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    • 21. 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。
    • 30. 发明授权
    • Continuous preparation of acetic acid esters
    • 连续制备乙酸酯
    • US4370491A
    • 1983-01-25
    • US263470
    • 1981-05-14
    • Kaspar BottGerd KaibelHerwig HoffmannRudolf IrnichEberhard Schaefer
    • Kaspar BottGerd KaibelHerwig HoffmannRudolf IrnichEberhard Schaefer
    • C07C67/03B01D3/36C07C67/02C07C69/14C07C67/06
    • C07C67/03Y10S203/06
    • A process for the preparation of acetic acid esters CH.sub.3 --CO--O--R.sup.1 (I, R.sup.1 =an organic radical other than methyl and ethyl) by alkali-catalyzed trans-esterification of an acetic acid ester CH.sub.3 --CO--O--R.sup.2 (II, R.sup.2 =methyl or ethyl) with an alcohol R.sup.1 --OH (III), accompanied by elimination of the alcohol R.sup.2 --OH (IV), wherein(a) the trans-esterification reaction is carried out in the middle section K.sub.M of a distillation column K, the alcohol III being fed as liquid into the upper zone and the ester II into the lower zone of K.sub.M,(b) the alkaline catalyst is introduced into the upper part K.sub.U of K,(c) the alcohol IV, or a mixture of IV and the ester II, is taken off the top of the column,(d) the mixture obtained from (c) (unless the alcohol IV alone is obtained) is separated in the column section K.sub.U or in a stripper column K.sub.S into IV and the azeotrope of II and IV, and the latter is recycled to the lower zone of K.sub.M,(e) the ester I is taken as vapor or liquid from the lower zone of the lower section K.sub.L of K and(f) the catalyst is either removed, or recycled to K.sub.U, in a conventional manner.
    • 通过乙酸酯CH3-CO-O-R2的碱催化反式酯化制备乙酸酯CH 3 -CO-O-R 1(I,R 1 =甲基和乙基以外的有机基)的方法 II,R 2 =甲基或乙基)与醇R 1 -OH(III)反应,同时除去醇R 2 -OH(Ⅳ),其中(a)酯交换反应在 蒸馏塔K,醇III作为液体进料到上部区域,酯II进入KM的下部区域,(b)将碱性催化剂引入K的上部KU,(c)醇IV,或 将IV和酯II的混合物从柱顶部取出,(d)从(c)获得的混合物(除非单独获得醇IV)在柱部分KU或汽提塔KS中分离 进入IV和II和IV的共沸物,后者再循环到KM的下部区域,(e)将酯I作为蒸汽或液体从下部KL的下部区域中取出 的K和(f)催化剂以常规方式被去除或再循环至KU。