公开(公告)号：US3459640A

公开(公告)日：1969-08-05

申请号：US3459640D

申请日：1966-04-06

Applicant: TEIJIN LTD

Inventor： TSUNAWKI SHIGEMITSU ,  FURUSAWA YUTAKA

IPC: C07D201/12 ,  B01D3/08 ,  B01D3/06

CPC classification number: C07D201/12

公开(公告)号：US3317519A

公开(公告)日：1967-05-02

申请号：US45785365

申请日：1965-05-21

Applicant: ALLIED CHEM

Inventor： LAZARUS STANLEY D ,  TWILLEY IAN C ,  SNIDER ORVILL E

IPC: C07C51/09 ,  C07D201/12

CPC classification number: C07D201/12 ,  C07C51/09 ,  Y10S525/938

公开(公告)号：US06841666B2

公开(公告)日：2005-01-11

申请号：US10473077

申请日：2002-03-22

Applicant: Wim Buijs ,  Henricus Franciscus Wilhelmus Wolters

Inventor： Wim Buijs ,  Henricus Franciscus Wilhelmus Wolters

IPC: C07D201/08 ,  C07D201/12 ,  C07D201/16 ,  C08G69/16 ,  C08L77/00

CPC classification number: C08G69/16 ,  C07D201/08

Abstract: The invention relates to a process for the preparation ε-caprolactam starting from 6-aminocapronitrile by hydrolysis/oligomerisation followed by de-oligomerisation/cyclisation using superheated steam characterized in that the hydrolysis/oligomerisation is performed with superheated steam converting 6-aminocapronitrile into a molten phase and a gas phase comprising ammonia, ammonia is continuously separated off and the de-oligomerisation/cyclisation is performed by treating the molten phase further with superheated steam. The invention also relates to a process for the preparation of ε-caprolactam starting from 6-aminocapronitrile by hydrolysis/oligomerisation followed by de-oligomerisation/cyclisation characterized in that the preparation is performed in a horizontal scraped-surface reactor, the hydrolysis/oligomerisation is performed with superheated steam converting 6-aminocapronitrile into a molten phase and a gas phase comprising ammonia, ammonia is continuously separated off and the de-oligomerisation/cyclisation is performed by treating the molten phase further with superheated steam.

Abstract translation: 本发明涉及一种从6-氨基己腈开始通过水解/低聚制备ε-己内酰胺，然后使用过热蒸汽进行脱低聚/环化的方法，其特征在于水解/低聚反应用过热蒸汽将6-氨基己腈转化成熔融 相和包含氨的气相，氨被连续分离，并且通过用过热蒸汽进一步处理熔融相进行脱低聚/环化。 本发明还涉及从6-氨基己腈开始制备ε-己内酰胺的方法，其通过水解/低聚，接着进行脱低聚/环化，其特征在于制备在水平刮面反应器中进行，水解/低聚是 使用过热蒸汽将6-氨基己腈转化成熔融相和包含氨的气相，连续分离氨，通过用过热蒸汽进一步处理熔融相进行脱低聚/环化。

公开(公告)号：US06111099A

公开(公告)日：2000-08-29

申请号：US5512

申请日：1998-01-12

Applicant: Yvonne H Frentzen ,  Marcellinus P. G. Thijert ,  Rudolf L. Zwart

Inventor： Yvonne H Frentzen ,  Marcellinus P. G. Thijert ,  Rudolf L. Zwart

IPC: C07D201/12 ,  C07D201/16

CPC classification number: C07D201/12

Abstract: A process for depolymerizing nylon 6 and recovering caprolactam from the depolymerized products by extraction with alkyl phenolic compounds. Process steps include (a) treating a first mixture comprising nylon 6 with water at a temperature between about 200.degree. C. and about 400.degree. C. to yield a second mixture comprising depolymerized nylon 6 components, wherein the second mixture contains caprolactam at a concentration between about 5 wt. % and about 35 wt. %; (b) optionally, separating insoluble material from the second mixture; (c) extracting the second mixture with an extraction agent to yield an aqueous raffinate third mixture and an organic phase fourth mixture comprising caprolactam and the extraction agent, wherein the extraction agent is an alkyl phenol having a boiling point higher than that of the caprolactam; (d) recovering caprolactam from the organic phase fourth mixture by distillation; (e) recycling the aqueous raffinate third mixture to step (a).

