公开(公告)号：US07700767B2

公开(公告)日：2010-04-20

申请号：US11897883

申请日：2007-08-31

Applicant: Chien-Hsien Li ,  Shou-Li Luo

Inventor： Chien-Hsien Li ,  Shou-Li Luo

IPC: C07D223/04

CPC classification number: C07D223/10 ,  C07D201/16

Abstract: A system for purifying an aqueous solution of crude caprolactam is provided, which includes a filtration zone (A), an inspection unit (B), a purification zone (C), and a first temporary storage tank (D). The filtration zone (A) contains a filtration apparatus though which an aqueous solution of crude caprolactam is filtered to remove ionic impurities therein, so as to obtain caprolactam-containing filtrate; the inspection unit (B) is used for judging the filtrate from the filtration zone (A) meets the preset inspection standards; the purification zone (C) is used for concentrating and further purifying filtrate meeting the preset inspection standards, thereby forming a final caprolactam product; and the first temporary storage tank (D) is used for receiving the filtrate not meeting the preset inspection standards, which is then mixed with the aqueous solution of crude caprolactam and delivered back to the filtration zone (A).

Abstract translation: 提供了一种用于纯化粗己内酰胺水溶液的体系，其包括过滤区（A），检查单元（B），净化区（C）和第一临时储罐（D）。 过滤区（A）含有过滤装置，通过其过滤粗己内酰胺水溶液以除去其中的离子杂质，得到含己内酰胺的滤液; 检查单元（B）用于判断过滤区域（A）的滤液符合预设的检验标准; 净化区（C）用于浓缩并进一步净化满足预设检查标准的滤液，从而形成最终的己内酰胺产品; 并且第一临时储罐（D）用于接收不符合预设检查标准的滤液，然后将其与粗己内酰胺水溶液混合并输送回过滤区（A）。

公开(公告)号：US07365195B2

公开(公告)日：2008-04-29

申请号：US10565774

申请日：2004-07-16

Applicant: Joannes Albertus Wilhelmus J. A. W. Lemmens ,  Theodorus Maria T. M. Smeets ,  Paul Maria P. M. Brandts ,  Koen Harry Maria K. H. M. Ceyssens

Inventor： Joannes Albertus Wilhelmus J. A. W. Lemmens ,  Theodorus Maria T. M. Smeets ,  Paul Maria P. M. Brandts ,  Koen Harry Maria K. H. M. Ceyssens

IPC: C07D201/16

CPC classification number: C07D201/16

Abstract: The invention relates to a process for purifying caprolactam, said process comprising (a) subjecting the caprolactam to a hydrogenation by treating the caprolactam with hydrogen in the presence of a heterogeneous nickel containing hydrogenation catalyst, (b) distilling at least a portion of the hydrogenated caprolactam in a distillation column containing nickel in an amount sufficiently low such that ΔPANNi≦3, wherein ΔPANNi=ΔPAN−ΔPANNi=0, ΔPAN=increase of the PAN number of caprolactam during distilling, ΔPANNi=0 increase of the PAN number of caprolactam during distilling under the same conditions in a distillation column free of nickel. Nickel is removed from the caprolactam solution prior to the distillation step.

Abstract translation: 本发明涉及一种纯化己内酰胺的方法，所述方法包括（a）在非均相含镍氢化催化剂存在下，用氢处理己内酰胺进行氢化，（b）蒸馏至少一部分氢化 己内酰胺在含有足够低的量的镍的蒸馏塔中，使得ΔPANN 3 =ΔPAN-ΔPANNi = 0 ，DeltaPAN =蒸馏期间己内酰胺的PAN值的增加，在不含镍的蒸馏塔中在相同条件下蒸馏期间PAN己内酰胺的PAN数量的增加。 在蒸馏步骤之前，将镍从己内酰胺溶液中除去。

公开(公告)号：US20080071081A1

公开(公告)日：2008-03-20

申请号：US11632339

申请日：2005-07-12

Applicant: Eric Lacroix ,  Serge Hub ,  Philippe Bonnet ,  Michel Devic

Inventor： Eric Lacroix ,  Serge Hub ,  Philippe Bonnet ,  Michel Devic

IPC: C07D225/00

CPC classification number: C07D201/14 ,  C07D201/16

Abstract: The invention concerns a method for purifying cyclic lactams containing 6 to 12 carbon atoms and containing chlorolactams as impurities, by hydrogenation reaction in the presence of a metal catalyst, a solvent and a compound having a radical —NH2, —NH— or —N

