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99 条记录 (耗时 0.038 秒)

    Structured packing for heat exchange and mass transfer
    36.
    发明授权
    Structured packing for heat exchange and mass transfer 失效
    用于热交换和传质的结构填料

    公开(公告)号：US06427985B1

    公开(公告)日：2002-08-06

    申请号：US09625486

    申请日：2000-07-25

    申请人： Gerd Kaibel ,  Manfred Stroezel ,  Achim Stammer

    发明人： Gerd Kaibel ,  Manfred Stroezel ,  Achim Stammer

    IPC分类号： B01F304

    CPC分类号： F28C3/08 ,  B01J19/32 ,  B01J2219/3221 ,  B01J2219/32213 ,  B01J2219/32227 ,  B01J2219/32258 ,  B01J2219/32272 ,  B01J2219/32408 ,  B01J2219/32466 ,  Y10S261/72

    摘要： A structured packing for heat exchange and mass transfer between a liquid and a gas in a column having at least one packing layer with a first, lower end and a second, upper end is described, the packing layer having an internal geometry which varies over its height so that by suitably setting the liquid and gas flow rates in a first, in particular lower, region of the packing layer a bubbling layer having a predominantly disperse gas phase forms in a targeted manner and simultaneously in a second, in particular upper, region of the packing layer a film flow of the liquid having a predominantly continuous gas phase forms in a targeted manner.

    摘要翻译： 描述了一种用于在具有至少一个具有第一，下端和第二上端的填料层的塔中的液体和气体之间的热交换和质量传递的规整填料，所述填料层具有内部几何形状 高度，使得通过适当地将液体和气体流速设定在填料层的第一个，特别是较低的区域中，具有主要分散气相的起泡层以目标方式形成，同时在第二特别是上部区域 的填料层，以目标的方式形成具有主要连续气相的液体的膜流。

    Preparation of citral
    38.
    发明授权
    Preparation of citral 有权
    柠檬醛的制备

    公开(公告)号：US06175044B1

    公开(公告)日：2001-01-16

    申请号：US09404548

    申请日：1999-09-24

    申请人： Jörg Therre ,  Gerd Kaibel ,  Werner Aquila ,  G{umlaut over (u)}nter Wegner ,  Hartwig Fuchs

    发明人： Jörg Therre ,  Gerd Kaibel ,  Werner Aquila ,  G{umlaut over (u)}nter Wegner ,  Hartwig Fuchs

    IPC分类号： C07C4551

    CPC分类号： C07C45/515 ,  C07C45/513 ,  C07C45/67 ,  C07C47/21

    摘要： 3,7-Dimethyl-2,6-octadien-1-al of formula I is prepared continuously by: thermally cleaving, in the presence or absence of an acid catalyst, 3-methyl-2-buten-1-al diprenyl acetal of formula II: thereby eliminating 3-methyl-2-buten-1-ol of formula III and yielding cis/trans-prenyl 3-methylbutadienyl ether of formula IV: thermally rearranging the resultant butadienyl ether of formula IV thereby yielding 2,4,4-trimethyl-3-formyl-1,5-hexadiene of formula V: subsequently rearranging intermediate (V) thereby yielding citral product of formula I, which comprises: as the reaction proceeds, continuously distilling the reaction mixture thereby continuously removing prenol, which is formed by degradation of acetal II, and the intermediates of formula IV and V and any citral product which is formed during the reaction; and thermally rearranging said intermediates of formula IV and V at a temperature of 100-200° C. in the absence or presence of said prenol to form citral product.

    摘要翻译： 通过以下方式连续制备式I的3,7-二甲基-2,6-辛二烯-1-醇：在存在或不存在酸催化剂的情况下，热裂解3-甲基-2-丁烯-1-al阮内烯 式II：由此除去式III的3-甲基-2-丁烯-1-醇，得到式IV的顺/反 - 异戊烯基3-甲基丁二烯基醚：热重新排列所得的式IV的丁二烯基醚，由此得到2,4,4 式V的 - 三甲基-3-甲酰基-1,5-己二烯：随后重新排列中间体（V），从而产生式I的柠檬醛产物，其包括：随着反应的进行，连续蒸馏反应混合物，从而连续除去前醇， 由缩醛II的降解形成，以及式IV和V的中间体以及在反应期间形成的任何柠檬醛产物; 在不存在或存在所述prenol的情况下，在100-200℃的温度下热处理所述式IV和V的中间体，以形成柠檬醛产物。

    Production of anhydrous or substantially anhydrous formic acid
    40.
    发明授权
    Production of anhydrous or substantially anhydrous formic acid 失效
    生产无水或基本无水的甲酸

    公开(公告)号：US4326073A

    公开(公告)日：1982-04-20

    申请号：US131501

    申请日：1980-03-18

    申请人： Dieter Wolf ,  Rudolf Schmidt ,  Ulrich Block ,  Hartmut Schoenmakers ,  Kaspar Bott ,  Gerd Kaibel

    发明人： Dieter Wolf ,  Rudolf Schmidt ,  Ulrich Block ,  Hartmut Schoenmakers ,  Kaspar Bott ,  Gerd Kaibel

    IPC分类号： C07C53/02 ,  C07C27/02 ,  C07C51/00 ,  C07C51/09 ,  C07C51/44 ,  C07C51/48 ,  C07C67/00

    CPC分类号： C07C51/09 ,  C07C51/48

    摘要： Anhydrous or substantially anhydrous formic acid is obtained by hydrolysis of methyl formate, in a process wherein(a) methyl formate is hydrolyzed,(b) the methanol and excess methyl formate are distilled from the hydrolysis mixture obtained,(c) the bottom product of distillation (b), consisting of formic acid and water, is extracted, in a liquid-liquid extraction, with an extractant which in the main takes up the formic acid,(d) the resulting extract phase, consisting of formic acid, the extractant and a part of the water, is subjected to distillation,(e) the top product obtained from this distillation and consisting of all or part of the water introduced into the distillation, and part of the formic acid, is recycled, as vapor, into the lower part of the distillation column of stage (b),(f) the bottom product of distillation stage (d), consisting of the extractant, with or without part of the water, and the greater part of the formic acid, is separated by distillation into anhydrous or substantially anhydrous formic acid and the extractant, and(g) the extractant leaving stage (f) is recycled to the process.

    摘要翻译： 在（a）甲酸甲酯水解的过程中，（甲）甲醇和过量的甲酸甲酯从得到的水解混合物中蒸馏得到，（c）甲酸叔丁酯的底部产物 蒸馏（b）由甲酸和水组成，在液 - 液萃取中用主要萃取甲酸的萃取剂萃取，（d）所得提取相由甲酸，萃取剂 和一部分水进行蒸馏，（e）由该蒸馏获得的顶部产物，并且由引入蒸馏的全部或部分水和部分甲酸作为蒸气循环进入 阶段（b）的蒸馏塔的下部，（f）蒸馏阶段（d）的底部产物，由萃取剂组成，有或没有部分水和大部分甲酸分离 通过蒸馏成无水 粗粉或基本上无水的甲酸和萃取剂，和（g）离开阶段（f）的萃取剂再循环到该方法中。