Abstract translation: 一种通过用烷基酚类化合物萃取从解聚产物中解聚尼龙6并回收己内酰胺的方法。 工艺步骤包括（a）在约200℃至约400℃之间的温度下处理包含尼龙6的第一混合物与水，以产生包含解聚的尼龙6组分的第二混合物，其中第二混合物含有浓度为的己内酰胺 约5wt。 ％和约35wt。 ％; （b）任选地，从第二混合物中分离不溶物质; （c）用提取剂萃取第二混合物，得到含水萃余液第三混合物和包含己内酰胺和提取剂的有机相第四混合物，其中提取剂是沸点高于己内酰胺的沸点的烷基苯酚; （d）通过蒸馏从有机相第四混合物中回收己内酰胺; （e）将含水萃余液第三混合物再循环到步骤（a）。

公开(公告)号：US6093788A

公开(公告)日：2000-07-25

申请号：US169531

申请日：1998-10-09

Applicant: Claus Born ,  Stefan Deibert ,  Jurgen Schiwek ,  Konrad Wolf

Inventor： Claus Born ,  Stefan Deibert ,  Jurgen Schiwek ,  Konrad Wolf

IPC: B01D1/26 ,  C02F1/04 ,  C07D201/12 ,  C08G69/16 ,  C08G69/18 ,  C08G69/00 ,  C08G73/10

CPC classification number: B01D1/26 ,  C02F1/048 ,  C07D201/12 ,  C08G69/16 ,  C08G69/18

Abstract: The invention comprises a process of producing .epsilon.-caprolactam from extract water of polycaprolactam obtained by hydrolytic polymerization, wherein(i) the extract water is concentrated by distillation of water,(ii) from the concentrated extract water from stage (i) an extract of .epsilon.-caprolactam and oligomers including dimers is obtained by separating an .epsilon.-caprolactam/water vapor mixture,(iii) the extract from stage (ii) is depolymerized in the presence of a catalyst and superheated steam, where a vapor mixture of .epsilon.-caprolactam and water is obtained, and(iv) from the .epsilon.-caprolactam/water vapor mixtures of process stages (ii) and (iii) .epsilon.-caprolactam with a dimer content of .ltoreq.0.2 wt-% is obtained by distillation of water.

Abstract translation: 本发明包括从通过水解聚合获得的聚己内酰胺的提取水中生产ε-己内酰胺的方法，其中（i）通过蒸馏水将提取物的水浓缩，（ii）来自阶段（i）的浓缩提取物水， ε-己内酰胺和包含二聚体的低聚物通过分离ε-己内酰胺/水蒸汽混合物而获得，（iii）在催化剂和过热蒸汽的存在下将阶段（ii）的提取物解聚，其中ε-己内酰胺 并且获得水，并且（iv）通过蒸馏水获得具有二元含量

公开(公告)号：US6020486A

公开(公告)日：2000-02-01

申请号：US115234

申请日：1998-07-14

Applicant: Martin Booij ,  Yvonne Helene Frentzen ,  Bart Kurt Stefaan Hommez ,  Eric Jozef Goethals

Inventor： Martin Booij ,  Yvonne Helene Frentzen ,  Bart Kurt Stefaan Hommez ,  Eric Jozef Goethals

IPC: C08F8/50 ,  B01J23/04 ,  B01J27/16 ,  C07C231/00 ,  C07D201/12 ,  C08J11/10 ,  C08J11/24

CPC classification number: C08J11/24 ,  C07D201/12 ,  C08J2377/00 ,  Y02W30/706

Abstract: The invention relates to a process for depolymerising one or more polyamides in the presence of at least an aliphatic alcohol, the depolymerisation taking place with at most 40 mol. % catalyst. This process provides good selectivity towards the monomeric components of polyamides. This process moreover causes as few waste streams as possible.

Abstract translation: 本发明涉及一种在至少一种脂族醇存在下解聚一种或多种聚酰胺的方法，解聚发生至多40mol。 ％催化剂。 该方法为聚酰胺的单体组分提供了良好的选择性。 此过程还会导致尽可能少的废物流。

公开(公告)号：US5750791A

公开(公告)日：1998-05-12

申请号：US697116

申请日：1996-08-20

Applicant: Darwin Darrell Davis ,  Eugene Dennis Wilhoit

Inventor： Darwin Darrell Davis ,  Eugene Dennis Wilhoit

IPC: C07B61/00 ,  C07C51/06 ,  C07C53/126 ,  C07C55/14 ,  C07C209/62 ,  C07C211/12 ,  C07D201/12

CPC classification number: C07C51/06

Abstract: Dicarboxylic acid and diamine are recovered from polyamides by hydrolysis with nitric acid, followed by separation of the dicarboxylic acid, and hydrogenation of the nitric acid, and then recovery of the diamine.

