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    • 2. 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。
    • 9. 发明授权
    • Production of anhydrous or substantially anhydrous formic acid
    • 生产无水或基本无水的甲酸
    • US4262140A
    • 1981-04-14
    • US99760
    • 1979-12-03
    • Kaspar BottGerd KaibelHerwig HoffmannOtto KratzerRudolf Irnich
    • Kaspar BottGerd KaibelHerwig HoffmannOtto KratzerRudolf Irnich
    • C07C53/02C07C51/00C07C51/09C07C51/44C07C51/48C07C67/00B01D3/34
    • C07C51/44C07C51/09C07C51/48
    • A process for the production of anhydrous or substantially anhydrous formic acid by hydrolysis of methyl formate which is carried out in a column having an upper fractionating section, a middle hydrolysis section and a lower extraction section and in which(a) the hydrolysis is carried out in the middle section of the columm, with water and methyl formate in countercurrent,(b) the resulting formic acid is extracted, in the lower section of the column, by means of a carboxylic acid amide which is fed into the lower end of the middle section of the column,(c) the extract phase, consisting in the main of formic acid and the carboxylic acid amide, is distillatively dehydrated, or substantially dehydrated, in the lower section of the column,(d) the methanol and uncovered methyl formate are removed by fractional distillation in the upper section of the column and(e) the pure formic acid or concentrated aqueous formic acid is distilled from the anhydrous or substantially anhydrous extract phase in a second column, leaving the carboxylic acid amide.
    • 一种通过水解甲酸甲酯生产无水或基本上无水的甲酸的方法,该甲酸甲酯在具有上部分馏段,中间水解段和下部萃取段的塔中进行,其中(a)进行水解 在水的中间部分,与水和甲酸甲酯逆流,(b)所得甲酸在柱的下部通过羧酸酰胺萃取,该羧酸酰胺进料到 塔的中间部分,(c)主要由甲酸和羧酸酰胺组成的提取相在塔的下部进行蒸馏脱水或基本上脱水,(d)甲醇和未被覆盖的甲基 甲酸盐在塔的上部通过分馏除去,(e)从无水或基本上无水的提取物中蒸馏出纯甲酸或浓缩的甲酸水溶液 相在第二塔中,留下羧酸酰胺。