发明名称 |
RECOVERY OF EPSILON-CAPROLACTAM FROM AQUEOUS MIXTURES |
摘要 |
Process to separate epsi-caprolactam from an aqueous mixture containing epsi-caprolactam and at least 0.5 wt % oligomers, wherein the separation is performed by extraction using an organic extraction agent. The aqueous mixture may be obtained in a process to prepare epsi-caprolactam starting from 6-aminocapronitrile or in a process to prepare epsi-caprolactam starting from 6-aminocaproic acid. |
申请公布号 |
EP0891327(B1) |
申请公布日期 |
2002.12.18 |
申请号 |
EP19970902722 |
申请日期 |
1997.02.05 |
申请人 |
DSM N.V.;E.I. DU PONT DE NEMOURS AND COMPANY |
发明人 |
GUIT, RUDOLF, PHILUPPUS, MARIA;FRENTZEN, YVONNE, HELENE |
分类号 |
C07D201/00;C07D201/08;C07D201/16;C07D223/10 |
主分类号 |
C07D201/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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