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    Production of anhydrous or substantially anhydrous formic acid
    1.
    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。

    Method for the production of esters
    2.
    发明授权
    Method for the production of esters 有权
    酯的制备方法

    公开(公告)号：US06720447B1

    公开(公告)日：2004-04-13

    申请号：US09889401

    申请日：2001-07-17

    申请人： Klaus Ditrich ,  Ulrich Block

    发明人： Klaus Ditrich ,  Ulrich Block

    IPC分类号： C07C6966

    CPC分类号： C07C67/08 ,  C07C69/708

    摘要： The present invention relates to a novel process for the preparation of esters of the general formula I from compounds of the general formula II contained in aqueous solutions which comprises a) extracting the compounds of the general formula II directly or after liberation from their salts in the presence of a C1-C8-alcohol and a water-immiscible solvent and b) then esterifying with the C1-C8-alcohol in the presence of a catalyst and of an entraining agent under the conditions of an azeotropic distillation, where the process steps (a) and (b) can be carried out separately in terms of time and space or else in a successive continuous or batchwise sequence and where the variables and substituents in the formulae I and II have the following meanings: R1=F, Cl, —OH, —OC1-C10-alkyl, R2=H, C1-C10-alkyl; R3=C1-C8-alkyl, Q=—OH, —O−K+, where K+ is an alkali metal cation or alkaline earth metal cation, n=0, 1 or 2.

    摘要翻译： 本发明涉及制备通式II所示的通式II的化合物的新方法，其中包含在水溶液中的通式II的化合物，它包括：a）直接或者在其存在下直接从其盐中释放出通式II的化合物 C1-C8-醇和一种与水不混溶的溶剂，b）然后在共沸蒸馏条件下，在催化剂和夹带剂的存在下，用C1-C8-醇酯化，其中工艺步骤（a）和（ b）可以在时间和空间方面分开进行，或者以连续的或间歇的顺序进行，其中式I和II中的变量和取代基具有以下含义：R 1 = F，Cl，-OH ，-OC 1 -C 10 - 烷基，R 2 = H，C 1 -C 10 - 烷基; R 3 = C 1 -C 8烷基，Q = -OH，-OK 2，其中K < +>是碱金属阳离子或碱土金属阳离子，n = 0,1或2。

    Increasing the temperature of the exit gas from the exit gas washer in the preparation of phthalic anhydride
    4.
    发明授权
    Increasing the temperature of the exit gas from the exit gas washer in the preparation of phthalic anhydride 失效
    在邻苯二甲酸酐的制备中提高出口气体洗涤器的出口气体的温度

    公开(公告)号：US4662898A

    公开(公告)日：1987-05-05

    申请号：US775346

    申请日：1985-09-11

    申请人： Ulrich Block

    发明人： Ulrich Block

    IPC分类号： C07D307/89 ,  C07C51/573 ,  B01D47/00

    CPC分类号： C07C51/573

    摘要： The temperature of the exit gas from the gas washer in the preparation of phthalic anhydride by catalytic oxidation of naphthalene or o-xylene with air is increased by a method in which flue gas from the combustion furnace for residues is mixed with the exit gas before the latter emerges into the atmosphere.

    摘要翻译： 通过萘和邻二甲苯与空气的催化氧化制备邻苯二甲酸酐的气体洗涤器的出口气体的温度通过以下方法提高：将来自残留物的燃烧炉的烟道气与出口气体混合 后者涌入大气层。