Abstract translation: 本发明涉及一种在金属催化剂，溶剂和具有自由基-NH 2的化合物的存在下，通过氢化反应来纯化含有6至12个碳原子的环状内酰胺并含有氯内酰胺作为杂质的方法， ，-NH-或-NH-基团是在氢化反应期间产生的HCl捕获氨基的溶剂，有机溶剂是能够溶解通过氨基捕获HCl形成的胺化盐酸盐的溶剂; 以摩尔数表示的以百摩尔表示的以百摩尔表示的氯内酰胺形式的基本有机氯的百分比表示的摩尔比为至少0.5。

公开(公告)号：US20060281928A1

公开(公告)日：2006-12-14

申请号：US10554767

申请日：2004-05-19

Applicant: Hideto Sugiura ,  Hitoshi Yano

Inventor： Hideto Sugiura ,  Hitoshi Yano

IPC: C07D207/267

CPC classification number: C07D207/267 ,  C07D201/16

Abstract: A process for rectifying N-vinyl-2-pyrrolidone by crystallization is described. The process is characterized in that the crystallization is performed for a mother liquid having crude N-vinyl-2-pyrrolidone in the presence of a stabilizer. In the process for rectifying N-vinyl-2-pyrrolidone by crystallization, the yield of N-vinyl-2-pyrrolidone is improved.

Abstract translation: 描述了通过结晶对N-乙烯基-2-吡咯烷酮进行精馏的方法。 该方法的特征在于在稳定剂存在下对具有粗N-乙烯基-2-吡咯烷酮的母液进行结晶。 在通过结晶对N-乙烯基-2-吡咯烷酮进行精馏的方法中，提高了N-乙烯基-2-吡咯烷酮的收率。

公开(公告)号：US20060041122A1

公开(公告)日：2006-02-23

申请号：US10534802

申请日：2003-11-11

Applicant: Rolf-Hartmuth Fischer ,  Hermann Luyken ,  Andreas Ansmann ,  Peter Babler ,  Christoph Benisch ,  Stefan Maixner ,  Johann-Peter Melder

Inventor： Rolf-Hartmuth Fischer ,  Hermann Luyken ,  Andreas Ansmann ,  Peter Babler ,  Christoph Benisch ,  Stefan Maixner ,  Johann-Peter Melder

IPC: C07D201/16

CPC classification number: C07D201/16 ,  C07D201/08

Abstract: A process for removing high boilers from crude caprolactam which comprises high boilers, caprolactam and in some cases low boilers, and which has been obtained by a) reacting 6-aminocapronitrile with water to give a reaction mixture b) removing ammonia and unconverted water from the reaction mixture to obtain crude caprolactam, which comprises c) feeding the crude caprolactam to a distillation apparatus to obtain a first substream via the top as a product and a second substream via the bottom, by setting the pressure in the distillation in such a way that the bottom temperature does not go below 170° C., and adjusting the second substream in such a way that the caprolactam content of the second substream is not less than 10% by weight, based on the entire second substream.

Abstract translation: 一种从粗己内酰胺中除去高锅炉的方法，其包括高锅炉，己内酰胺，在某些情况下是低锅炉，并且通过以下方法获得：a）使6-氨基己腈与水反应得到反应混合物; b）除去氨和未转化的水 反应混合物以获得粗己内酰胺，其包括c）将粗己内酰胺加入到蒸馏装置中，通过顶部获得第一子流作为产物，通过底部通过设置第二子流，通过将蒸馏中的压力设定为使得 底部温度不低于170℃，并且调节第二子流，使得第二子流的己内酰胺含量基于整个第二子流不小于10重量％。

公开(公告)号：US20050029086A1

公开(公告)日：2005-02-10

申请号：US10487673

申请日：2002-08-23

Applicant: Louise Groot Zevert ,  Joseph Bindels ,  Rita Joosten ,  Joannes Lemmens ,  Eelco Mostert

Inventor： Louise Groot Zevert ,  Joseph Bindels ,  Rita Joosten ,  Joannes Lemmens ,  Eelco Mostert

IPC: C07D223/10 ,  C07D201/16 ,  C07D233/10 ,  B01D3/34 ,  C07D307/02

CPC classification number: C07D201/16 ,  C07D223/10

Abstract: The invention relates to a process for distilling alkaline caprolactam product at reduced pressure, said alkaline caprolactam product comprising (i) caprolactam, (ii) organic impurities, and (iii) one or more bases selected from the group consisting of alkali hydroxide and alkali amino caproate, characterized in that the alkalinity of the alkaline caprolactam product is less than 5 meq. per kg of caprolactam.

