Silver catalyst and a method for the preparation thereof
    1.
    发明授权
    Silver catalyst and a method for the preparation thereof 失效
    银催化剂及其制备方法

    公开(公告)号:US4548921A

    公开(公告)日:1985-10-22

    申请号:US476660

    申请日:1983-03-18

    摘要: A silver catalyst comprises a sinter resistant carrier covered with finelyivided particles of a metal, a metal alloy or a partially reduced metal oxide having silver deposited thereon such that the outer surface of the particles consists essentially of monometallic silver. The metals are selected from Re, Ru, Os, Rh, Ir, Pd, Pt, Pb and Bi; the metal of the alloy from Re, Ru, Os, Rh, Ir, Pd and Pt; and the oxide from tin dioxide, lead oxide and bismuth oxide. The catalyst is useful in a variety of applications, particularly in the preparation of ethylene oxide.

    摘要翻译: 银催化剂包括覆盖有细分散的金属颗粒,金属合金或部分还原的金属氧化物的烧结抗蚀载体,其上沉积有银,使得颗粒的外表面基本上由单金属银组成。 金属选自Re,Ru,Os,Rh,Ir,Pd,Pt,Pb和Bi; 来自Re,Ru,Os,Rh,Ir,Pd和Pt的合金的金属; 和二氧化锡,氧化铅和氧化铋的氧化物。 该催化剂可用于各种应用,特别是在环氧乙烷的制备中。

    Process for upgrading a paraffinic feedstock
    3.
    发明授权
    Process for upgrading a paraffinic feedstock 失效
    升级石蜡原料的方法

    公开(公告)号:US5304697A

    公开(公告)日:1994-04-19

    申请号:US43422

    申请日:1993-04-06

    CPC分类号: C07C2/58 C07C2529/70

    摘要: Process for upgrading a paraffinic feedstock which includes: a) supplying the feedstock and an olefins-containing stream at a paraffin to olefin volume ratio greater than 2 to a reactor containing a zeolite-beta catalyst; and b) removing the upgraded product; wherein the process is operated at an olefin conversion of at least 90 mol % in an external circulation reactor having an extent of external circulation of liquid reactor content expressed as ##EQU1## of greater than 2 wherein .phi./v is the volumetric flow rate of feedstock and olefins-containing stream and .phi./vc is the volumetric external circulation flow rate, and upgraded products produced by the process.

    摘要翻译: 用于升级链烷烃原料的方法,其包括:a)将原料和含烯烃的料流以大于2的链烷烃与烯烃体积比提供给含有沸石-β催化剂的反应器; 和b)取出升级后的产品; 其中所述方法在外部循环反应器中以至少90mol%的烯烃转化率进行操作,所述外循环反应器具有表示为(* CHEMICAL STRUCTURE *)大于2的液体反应器内容物的外部循环程度,其中(phi)/ v为 原料和含烯烃流的体积流量和(phi)/ vc是体积外循环流量,并且由该方法生产的升级产物。