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    • 123. 发明授权
    • Simultaneous preparation of caprolactam and hexamethylenediamine
    • 同时制备己内酰胺和己二胺
    • US5717090A
    • 1998-02-10
    • US565214
    • 1995-11-30
    • Peter BasslerHermann LuykenGunther AchhammerTom WitzelEberhard FuchsRolf FischerWerner Schnurr
    • Peter BasslerHermann LuykenGunther AchhammerTom WitzelEberhard FuchsRolf FischerWerner Schnurr
    • C07D201/08
    • C07D201/08
    • Caprolactam and hexamethylenediamine are prepared simultaneously starting from adiponitrile by a process in which (a) adiponitrile is partially hydrogenated to give a mixture containing essentially 6-aminocapronitrile, hexamethylenediamine, ammonia, adiponitrile and hexamethyleneimine, (b) the mixture obtained in (a) is subjected to a distillation to give ammonia as the top product and a bottom product I, (c) the bottom product I containing essentially 6-aminocapronitrile, hexamethylenediamine, adiponitrile, hexamethyleneimine, inert compound A and ammonia, the ammonia content being lower than that of the mixture used in stage (b), is subjected to a second distillation to give a mixture comprising the inert compound A and ammonia as the top product and a bottom product II, (d) the bottom product II is subjected, in a third column, to a distillation to give the inert compound A as the top product and a bottom product III, (e) the bottom product III is subjected, in a fourth column, to a distillation to give a top product KP1, containing essentially hexamethyleneimine and a bottom product IV, (f) the top product KP1 is subjected, in a fifth column, to a distillation to give a top product KP2, which contains essentially hexamethyleneimine, and (g) the bottom product IV containing essentially 6-aminocapronitrile and adiponitrile is subjected, in a sixth column, to a distillation to give 6-aminocapronitrile, and the 6-aminocapronitrile thus obtained is then cyclized to give caprolactam.
    • 己二醇和六亚甲基二胺由己二腈通过以下方法同时制备,其中(a)己二腈部分氢化得到基本上含有6-氨基己腈,六亚甲基二胺,氨,己二腈和六亚甲基亚胺的混合物,(b)将(a)中得到的混合物 进行蒸馏以产生氨作为顶部产物,底部产物I,(c)含有基本上为6-氨基己腈,六亚甲基二胺,己二腈,六亚甲基亚胺,惰性化合物A和氨的底部产物I,氨含量低于 将阶段(b)中使用的混合物进行第二次蒸馏,得到包含惰性化合物A和氨作为顶部产物的混合物和底部产物II,(d)底部产物II经受第三塔 进行蒸馏,得到惰性化合物A作为顶部产物和底部产物III,(e)底部产物III在第四列中经受 蒸馏得到基本上为六亚甲基亚胺和底部产物IV的顶部产物KP1,(f)顶部产物KP1在第五个塔中进行蒸馏,得到基本上含有六亚甲基亚胺的顶部产物KP2,和(g )将含有基本上6-氨基己腈和己二腈的底部产物IV在第六塔中进行蒸馏以得到6-氨基己腈,然后将所得的6-氨基己腈环化,得到己内酰胺。