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：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。

公开(公告)号：US5495015A

公开(公告)日：1996-02-27

申请号：US355286

申请日：1994-12-12

Applicant: Peter Bassler ,  Michael Kopietz

Inventor： Peter Bassler ,  Michael Kopietz

IPC: B03B9/06 ,  C07D201/12 ,  C08J11/14

CPC classification number: C07D201/12

Abstract: Caprolactam is obtained from caprolactam-containing polymers in the presence of superheated water by bringing polymers which contain the repeating unit--[--N(H)--(CH.sub.2).sub.5 --C(O)--]--or mixtures consisting essentially of______________________________________from 40 to 99.9% by weight of a polymer containing the repeat- ing 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 60% by weight of polyamides, with the exception of polycaprolactam and copolyamides prepared from caprolactam,______________________________________into contact with superheated water at from 280.degree. to 320.degree. C. and from 7.5 to 15 MPa and a weight ratio of water to polymer containing the repeating unit --[--N(H)--(CH.sub.2).sub.5 --C(O)--]-- of from 5:1 to 13:1 and in a reaction time of less than 3 hours, with the proviso that the reaction mixture, consisting essentially of water and the polymer used or the mixture used, contains no gaseous phase under the conditions of the hydrolysis.

Abstract translation: 在过热水存在下，通过使含有重复单元 - [ - N（H） - （CH 2）5 -C（O） - ] - 的聚合物或由基本上由40组成的混合物 至99.9重量％的含有重复单元的聚合物 - [-N（H） - （CH 2）5 -C（O） - ] - ， - 0.01-50重量％ - 由无机填料，有机和无机颜料和染料组成， - 0至10重量％的有机和/或无机添加剂， - 0至40重量％的非聚酰胺含聚合物和 - 0至60重量％的聚酰胺，除了由己内酰胺制备的聚己内酰胺和共聚酰胺与280℃至320℃和7.5至15MPa的过热水接触，并且水与 含有重复单元的聚合物 - [ - N（H） - （CH2）5-C（O） - ] - 为5：1至13：1，反应时间小于3小时，条件是 反应mi 主要由水组成，所使用的聚合物或所使用的混合物在水解条件下不含气相。

公开(公告)号：US5458740A

公开(公告)日：1995-10-17

申请号：US205979

申请日：1994-03-04

Applicant: Thomas P. Losier ,  Donald R. Johnson ,  Hugo Fuchs ,  Gerald Neubauer ,  Josef Ritz

Inventor： Thomas P. Losier ,  Donald R. Johnson ,  Hugo Fuchs ,  Gerald Neubauer ,  Josef Ritz

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

CPC classification number: C07D201/12 ,  C07D201/16 ,  Y10S203/90

Abstract: A process for the purification of caprolactam from crude caprolactam by distilling the crude caprolactam in the presence of an anorganic or organic acid.

Abstract translation: 通过在无机或有机酸的存在下蒸馏粗己内酰胺从粗己内酰胺纯化己内酰胺的方法。

公开(公告)号：US5395974A

公开(公告)日：1995-03-07

申请号：US184335

申请日：1994-01-21

Applicant: Ronald J. McKinney

Inventor： Ronald J. McKinney

IPC: C07D207/12 ,  B01J27/08 ,  C07B35/06 ,  C07B61/00 ,  C07C209/62 ,  C07C211/12 ,  C07C231/14 ,  C07C237/06 ,  C07C253/20 ,  C07C253/24 ,  C07C255/04 ,  C07C255/19 ,  C07C255/24 ,  C07D201/12

CPC classification number: C07C209/62 ,  C07C253/20 ,  C07D201/12

Abstract: The present invention relates to a method of reacting polyamides or mixtures thereof with ammonia to obtain a mixture of monomers. The reaction is carried out in the presence of certain Lewis Acid catalyst precursors.