Abstract translation: 通过用硝酸水解从聚酰胺中回收二羧酸和二胺，然后分离二羧酸，硝化氢化，然后回收二胺。

公开(公告)号：US5717111A

公开(公告)日：1998-02-10

申请号：US618441

申请日：1996-03-08

Applicant: Guenther Koehler ,  Marcel Feld ,  Josef Metz

Inventor： Guenther Koehler ,  Marcel Feld ,  Josef Metz

IPC: C07D201/12 ,  C07D307/33 ,  C07D321/00 ,  C07D323/00 ,  C07D313/00

CPC classification number: C07D323/00 ,  C07D321/00

Abstract: Process for the preparation of macrocyclic compounds by condensation of at least difunctional compounds and subsequent thermal depolymerization in the presence of catalysts, wherein thermal depolarization is carried out in solvent of the formula ##STR1## where R.sup.1 and R.sup.2 represent identical or different aliphatic C.sub.1-6 hydrocarbon radicals with or without functional groups and having number average molecular weights (Mn) from 500 to 3,000, from which the value of n inevitably follows, at a pressure of less than 50 hPa and at a temperature of 200 to 300.degree. C., 5 to 1,000 parts by weight of solvent being used per part by weight of macrocyclic compound.

Abstract translation: 用于通过至少二官能化合物的缩合制备大环化合物的方法和在催化剂存在下随后的热解聚反应的方法，其中热去极化在式Ⅰ的溶剂中进行，其中R 1和R 2表示相同或不同的脂族C1- 6个具有或不具有官能团的烃基，其数值平均分子量（Mn）为500至3,000，n值不可避免地在小于50hPa的压力和200至300℃的温度下。 ，每重量份的大环化合物使用5〜1000重量份的溶剂。

公开(公告)号：US5637700A

公开(公告)日：1997-06-10

申请号：US297719

申请日：1994-08-30

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: 通过氧化处理纯化己内酰胺，其中基本上含有要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：US5536831A

公开(公告)日：1996-07-16

申请号：US355285

申请日：1994-12-12

Applicant: Michael Kopietz ,  Alan Handerman ,  Simon Jones ,  Ulrich Kalck ,  Claus-Ulrich Priester ,  Heinz Auer ,  Josef Ritz ,  Hugo Fuchs ,  Paul Pijl

Inventor： Michael Kopietz ,  Alan Handerman ,  Simon Jones ,  Ulrich Kalck ,  Claus-Ulrich Priester ,  Heinz Auer ,  Josef Ritz ,  Hugo Fuchs ,  Paul Pijl

IPC: B01J8/10 ,  C07D201/12 ,  C08G69/14 ,  C08J11/16

CPC classification number: C07D201/12

Abstract: Caprolactam is obtained from caprolactam-containing polymers in the presence of a base under reduced pressure by depolymerizing polymers which contain the repeating unit --[--N(H)--(CH.sub.2).sub.5 --C(O)--] or mixtures consisting essentially offrom 50 to 99.99% by weight of a polymer containing the repeating unit --[--N(H)--(CH.sub.2).sub.5 --C(O)--]--from 0.01 to 50% by weight of additives selected from the group consisting of inorganic fillers, organic and inorganic pigments and dyes,from 0 to 10% by weight of organic and/or inorganic additives,from 0 to 40% by weight of non-polyamide-containing polymers andfrom 0 to 20% by weight of polyamides, with the exception of polycaprolactam and copolyamides prepared from caprolactam,in at least two depolymerization reactors connected in series.

Abstract translation: 己内酰胺通过在碱存在下在减压下由含有重复单元 - [ - N（H） - （CH 2）5 -C（O） - ]的聚合物或基本上由 50至99.99重量％的含有重复单元的聚合物 - [ - N（H） - （CH 2）5 -C（O） - ] - 0.01至50重量％的选自无机填料 有机和无机颜料和染料，0至10重量％的有机和/或无机添加剂，0至40重量％的非聚酰胺聚合物和0至20重量％的聚酰胺，其中 在由至少两个解聚反应器串联连接的己内酰胺制备的聚己内酰胺和共聚酰胺的例外。