Invention Grant
- Patent Title: Process for the recovery of ε-caprolactam from extract water
- Patent Title (中): 从萃取水中回收ε-己内酰胺的方法
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Application No.: US14917808Application Date: 2014-07-07
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Publication No.: US09562008B2Publication Date: 2017-02-07
- Inventor: Andreas Bormann , Manfred Albrecht , Franz Samlitschka
- Applicant: Technip Zimmer GmbH
- Applicant Address: DE Frankfurt
- Assignee: Technip Zimmer GmbH
- Current Assignee: Technip Zimmer GmbH
- Current Assignee Address: DE Frankfurt
- Agency: Hamre, Schumann, Mueller & Larson, P.C.
- Priority: DE102013107238 20130709
- International Application: PCT/EP2014/064462 WO 20140707
- International Announcement: WO2015/004062 WO 20150115
- Main IPC: C07D201/16
- IPC: 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.
Public/Granted literature
- US20160221943A1 PROCESS FOR THE RECOVERY OF EPSILON-CAPROLACTAM FROM EXTRACT WATER Public/Granted day:2016-08-04
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