Recovery of caprolactam from distillation residues obtained in the
purification of caprolactam
    3.
    发明授权
    Recovery of caprolactam from distillation residues obtained in the purification of caprolactam 失效
    从己内酰胺纯化中获得的蒸馏残余物中回收己内酰胺

    公开(公告)号:US5441607A

    公开(公告)日:1995-08-15

    申请号:US265740

    申请日:1994-06-27

    CPC分类号: C07D201/12 C07D201/16

    摘要: Recovery of caprolactam and of an alkali metal carbonate from distillation residues which are obtained in the purification of caprolactam and contain caprolactam and/or oligomers and/or polymers of caprolactam and also alkali metal hydroxides by(a) melting the distillation residues, the caprolactam and/or oligomers and/or polymers of caprolactam and alkali metal hydroxides,(b) continuously removing caprolactam from the melt,(c) after removing caprolactam, cooling the melt and obtaining a residue,(d) dissolving the residue thus obtained in water and(e) subjecting the aqueous solution thus obtained to combustion with the formation of an alkali metal carbonateis described.

    摘要翻译: 从纯化己内酰胺获得的己内酰胺和碱金属碳酸盐回收己内酰胺和/或己内酰胺和/或己内酰胺的聚合物和/或碱金属氢氧化物的齐聚物和/或碱金属氢氧化物,通过(a)将蒸馏残余物,己内酰胺和 /或己内酰胺和碱金属氢氧化物的低聚物和/或聚合物,(b)从熔体中连续除去己内酰胺,(c)除去己内酰胺后,冷却熔体并获得残余物,(d)将由此获得的残余物溶于水和 (e)描述了所得到的水溶液在形成碱金属碳酸盐时的燃烧。