PROCESS FOR SYNTHESIS OF MOLYBDENUM SULFIDE-BASED CATALYSTS
    3.
    发明申请
    PROCESS FOR SYNTHESIS OF MOLYBDENUM SULFIDE-BASED CATALYSTS 有权
    用于合成基于硫化钼的催化剂的方法

    公开(公告)号:US20150139890A1

    公开(公告)日:2015-05-21

    申请号:US14008774

    申请日:2011-04-01

    摘要: A process for preparing a molybdenum sulfide-based catalyst comprises drying a precipitated molybdenum sulfide-based catalyst precursor, for example, a wet filter cake, such that a particulate catalyst precursor, containing from 12 to 15 percent by weight water, is formed. The particulate catalyst precursor is desirably in the form of free-flowing particles. The particulate catalyst precursor is then auto-reduced. A rotary furnace that subjects the catalyst precursor to at least two zones having distinct temperatures may be conveniently used for drying, auto-reduction, or both. The staged drying and auto-reduction steps reduce the tendency of the precursor to self-heat, which is undesirable because it reduces both the activity and selectivity of the final catalyst.

    摘要翻译: 制备硫化钼基催化剂的方法包括干燥沉淀的硫化钼基催化剂前体,例如湿滤饼,使得形成含有12至15重量%水的颗粒催化剂前体。 颗粒状催化剂前体理想地是自由流动的颗粒的形式。 然后将颗粒状催化剂前体自动还原。 使催化剂前体经受至少两个具有不同温度的区域的旋转炉可以方便地用于干燥,自动还原或两者。 分阶段的干燥和自动还原步骤降低了前体自热的倾向,这是不希望的,因为它降低了最终催化剂的活性和选择性。

    CATALYST COMPOSITION FOR DIRECT CONVERSION OF ETHANOL TO PROPYLENE
    5.
    发明申请
    CATALYST COMPOSITION FOR DIRECT CONVERSION OF ETHANOL TO PROPYLENE 有权
    乙醇直接转化成丙烯的催化剂组合物

    公开(公告)号:US20120330080A1

    公开(公告)日:2012-12-27

    申请号:US13576431

    申请日:2011-03-07

    IPC分类号: C07C1/20 B01J29/48

    摘要: A process to prepare propylene showing desirably increased selectivity comprises contacting, at an elevated temperature, ethanol and a rhenium oxide-modified ZSM-5 zeolite catalyst, under conditions suitable to form propylene. The rhenium oxide-modified ZSM-5 zeolite catalyst may be prepared by impregnating, in an aqueous or organic medium, a ZSM-5 zeolite with a rhenium source, under conditions suitable to form a catalyst precursor, and calcining the catalyst precursor under conditions suitable to form a rhenium oxide-modified ZSM-5 zeolite catalyst.

    摘要翻译: 制备丙烯的方法显示出期望的增加的选择性包括在适于形成丙烯的条件下,在高温下使乙醇和氧化铼改性的ZSM-5沸石催化剂接触。 氧化铼氧化物改性的ZSM-5沸石催化剂可以通过在适合于形成催化剂前体的条件下在含水或有机介质中浸渍具有铼源的ZSM-5沸石并在合适的条件下煅烧催化剂前体来制备 以形成氧化铼氧化物改性的ZSM-5沸石催化剂。