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    • 24. 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。
    • 30. 发明授权
    • Dividing wall column
    • 分隔墙柱
    • US06958111B2
    • 2005-10-25
    • US09847299
    • 2001-05-03
    • Harald RustGerd Kaibel
    • Harald RustGerd Kaibel
    • B01D3/14B01D3/16
    • B01D3/141B01D3/146
    • In a dividing wall column comprising as segments a) an upper column region (6), b) an inflow section (7), c) an offtake section (8) and d) a lower column region (9), the inflow section b) (7) and the offtake section c) (8) are separated from one another laterally by a dividing wall (10) fixed in the column and the dividing wall (10) is located between the upper column region a) (6) and the lower column region d) (9). The present invention provides for the dividing wall (10) to be constructed at least partly of an elastic material, the dividing wall (10) to have a slightly overdimensional width and the dividing wall (10) to be fixed in the column by the dividing wall exercising an elastic recovery force on the interior wall of the column. The dividing wall can easily be installed in, in particular, relatively small columns.
    • 在分隔壁柱中,包括a)上列区域(6),b)流入部分(7),c)脱出部分(8)和d)下部列区域(9),流入部分b )(7)和收拢部分c)(8)通过固定在塔中的分隔壁(10)横向隔开,分隔壁(10)位于上列区域a)(6)和 下列区域d)(9)。 本发明提供了至少部分地由弹性材料构成的分隔壁(10),该分隔壁(10)具有稍微过度的宽度,并且该分隔壁(10)通过分开固定在该塔中 墙壁在柱的内壁上弹性恢复力。 分隔壁可以容易地安装在特别是相对较小的柱中。