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    Depolymerization of condensation polymers
    21.
    发明授权
    Depolymerization of condensation polymers 失效
    缩聚物的解聚

    公开(公告)号：US4605762A

    公开(公告)日：1986-08-12

    申请号：US563812

    申请日：1983-12-21

    Applicant: Jorge W. Mandoki

    Inventor： Jorge W. Mandoki

    IPC: C07C27/02 ,  C07C51/09 ,  C07D201/12 ,  C07C51/487 ,  C07C85/26 ,  C07D487/00

    CPC classification number: C08J11/14 ,  C07C51/09 ,  C07D201/12 ,  C08J2367/02 ,  Y02W30/704

    Abstract: A process for the neutral hydrolytic depolymerization of condensation polymers is described. The process is conducted in a continuous manner and comprises introducing condensation polymer waste material into an aqueous hydrolysis zone at a temperature of between 200.degree. C. and 300.degree. C. and superatmospheric pressure of at least 15 atmospheres. High pressure steam is introduced into the lower portion of the hydrolysis zone underneath the level of the condensation polymer waste material. The steam serves as the principal source of heat for the hydrolysis zone. By being introduced underneath the level of the condensation polymer waste material, the steam agitates the waste material to provide heat transfer to accelerate the hydrolysis reaction. Further, a portion of the steam condenses to provide water which is a reactant in the hydrolysis reaction. An aqueous solution of the product(s) of the hydrolysis reaction is withdrawn from an upper portion of the hydrolysis zone.

    Abstract translation: 描述了缩合聚合物的中性水解解聚的方法。 该方法以连续的方式进行，并且包括在200℃至300℃的温度和至少15个大气压的超大气压下将缩合聚合物废料引入水性水解区。 将高压蒸汽引入到缩合聚合物废料的水平面下方的水解区的下部。 蒸汽作为水解区的主要热源。 通过在冷凝聚合物废料的水平下引入，蒸汽搅动废料以提供热传递以加速水解反应。 此外，一部分蒸汽冷凝以提供作为水解反应中的反应物的水。 水解反应产物的水溶液从水解区的上部排出。

    Continuous process for the recovery of caprolactam
    24.
    发明授权
    Continuous process for the recovery of caprolactam 失效
    持续的己内酰胺回收方法

    公开(公告)号：US4107160A

    公开(公告)日：1978-08-15

    申请号：US827370

    申请日：1977-08-24

    Applicant: Ovidiu Dicoi ,  Erwin Doerr

    Inventor： Ovidiu Dicoi ,  Erwin Doerr

    IPC: C07D201/12 ,  C07D201/16

    CPC classification number: C07D201/16 ,  C07D201/12

    Abstract: A process for the continuous recovery of caprolactam from either solid polycaprolactam waste by depolymerization or from liquid polycaprolactam extraction water from an extraction zone where, in either instance, a caprolactam water vapor mixture is produced and subsequently upgraded in a distillation zone to provide a dilute mixture of caprolactam and water vapor. A minor portion of this dilute caprolactam water vapor is condensed and recycled to the distillation zone. The remaining, major portion of this mixture is compressed and admixed with fresh steam, superheated and passed to either the extraction zone or depolymerization reaction.

    Abstract translation: 从固体聚己内酰胺废物通过解聚连续回收己内酰胺或从液体聚己内酰胺萃取水中从萃取区连续回收己内酰胺的方法，其中在任何一种情况下产生己内酰胺水蒸气混合物，随后在蒸馏区中升级以提供稀释混合物 的己内酰胺和水蒸汽。 该稀少己内酰胺水蒸气的一小部分被冷凝并再循环到蒸馏区。 将该混合物的剩余部分压缩并与新鲜蒸汽混合，过热并通过萃取区或解聚反应。

    Method for the manufacture of caprolactam from waste containing polyamides
    28.
    发明授权
    Method for the manufacture of caprolactam from waste containing polyamides 失效
    从含有聚酰胺的废物制造己内酰胺的方法

    公开(公告)号：US07173127B2

    公开(公告)日：2007-02-06

    申请号：US10457831

    申请日：2003-06-09

    Applicant: Claus Born ,  Rudolf K{hacek over (a)}mpf ,  Joachim Seelig ,  Reinhard Wolf

    Inventor： Claus Born ,  Rudolf K{hacek over (a)}mpf ,  Joachim Seelig ,  Reinhard Wolf

    IPC: C07D201/16

    CPC classification number: C07D201/12

    Abstract: This invention relates to a continuous and efficient method for the manufacture of highly pure caprolactam suitable for the polycondensation of Polyamide 6 (polycaprolactam) from polyamide waste. In particular the invention relates to a method for the manufacture of caprolactam from waste containing polyamides, including the steps a) depolymerisation of the waste containing polyamides, whereby a caprolactam raw material and a flow containing secondary constituents or additives is obtained, b) at least one distillation of the caprolactam raw material, and c) at least one crystallisation of the caprolactam material obtained in step b), by which means caprolactam is obtained, whereby at least part of the caprolactam obtained in step c) with a permanganate number of

    Abstract translation: 本发明涉及用于制备适用于聚酰胺废物聚酰胺6（聚己内酰胺）缩聚的高纯度己内酰胺的连续和有效的方法。 具体地说，本发明涉及一种从含有聚酰胺的废物中制造己内酰胺的方法，包括以下步骤：a）对含有废物的聚酰胺进行解聚，由此得到己内酰胺原料和含有二级成分或添加剂的流体，b）至少 己内酰胺原料的一次蒸馏，和c）步骤b）中获得的己内酰胺材料的至少一种结晶，通过该方法获得己内酰胺，由此至少部分步骤c）中获得的己内酰胺的高锰酸盐数目< 10000秒 并且在解聚之前和/或期间，将含有<85％的UV透射率加入到含废物的聚酰胺中。

    Process for the preparation of epsilon-caprolactam
    30.
    发明申请
    Process for the preparation of epsilon-caprolactam 失效
    制备ε-己内酰胺的方法

    公开(公告)号：US20030065169A1

    公开(公告)日：2003-04-03

    申请号：US10210878

    申请日：2002-08-02

    Applicant: DSM N.V.

    Inventor： Frank P.W. Agterberg ,  Rudolf P.M. Guit ,  Matthias R.J. Offermanns

    IPC: C07D21/08 ,  C08G069/08 ,  C08G073/10

    CPC classification number: C07D201/12 ,  C07D201/08

    Abstract: A process for the preparation of null-caprolactam starting from 6-aminocaproic acid, 6-aminocaproamide, 6-aminocaproic ester, 6-aminocapronitrile, oligomers or polymers of these compounds or mixtures comprising at least two of these compounds, which process is performed in the presence of N-(5-carboxypentyl)-null-caprolactam and/or derivative thereof in an amount of less than 50 wt. % and more than 0.1 wt. % (based on the total reaction mixture).

    Abstract translation: 从6-氨基己酸，6-氨基己酰胺，6-氨基己酸酯，6-氨基己腈，这些化合物的低聚物或聚合物或包含这些化合物中的至少两种的混合物制备ε-己内酰胺的方法，该方法在 N-（5-羧戊基） - 己内酰胺和/或其衍生物的存在量小于50wt。 ％和大于0.1wt。 ％（基于总反应混合物）。

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