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    Process for preparing dialkyl vinylphosphonates
    1.
    发明授权
    Process for preparing dialkyl vinylphosphonates 失效
    制备二烷基乙烯基膦酸酯的方法

    公开(公告)号：US5475128A

    公开(公告)日：1995-12-12

    申请号：US353676

    申请日：1994-12-12

    申请人： Gunter Roscher ,  Wolf-Dietmar Kaufmann ,  Bernd Laugwitz

    发明人： Gunter Roscher ,  Wolf-Dietmar Kaufmann ,  Bernd Laugwitz

    IPC分类号： B01D1/22 ,  B01D3/14 ,  C07F9/40 ,  C07F9/38

    CPC分类号： C07F9/4015 ,  B01D1/225 ,  B01D3/146 ,  B01D3/148

    摘要： Process for the continuous preparation of dialkyl vinylphosphonates using catalysts at temperatures of from 150.degree. to 270.degree. C. by dissociation of dialkyl acetoxyethanephosphonates at a pressure of from 5 to 500 mbar in contact with a liquid, catalytically active medium while drawing off the dialkyl vinylphosphonates formed and other volatile reaction products as vapors, by conveying the liquid medium in forced circulation via an evaporator while feeding in fresh dialkyl acetoxyethanephosphonate, if desired admixed with catalyst, corresponding to the distillation of dialkyl vinylphosphonates and other volatile compounds, and drawing off non-volatile material formed as byproduct from the liquid circuit to maintain constant conditions.

    摘要翻译： 使用催化剂在150-270℃的温度下连续制备二烷基乙烯基膦酸酯的方法，通过在5至500毫巴的压力下与液体催化活性介质接触而解离二烷基乙烯基膦酸二烷基酯 形成的和其它挥发性反应产物作为蒸气，通过蒸发器输送液体介质强制循环，同时在新鲜的二烷基乙酰氧基乙烷膦酸盐中进料，如果需要，与催化剂混合，对应于乙烯基膦酸二烷基酯和其它挥发性化合物的蒸馏， 挥发性物质作为液体回路的副产物形成，以保持恒定的条件。

    Process for the preparation of the non-toxic salts of 6-methyl-3,4-dihydro-1,2,3-oxathiazin-4-one 2,2-dioxide and arrangement for carrying out this process
    2.
    发明授权
    Process for the preparation of the non-toxic salts of 6-methyl-3,4-dihydro-1,2,3-oxathiazin-4-one 2,2-dioxide and arrangement for carrying out this process 失效
    制备6-甲基-3,4-二氢-1,2,3-氧杂噻嗪-4-酮2,2-二氧化物的无毒盐的方法和用于进行该方法的装置

    公开(公告)号：US5744010A

    公开(公告)日：1998-04-28

    申请号：US302807

    申请日：1995-06-19

    申请人： Gunter Roscher ,  Heinz Litterer ,  Axel Engelmann ,  Wolf-Dietmar Kaufmann ,  Bernd Laugwitz ,  Hans-Dietmar Schnabel

    发明人： Gunter Roscher ,  Heinz Litterer ,  Axel Engelmann ,  Wolf-Dietmar Kaufmann ,  Bernd Laugwitz ,  Hans-Dietmar Schnabel

    IPC分类号： C07D291/06 ,  B01D11/00 ,  C07D291/00

    CPC分类号： C07D291/06 ,  Y10S203/17

    摘要： The invention relates to a process for the preparation of acesulfam salts by reaction of salts of amidosulfonic acid with diketene to give a salt of acetoacetamidosulfonic acid (I), ring closure by the action of at least about an equivalent amount of SO.sub.3, at least this ring closure reaction being carried out in the presence of a halogenated, aliphatic hydrocarbon as an inert solvent, treatment of the cyclization product with water and conversion of the resulting acesulfam-H (II) into the form of a non-toxic salt, which comprises, in the work-up by distillation of the resulting crude solvent, after removal of water and low-boilers and recovery of solvent sufficiently pure for reuse in the preparation of compounds (I) and/or (II), directly returning :he remaining, solvent-containing distillation residue, without further purification, into the system downstream of the reaction vessel for carrying out the ring closure reaction.

    摘要翻译： PCT No.PCT / EP93 / 00606 Sec。 371日期：1995年6月19日 102（e）日期1995年6月19日PCT 1993年3月16日PCT公布。 出版物WO93 / 19055 日期1993年9月30日本发明涉及通过酰胺磺酸与双烯酮的盐反应制备乙酰磺胺盐的方法，得到乙酰乙酰氨基磺酸（I）的盐，通过至少约等量的 SO 3，至少该闭环反应在卤化的脂族烃作为惰性溶剂的存在下进行，环化产物用水处理并将所得的乙酰胺-H（II）转化为非 - 其中包括在除去水和低沸点剂后，通过蒸馏所得的粗溶剂进行后处理和回收足够纯的用于制备化合物（I）和/或（II）的溶剂） 直接返回：将剩余的含溶剂的蒸馏残余物不经进一步纯化进入反应容器下游的系统进行闭环反应。