Abstract translation: 本发明涉及使聚酰胺或其混合物与氨反应以获得单体混合物的方法。 反应在某些路易斯酸催化剂前体存在下进行。

公开(公告)号：US5360905A

公开(公告)日：1994-11-01

申请号：US60972

申请日：1993-05-14

Applicant: Hugo Fuchs ,  Claus-Ulrich Priester ,  Gerald Neubauer ,  Erwin Brunner ,  Josef Ritz ,  Michael Kopietz

Inventor： Hugo Fuchs ,  Claus-Ulrich Priester ,  Gerald Neubauer ,  Erwin Brunner ,  Josef Ritz ,  Michael Kopietz

IPC: C08J11/00 ,  C07D201/12 ,  C08J11/14

CPC classification number: C07D201/12

Abstract: A process for recovering caprolactam from oligomers and/or polymers of caprolactam comprises the following steps:a) treating oligomers and/or polymers of caprolactam with from 1 to 20 parts by weight of water per part by weight of oligomer or polymer at from 200.degree. to 350.degree. C. under superatmospheric pressure with a residence time of from 0.5 to 10 hours to form an aqueous reaction mixture comprising polycaprolactam, monomeric caprolactam and oligomers thereof, andb) passing the aqueous reaction mixture obtained in a) into a fluidized bed of alumina at from 250.degree. to 400.degree. C. to obtain a mixture of steam and caprolactam.

Abstract translation: 从己内酰胺的低聚物和/或聚合物中回收己内酰胺的方法包括以下步骤：a）在200℃下用每重量份低聚物或聚合物1至20重量份水处理己内酰胺的低聚物和/或聚合物 在超大气压下加热至350℃，停留时间为0.5至10小时，以形成包含聚己内酰胺，单体己内酰胺及其低聚物的含水反应混合物，和b）将a）中得到的含水反应混合物送入流化床 氧化铝在250-400℃下反应，得到蒸汽与己内酰胺的混合物。

公开(公告)号：US4683305A

公开(公告)日：1987-07-28

申请号：US883177

申请日：1986-07-08

Applicant: Hugo Fuchs ,  Uwe Brand ,  Helmut Buchaeckert

Inventor： Hugo Fuchs ,  Uwe Brand ,  Helmut Buchaeckert

IPC: C07D201/12

CPC classification number: C07D201/12

Abstract: Caprolactam is obtained by cleaving oligomers of caprolactam by a process in which the oligomers, in a liquid or solid state, are introduced into a fluidized alumina bed and cleaved at from 290.degree. to 400.degree. C. in the presence of steam, and, in addition to the amount of inert gas required to fluidize the alumina bed, from 0.1 to 3 times this amount of inert gas is introduced above the fluidized bed.

Abstract translation: 己内酰胺是通过以下方法裂解己内酰胺的低聚物来获得的：己内酰胺的低聚物是将液体或固体状态的低聚物引入流化的氧化铝床中，并在蒸气存在的情况下在290℃-400℃下裂解， 除了流化氧化铝床所需的惰性气体的量之外，将0.1-3倍量的惰性气体引入到流化床之上。

公开(公告)号：US4311642A

公开(公告)日：1982-01-19

申请号：US187864

申请日：1980-09-17

Applicant: Lamberto Crescentini ,  Webb B. Blackman, Jr. ,  Joseph D. DeCaprio ,  William B. Fisher ,  Roy J. Lilley, Jr. ,  John W. Wagner

Inventor： Lamberto Crescentini ,  Webb B. Blackman, Jr. ,  Joseph D. DeCaprio ,  William B. Fisher ,  Roy J. Lilley, Jr. ,  John W. Wagner

IPC: C07D201/12 ,  C07D201/16

CPC classification number: C07D201/12 ,  C07D201/16

Abstract: This invention is the method to recover caprolactam from a concentrated nylon 6 chip wash water containing water, cyclic oligomer, and caprolactam. The method comprises feeding the concentrated wash water to a wiped-film evaporator operated at a temperature of from about 200.degree. C. to 300.degree. C. and a pressure from about 10 to about 250 Torr, thereby separating the wash water into (a) an overhead stream of water and caprolactam and (b) a bottom stream of caprolactam and cyclic oligomers, then recovering the caprolactam from the overhead stream. The caprolactam in the bottom stream can also be recovered, and the cyclic oligomers depolymerized to caprolactam for recovery.

Abstract translation: 本发明是从含有水，环状低聚物和己内酰胺的浓缩尼龙6片洗涤水中回收己内酰胺的方法。 该方法包括将浓缩的洗涤水加入到在约200℃至300℃的温度和约10至约250托的压力下操作的擦膜蒸发器，从而将洗涤水分离成（a） 水和己内酰胺的顶部物流和（b）己内酰胺和环状低聚物的底部流，然后从顶部物流中回收己内酰胺。 也可以回收底部流中的己内酰胺，环状低聚物解聚为己内酰胺以进行回收。