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4 条记录 (耗时 0.018 秒)

    Continuous preparation of furmamide
    1.
    发明授权
    Continuous preparation of furmamide 失效
    连续制备呋喃胺

    公开(公告)号：US4659866A

    公开(公告)日：1987-04-21

    申请号：US347578

    申请日：1982-02-10

    申请人： Kaspar Bott ,  Gerd Kaibel ,  Herwig Hoffmann ,  Rudolf Irnich ,  Otto Kratzer

    发明人： Kaspar Bott ,  Gerd Kaibel ,  Herwig Hoffmann ,  Rudolf Irnich ,  Otto Kratzer

    IPC分类号： C07C231/02 ,  C07C20060101 ,  C07C67/00 ,  C07C231/00 ,  C07C233/03 ,  C07C102/06

    CPC分类号： C07C231/02

    摘要： 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.

    摘要翻译： 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。

    Production of anhydrous or substantially anhydrous formic acid
    2.
    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：US4262140A

    公开(公告)日：1981-04-14

    申请号：US99760

    申请日：1979-12-03

    申请人： Kaspar Bott ,  Gerd Kaibel ,  Herwig Hoffmann ,  Otto Kratzer ,  Rudolf Irnich

    发明人： Kaspar Bott ,  Gerd Kaibel ,  Herwig Hoffmann ,  Otto Kratzer ,  Rudolf Irnich

    IPC分类号： C07C53/02 ,  C07C51/00 ,  C07C51/09 ,  C07C51/44 ,  C07C51/48 ,  C07C67/00 ,  B01D3/34

    CPC分类号： C07C51/44 ,  C07C51/09 ,  C07C51/48

    摘要： 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.

    摘要翻译： 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。

    Method for producing acid phthalic anhydride and an appropriate shell catalyst containing titanium-vanadium-cesium
    3.
    发明授权
    Method for producing acid phthalic anhydride and an appropriate shell catalyst containing titanium-vanadium-cesium 失效
    酸性邻苯二甲酸酐的制备方法和含有钛 - 钒 - 铯的合适的壳催化剂

    公开(公告)号：US06458970B1

    公开(公告)日：2002-10-01

    申请号：US09380214

    申请日：1999-08-26

    申请人： Gerhard Hefele ,  Otto Kratzer ,  Walter Scheidmeir ,  Bernhard Ulrich

    发明人： Gerhard Hefele ,  Otto Kratzer ,  Walter Scheidmeir ,  Bernhard Ulrich

    IPC分类号： C07D30789

    CPC分类号： C07C51/265 ,  B01J23/22 ,  B01J37/0221 ,  C07C51/313 ,  C07C63/16

    摘要： In a process for preparing phthalic anhydride by catalytic gas-phase oxidation of o-xylene or naphthalene or o-xylene/naphthalene mixtures with a gas comprising molecular oxygen over a coated catalyst comprising an inert, nonporous support material on which a catalytically active composition comprising titanium dioxide and vanadium pentoxide is applied in layer form, a catalyst whose catalytically active composition comprises from 3 to 6% by weight of vanadium pentoxide, calculated as V2O5, from 0.3 to 0.5% by weight of a cesium compound, calculated as Cs, and the remainder to 100% by weight of titanium dioxide in the anatase modification is used in the presence or absence of a coated catalyst, differing therefrom, for the catalytic gas-phase oxidation of o-xylene or naphthalene or o-xylene/naphthalene mixtures and, in the presence of such a second catalyst, the latter is used in a combined bed with the catalyst of the above composition in the reactor.

    摘要翻译： 在通过在包含分子氧的气体在包含惰性无孔载体材料的涂覆的催化剂上的邻二甲苯或萘或邻二甲苯/萘混合物的催化气相氧化制备邻苯二甲酸酐的方法中，其中催化活性组合物包含 二氧化钛和五氧化二钒以层的形式施用，催化剂的催化活性组合物包含3至6重量％的以五氧化二钒计算的五氧化二钒，0.3至0.5重量％的以Cs计算的铯化合物，以及 在锐钛矿改性中剩余至100重量％的二氧化钛的存在与不同之处在于用于邻二甲苯或萘或邻二甲苯/萘混合物的催化气相氧化的涂覆催化剂的存在或不存在，以及 在这种第二催化剂的存在下，后者与反应器中与上述组成的催化剂在组合床中使用。