公开(公告)号：US20160221943A1

公开(公告)日：2016-08-04

申请号：US14917808

申请日：2014-07-07

Applicant: TECHNIP ZIMMER GMBH

Inventor： Andreas Bormann ,  Manfred Albrecht ,  Franz Samlitschka

IPC: C07D201/16

CPC classification number: C07D201/16

Abstract: A process for the recovery of ε-caprolactam from extract water of polycaprolactam obtained by hydrolytic polymerization, wherein the extract water is concentrated, subsequently contained oligomers are depolymerized, non-depolymerizable impurities are separated, water and low-boiling impurities are removed, wherein for adjusting the purity of the recovered ε-caprolactam and the energy consumption used for the process a part of the product is removed from the process as intermediate products.

Abstract translation: 从通过水解聚合获得的聚己内酰胺的萃取水中回收ε-己内酰胺的方法，其中提取水浓缩，随后包含的低聚物被解聚，不可解聚的杂质被分离，除去水和低沸点杂质，其中对于 调整回收的ε-己内酰胺的纯度和用于该方法的一部分产品所用的能量消耗作为中间产物。

公开(公告)号：US09562008B2

公开(公告)日：2017-02-07

申请号：US14917808

申请日：2014-07-07

Applicant: Technip Zimmer GmbH

Inventor： Andreas Bormann ,  Manfred Albrecht ,  Franz Samlitschka

IPC: C07D201/16

CPC classification number: C07D201/16

Abstract: A process for the recovery of ε-caprolactam from extract water of polycaprolactam obtained by hydrolytic polymerization, wherein the extract water is concentrated, subsequently contained oligomers are depolymerized, non-depolymerizable impurities are separated, water and low-boiling impurities are removed, wherein for adjusting the purity of the recovered ε-caprolactam and the energy consumption used for the process a part of the product is removed from the process as intermediate products.

Abstract translation: 从通过水解聚合获得的聚己内酰胺的萃取水中回收ε-己内酰胺的方法，其中提取水浓缩，随后包含的低聚物被解聚，不可解聚的杂质被分离，除去水和低沸点杂质，其中对于 调整回收的ε-己内酰胺的纯度和用于该方法的一部分产品所用的能量消耗作为中间产物。