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    • 6. 发明申请
    • Process for producing epsilon-caprolactone
    • 生产ε-己内酯的方法
    • US20040087804A1
    • 2004-05-06
    • US10688926
    • 2003-10-21
    • Eiji OharaKen-ichiro Kawazumi
    • C07D313/16
    • C07D315/00B01D3/146
    • A process produces null-caprolactone by the oxidation of cyclohexanone by feeding a crude reaction mixture to a first distillation column; distilling off a first distillate containing low boiling components including unreacted cyclohexanone from the top of the first distillation column; recovering a first side-cut fraction containing unreacted cyclohexanone in a higher concentration than in the first distillate from an intermediate tray; recovering a first bottom liquid containing high boiling components including null-caprolactone from the bottom; introducing the first side-cut fraction to a second distillation column; recovering a second bottom liquid containing unreacted cyclohexanone from the bottom of the second distillation column; recycling the second bottom liquid into the raw material cyclohexanone; introducing the first bottom liquid to a third distillation column to thereby yield a third distillate containing null-caprolactone from the third distillation column.
    • 通过将粗反应混合物进料至第一蒸馏塔,通过环己酮的氧化产生ε-己内酯; 从第一蒸馏塔的顶部蒸馏出含有低沸点组分(包括未反应的环己酮)的第一馏出物; 从中间托盘回收含有比在第一馏出物中更高浓度的未反应的环己酮的第一侧馏分; 从底部回收含有高沸点组分(包括ε-己内酯)的第一底液; 将第一侧馏分引入第二蒸馏塔; 从第二蒸馏塔的底部回收含有未反应的环己酮的第二底液; 将第二底液再循环到原料环己酮中; 将第一底液引入第三蒸馏塔,从而从第三蒸馏塔得到含有ε-己内酯的第三馏出物。