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31 条记录 (耗时 0.016 秒)

    Process and apparatus for preparing heterogeneous catalysts
    1.
    发明授权
    Process and apparatus for preparing heterogeneous catalysts 失效
    制备非均相催化剂的方法和装置

    公开(公告)号：US06534431B1

    公开(公告)日：2003-03-18

    申请号：US08881254

    申请日：1997-06-24

    申请人： Tuomo Suntola ,  Eeva-Liisa Lakomaa ,  Hilkka Knuuttila ,  Pekka Knuuttila ,  Outi Krause ,  Sven Lindfors

    发明人： Tuomo Suntola ,  Eeva-Liisa Lakomaa ,  Hilkka Knuuttila ,  Pekka Knuuttila ,  Outi Krause ,  Sven Lindfors

    IPC分类号： C23L1608

    CPC分类号： B01J37/0238 ,  B01J23/26 ,  B01J23/36 ,  B01J29/061

    摘要： The invention relates to a process and to an apparatus for preparing a heterogeneous catalyst having at least one catalytically active species bound to the surface of a support material. According to the process, the surface of the support is first pretreated. A catalyst reagent containing the catalytically active species or its precursor is vaporized and the vapor is routed into a reaction chamber where it is brought to interact with the support material. The catalyst reagent not bound to the support is withdrawn from the reaction chamber in gaseous form. If necessary, the species bound to the support is posttreated in order to convert it into a catalytically active form. According to the invention, the amount of catalyst reagent brought into the reaction chamber is at least equal to, preferably in excess of the number of available binding sites on the surface. The temperature of the support of kept higher than the condensation temperature of the vapor and at the same time at a sufficiently high level to attain the thermal activation energy needed for forming bonds between the active species and the support. By binding the catalytically active species in this way to the support it is possible to provide a heterogeneous catalyst having a high activity even at small amounts of the active species.

    摘要翻译： 本发明涉及一种制备具有结合到载体材料表面的至少一种催化活性物质的多相催化剂的方法和装置。 根据该方法，首先预处理载体的表面。 含有催化活性物质或其前体的催化剂试剂被蒸发，并且蒸气被引导到反应室中，在该反应室中使其与载体材料相互作用。 未与载体结合的催化剂试剂以气态形式从反应室中排出。 如果需要，结合到载体上的物质进行后处理，以将其转化为催化活性形式。 根据本发明，进入反应室的催化剂试剂的量至少等于，优选地超过表面上可用结合位点的数量。 载体的温度保持高于蒸气的冷凝温度，并且同时具有足够高的水平以获得在活性物质和载体之间形成键所需的热活化能。 通过将催化活性物质以这种方式结合到载体上，即使在少量的活性物质中也可以提供具有高活性的多相催化剂。

    Catalyst for metathetic reactions of hydrocarbons and method for forming the catalyst
    2.
    发明授权
    Catalyst for metathetic reactions of hydrocarbons and method for forming the catalyst 失效
    碳氢化合物反应催化剂及催化剂形成方法

    公开(公告)号：US5183796A

    公开(公告)日：1993-02-02

    申请号：US641904

    申请日：1991-01-16

    申请人： Pekka Knuuttila ,  Eeva-Liisa Lakomaa

    发明人： Pekka Knuuttila ,  Eeva-Liisa Lakomaa

    IPC分类号： B01J23/36 ,  B01J37/02 ,  C07C6/04 ,  C07C11/04 ,  C07C11/08

    CPC分类号： B01J23/36 ,  B01J37/0238 ,  C07C6/04 ,  C07C2521/04 ,  C07C2523/36

    摘要： The present invention concerns a heterogenic catalyst suited to the metathesis reactions of hydrocarbons in particular. Such a catalyst includes an inorganic oxide support, typically consisting of .gamma.-alumina, having rhenium oxide absorbed onto its surface. The catalyst in accordance with the invention is prepared by vapourizing a precursor of rhenium, preferably rhenium heptoxide, preferably at a temperature of at least 160.degree. C., and routing the vapour into a reaction chamber where they are brought to interaction with the support material. The temperature of the support material is kept above the condensation temperature of the vapour and simultaneously sufficiently high so as to attain the thermal activation energy level necessary for the generation of bonds between the rhenium oxide and the support material. According to the invention, the process is carried out preferredly within a temperature range of approx. 160.degree. . . . 500.degree. C. The rhenium oxide precursor is introduced in vapour phase in an amount, which is at least equal to or, preferably, in excess of the number of available binding sites on the support material surface. The activity of a catalyst even with a very low content of catalytic metal species is as high as the activity of a catalyst of appreciably higher content of rhenium that has been prepared by the methods of conventional technology.