high-purity caprolactam from a mixture comprising a melt of crude caprolactam and water, which comprises cooling the mixture in a crystallizer under a reduced pressure of from 1 to 22 Torr while maintaining the water concentration in the mixture at a level of from 0.5 to 10% by weight, to crystallize high-purity caprolactam, and then separating the resulting crystals.

公开(公告)号：US4882430A

公开(公告)日：1989-11-21

申请号：US257274

申请日：1988-10-13

Applicant: Gerald Neubauer ,  Emile De Decker ,  Hugo Fuchs ,  Bernhard Holzknecht ,  Josef Ritz

Inventor： Gerald Neubauer ,  Emile De Decker ,  Hugo Fuchs ,  Bernhard Holzknecht ,  Josef Ritz

IPC: C07D201/16

CPC classification number: C07D201/16

Abstract: Caprolactam is recovered from caprolactam distillation low boilers or high boilers or mixtures thereof by the following steps:(a) crystallizing a low or high boiler or a mixture thereof to form purified capro-lactam crystals and a mother liquor,(b) separating off the purified caprolactam crystals to leave a mother liquor,(c) recycling from 5 to 90% by weight of the mother liquor of stage (b) into stage (a) and transferring the remainder of the mother liquor into the subsequent stage (d),(d) crystallizing the remaining mother liquor portion from stage (c) to form caprolactam crystals and a mother liquor, separating off the caprolactam crystals of stage(e) (d) and recycling the same into stage (a) to leave a mother liquor,(f) recycling from 20 to 99% by weight of mother liquor of stage (e) into stage (d) and channeling out the remainder of the impurity-containing mother liquor of stage (e).

Abstract translation: 通过以下步骤从己内酰胺蒸馏低锅炉或高锅炉或其混合物回收己内酰胺：（a）使低或高锅炉或其混合物结晶以形成纯化的己内酰胺结晶和母液，（b）将 纯化的己内酰胺晶体离开母液，（c）将阶段（b）的母液的5至90重量％循环到阶段（a）中，并将剩余的母液转移到后续阶段（d）中， （d）从阶段（c）中将剩余的母液部分结晶以形成己内酰胺晶体和母液，分离阶段（e）（d）的己内酰胺晶体并将其再循环到阶段（a）中以留下母液 ，（f）将阶段（e）的母液的20至99重量％循环到阶段（d）中，并且引出阶段（e）的含杂质母液的剩余部分。

公开(公告)号：US4767503A

公开(公告)日：1988-08-30

申请号：US527044

申请日：1983-08-29

Applicant: Lamberto Crescentini ,  Joseph D. DeCaprio ,  William B. Fisher ,  Roy J. Lilley, Jr.

Inventor： Lamberto Crescentini ,  Joseph D. DeCaprio ,  William B. Fisher ,  Roy J. Lilley, Jr.

IPC: C07D201/16 ,  B01D3/14 ,  B01D3/38

CPC classification number: C07D201/16

Abstract: This invention is a method of purifying crude caprolactam. The improved method comprises taking a portion of a process stream of crude caprolactam having low boiling impurities and distilling the stream in the presence of water by fractional distillation into an overhead containing water and low boiling impurities and bottoms of caprolactam having improved purity and low water content.The improvement also comprises taking a low water content stream of crude caprolactam having low boiling impurities and adding water to the stream and distilling the stream by fractional distillation as described above.

Abstract translation: 本发明是纯化己内酰胺的方法。 改进的方法包括取一部分具有低沸点杂质的粗己内酰胺的工艺流，并在水存在下通过分馏将该物流蒸馏到含有水和低沸点杂质的塔顶馏出物中，并且具有改善的纯度和低含水量的己内酰胺底部 。 改进之处还在于将低沸点杂质的低水含量的己内酰胺水含量低，并向水中加入水并通过如上所述的分馏蒸馏。

公开(公告)号：US4764607A

公开(公告)日：1988-08-16

申请号：US945117

申请日：1986-12-22

Applicant: Laszlo J. Balint ,  Julius Greenburg

Inventor： Laszlo J. Balint ,  Julius Greenburg

IPC: C07D201/16

CPC classification number: C07D201/16

Abstract: Method and improved apparatus for recovering a volatile organic material, such as caprolactam, from a liquid mixture of organic and inorganic materials are disclosed. The method features the step of mixing the liquid mixture with superheated steam for 0.005 to 1.0 second to vaporize a large portion of the volatile organic material without degrading the organic materials. The steam and vaporized organic materials are then separated from the liquid mixture remaining, followed by separation of the vaporized organic material from the steam. The vaporized organic material subsequently is condensed. The improved apparatus features means for introducing superheated steam into a vaporizer feed pipe, as well as means for mixing the superheated steam with the liquid mixture in the pipe for 0.005 to 1.0 second so that a large portion of the volatile organic material is vaporized and feeds with the steam and remaining liquid mixture into the vaporizer for separation.

Abstract translation: 公开了用于从有机和无机材料的液体混合物中回收挥发性有机材料如己内酰胺的方法和改进的装置。 该方法的特征在于将液体混合物与过热蒸汽混合0.005至1.0秒以蒸发大部分挥发性有机材料而不降解有机材料。 然后将蒸汽和蒸发的有机材料与剩余的液体混合物分离，然后将蒸发的有机材料与蒸汽分离。 蒸发的有机材料随后被冷凝。 改进的装置具有用于将过热蒸汽引入蒸发器进料管的装置，以及用于将过热蒸汽与管中的液体混合物混合0.005至1.0秒的装置，使得大部分挥发性有机材料蒸发并进料 蒸汽和剩余的液体混合物进入蒸发器进行分离。