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54 条记录 (耗时 0.021 秒)

    Method for producing epoxides through olefin oxidation with air or oxygen
    9.
    发明授权
    Method for producing epoxides through olefin oxidation with air or oxygen 失效
    用空气或氧气通过烯烃氧化制备环氧化物的方法

    公开(公告)号：US06326502B1

    公开(公告)日：2001-12-04

    申请号：US09462523

    申请日：2000-01-07

    申请人： Rolf Peter Schulz ,  Uwe Dingerdissen ,  Wolfgang Anton Herrmann ,  Gerhard Lobmaier

    发明人： Rolf Peter Schulz ,  Uwe Dingerdissen ,  Wolfgang Anton Herrmann ,  Gerhard Lobmaier

    IPC分类号： C07D30106

    CPC分类号： C07D301/06 ,  C07D303/04

    摘要： The present invention provides a process for the epoxidation of alkenes of the formula (1) where R1, R2, R3 and R4 are, independently of one another, hydrogen, C1-C20-alkyl, C1-C12-alkoxy, C6-C10-aryl, —CHOH—CH3, —CH—NH2—CH3 or carboxy, using air or oxygen over a catalyst comprising compounds of the formula (2) MoxOy(L)z  (2) where x is 1, 2 or 3, y is an integer from 0 to 2x+1, z is an integer from 1 to 2x, where the ligand L is a compound of the formula (3) or (4) where X is a nitrogen, oxygen or sulfur atom, Y is hydrogen, C1-C8-alkyl, C1-C8-alkoxy, F, Cl, Br, I, COOCH3, C6-C14-aryl or C3-C8-cycloalkyl, R7 and R8 form a ring containing from 4 to 8 carbon atoms onto which one or two aromatic rings may be fused, R5 and R6 are hydrogen, branched or straight-chain C1-C12-alkyl or branched or straight-chain C1-C12-haloalkyl which are substituents on the ring formed by R7 and R8 and/or the rings fused onto this ring, or the ligand L is a compound of the formula (5), (6) or (7) where R is hydrogen, C1-C8-alkyl, C1-C8-haloalkyl, C1-C8-alkoxy, COOCH3, C6-C14-aryl or C3-C8-cycloalkyl and n is 1 or 2 and m is from 1 to 6, wherein the reaction is carried out in a pressure vessel which is completely lined with an inert material.

    摘要翻译： 本发明提供了式（1）的烯烃的环氧化方法，其中R 1，R 2，R 3和R 4彼此独立地为氢，C 1 -C 20 - 烷基，C 1 -C 12 - 烷氧基，C 6 -C 10 - 芳基，-CHOH-CH 3，-CH-NH 2 -CH 3或羧基，使用空气或氧气在包含式（2）化合物的催化剂上，其中x为1,2或3，y为0至2×+ 1的整数， z是1至2的整数，其中配体L是式（3）或（4）的化合物，其中X是氮，氧或硫原子，Y是氢，C1-C8-烷基，C1-C8-烷基， 烷氧基，F，Cl，Br，I，COOCH 3，C 6 -C 14 - 芳基或C 3 -C 8 - 环烷基，R 7和R 8形成含有4至8个碳原子的环，一个或两个芳环可以被稠合，R5和 R6是在由R7和R8形成的环和/或稠合在该环上的环上的取代基的氢，支链或直链C 1 -C 12烷基或支链或直链C 1 -C 12 - 卤代烷基，或配体L 是式（5），（6）或（7）的化合物，其中R是氢，C1-C8-烷基，C1-C8 卤代烷基，C 1 -C 8 - 烷氧基，COOCH 3，C 6 -C 14 - 芳基或C 3 -C 8 - 环烷基，n为1或2，m为1至6，其中反应在完全衬里的压力容器中进行 用惰性材料。

    Catalyst, process for its production and its use for preparing vinyl acetate
    10.
    发明授权
    Catalyst, process for its production and its use for preparing vinyl acetate 失效

    公开(公告)号：US6069268A

    公开(公告)日：2000-05-30

    申请号：US89627

    申请日：1998-06-03

    申请人： Alfred Hagemeyer ,  Uwe Dingerdissen ,  Klaus Kuhlein ,  Johannes Heitz ,  Dieter Bauerle

    发明人： Alfred Hagemeyer ,  Uwe Dingerdissen ,  Klaus Kuhlein ,  Johannes Heitz ,  Dieter Bauerle

    摘要： The invention relates to a process for producing supported shell catalysts comprising noble metals by UV photoreduction of noble metal salt precursors fixed to a support. For this purpose, the shaped supported body is impregnated with suitable noble metal salts which are then reduced to the metals in a zone close to the surface by means of UV radiation, preferably in the absence of a chemical reducing agent. The metal salts in the interior of the pellets which have not been irradiated and therefore have not been reduced are extracted using a solvent.The noble metal shell catalysts produced in this way can be used for many heterogeneously catalyzed reactions such as hydrogenations and oxidations.According to the invention, Pd/Au shell catalysts on porous ceramic supports, e.g. SiO.sub.2 shaped bodies, produced by this process can be used in the synthesis of vinyl acetate.