Abstract translation: 本发明涉及一种在减压下蒸馏碱性己内酰胺产物的方法，所述碱性己内酰胺产物包含（i）己内酰胺，（ii）有机杂质，和（iii）一种或多种选自碱金属氢氧化物和碱性氨基 己酸盐，其特征在于碱性己内酰胺产物的碱度小于5meq。 每公斤己内酰胺。

公开(公告)号：US06821339B2

公开(公告)日：2004-11-23

申请号：US10181280

申请日：2002-11-18

Applicant: Kristian Eriksson ,  Juha Nurmi ,  Jouko Virtanen

Inventor： Kristian Eriksson ,  Juha Nurmi ,  Jouko Virtanen

IPC: C30B714

CPC classification number: C13B30/027 ,  C07B63/00 ,  C07D201/16 ,  C30B7/00

Abstract: The invention relates to a process for the crystallization of substances having a narrow metastable supersaturation zone. In the process the saturation of a solution is gradually increased and the solution is seeded for the crystallization. The seeding is performed at a seeding point which is selected in response to a signal received from said process indicating imminent or initial spontaneous nucleation. The process provides a good crystal yield and a crystalline product having a uniform crystal structure and a narrow crystal size distribution.

Abstract translation: 本发明涉及一种具有窄亚稳态过饱和区物质结晶的方法。 在该过程中，溶液的饱和度逐渐增加，并将溶液接种以进行结晶。 在接种点进行播种，该播种点响应于从所述过程接收到的信号而选择，表明即将发生或初始自发成核。 该方法提供了良好的晶体收率和具有均匀晶体结构和窄晶体尺寸分布的晶体产物。

公开(公告)号：US06683178B2

公开(公告)日：2004-01-27

申请号：US10257877

申请日：2002-10-17

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

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

IPC: C07D20108

CPC classification number: C07D201/08 ,  C07D201/16

Abstract: The invention relates to a method for producing cyclic lactams of formula (II) by reacting a compound (I) of formula (I) with water in the presence of an organic, liquid dilution agent in the liquid phase. In formula (II), n and m respectively can have the values 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9 and the sum of n+m is at least 3, preferably at least 4 and R1 and R2 represent C1-C6 alkyl, C5-C7 cycloalkyl or C6-C12 aryl groups. In formula (I), R1, R2, m and n are defined as above and R represents nitrile, carboxylic acid amide and carboxylic acid groups. The inventive method is characterized in that a) compound (I) is reacted with water in the liquid phase in the presence of an organic, liquid dilution agent (III) to form a mixture (IV) containing a lactam (II) and said mixture (IV) is subjected to an aqueous treatment to obtain a two-phase system.

Abstract translation: 本发明涉及在液相中有机液体稀释剂存在下使式（I）化合物（I）与水反应制备式（II）的环状内酰胺的方法。 在式（II）中，n和m分别具有0,1,2,3,4,5,6,7,8和9的值，并且n + m的和至少为3，优选至少为4，并且 R 1和R 2代表C 1 -C 6烷基，C 5 -C 7环烷基或C 6 -C 12芳基。 在式（I）中，R 1，R 2，m和n如上定义，R代表腈，羧酸酰胺和羧酸基团。 本发明的方法的特征在于：a）化合物（I）在液相中在有机液体稀释剂（III）的存在下与水反应，形成含有内酰胺（II）的混合物（IV），所述混合物 （IV）进行水处理以获得两相体系。

公开(公告)号：US06579979B2

公开(公告)日：2003-06-17

申请号：US09860437

申请日：2001-05-21

Applicant: Philippe Leconte

Inventor： Philippe Leconte

IPC: C07D20116

CPC classification number: C07D201/08 ,  C07D201/16

Abstract: Lactam liquid media of reaction which comprise at least one lactam final product, notably &egr;-caprolactam, are treated and purified to convert impurities contained therein into harmless species or species easily removed downstream, by hydrogenating such liquid media of reaction in the presence of a hydrogenation catalyst and during which hydrogenation the liquid media of reaction have effective lactam-purifying amounts of ammonia dissolved therein.

公开(公告)号：US20020030014A1

公开(公告)日：2002-03-14

申请号：US09860437

申请日：2001-05-21

Inventor： Philippe Leconte

IPC: C02F001/26

CPC classification number: C07D201/08 ,  C07D201/16

Abstract: Lactam liquid media of reaction which comprise at least one lactam final product, notably null-caprolactam, are treated and purified to convert impurities contained therein into harmless species or species easily removed downstream, by hydrogenating such liquid media of reaction in the presence of a hydrogenation catalyst and during which hydrogenation the liquid media of reaction have effective lactam-purifying amounts of ammonia dissolved therein.

Abstract translation: 包含至少一种内酰胺最终产物，特别是ε-己内酰胺的反应液体反应介质被处理和纯化，以将其中所含的杂质转化成无害物质或容易从下游去除的物质，通过在氢化存在下氢化这种反应液体介质 催化剂，在此期间氢化反应液体介质有有效的内酰胺纯化量溶于其中。