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    • 1. 发明授权
    • Process for the preparation of cyclopropanamine
    • 制备环丙胺的方法
    • US5728873A
    • 1998-03-17
    • US663989
    • 1996-06-14
    • Wolfgang KleemissThomas Kalz
    • Wolfgang KleemissThomas Kalz
    • C07C209/56C07C211/35
    • C07C209/56C07C2101/02
    • A process for the preparation of cyclopropanamine by Hofmann degradation of cyclopropanecarboxamide, comprising the following steps: (1) suspending cyclopropanecarboxamide, either (A) in 1.1 to 4 mol of sodium hydroxide, in solution whose concentration is 10 to 50%, per mol of amide, or (B) in a sparing amount of water, (2) adding 1 to 1.5 mol of hypochlorite, per mol of amide, from a 5 to 15% strength hypochlorite solution at a temperature of 0.degree. to 20.degree. C., (3) adding 1.1 to 4 mol of sodium hydroxide, in solution whose concentration is 10 to 50%, per mol of amide, in the case where a suspension has been formed according to step (1)(B), (4) reacting the amide, hypochlorite, and sodium hydroxide for 10 to 60 minutes to form a homogeneous reaction mixture, (5) continuously passing the homogeneous reaction mixture through a tubular reactor at a temperature of 45.degree. to 260.degree. C., (6) feeding the reaction output from the tubular reactor into a distillation column and keeping it under reflux with water, wherein cyclopropanamine is distilled off.
    • 包括以下步骤:(1)将环丙烷甲酰胺(浓度为10〜50%)中的(A)悬浮于1.1〜4mol氢氧化钠中,每摩尔浓度为10〜50%的溶液中,将环丙烷甲酰胺(A)悬浮于环丙烷甲醛中, 酰胺或(B),(2)在0〜20℃的温度下,从5〜15%的强酸性次氯酸盐溶液中加入1〜1.5摩尔次氯酸盐/每摩尔酰胺, (3)在根据步骤(1)(B)形成悬浮液的情况下,在每摩尔酰胺浓度为10至50%的溶液中加入1.1至4mol氢氧化钠,(4)使 酰胺,次氯酸盐和氢氧化钠反应10至60分钟以形成均匀的反应混合物,(5)将均匀的反应混合物连续通过管式反应器,温度为45至260℃,(6) 反应从管状反应器输出到蒸馏塔中并将其保持在下面 与水回流,其中蒸馏出环丙胺。