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    • 8. 发明授权
    • Continuous preparation of furmamide
    • 连续制备呋喃胺
    • US4659866A
    • 1987-04-21
    • US347578
    • 1982-02-10
    • Kaspar BottGerd KaibelHerwig HoffmannRudolf IrnichOtto Kratzer
    • Kaspar BottGerd KaibelHerwig HoffmannRudolf IrnichOtto Kratzer
    • C07C231/02C07C20060101C07C67/00C07C231/00C07C233/03C07C102/06
    • C07C231/02
    • Formamide is prepared continuously from methyl formate and ammonia, pure methanol being recovered, by a process wherein(a) the reaction of methyl formate and ammonia is carried out predominantly in the liquid phase in the upper region of a reaction column R having a total of from 15 to 30 theoretical plates,(b) the methanol formed in this reaction is removed, together with small amounts of formamide, from the column or the evaporator in vaporus form at the level of plates 1-5 (counted from the bottom),(c) the formamide is removed from this methanol/formamide mixture, together with small amounts of methanol, in a distillation column D1 and recycled to R, and(d) the small amounts of methanol contained in the bottom product from R, which substantially consists of formamide and in this column should be at from 110.degree. to 130.degree. C., are separated off in a distillation column D2.
    • 甲酸甲酯由甲酸甲酯和氨,回收的纯甲醇连续制备,其中(a)甲酸甲酯和氨的反应主要在反应塔R的上部区域的液相中进行,其总共具有 从15到30个理论塔板,(b)将该反应中形成的甲醇与少量甲酰胺一起从塔或蒸发器以蒸汽形式在板1-5的水平(从底部计数)中除去, (c)将甲酰胺与蒸馏塔D1中的少量甲醇一起从该甲醇/甲酰胺混合物中除去并再循环至R,和(d)从R中的底部产物中含有的少量甲醇,其基本上 由甲酰胺组成,该柱应在110℃至130℃,在蒸馏塔D2中分离。