Direct epoxidation process using a mixed catalyst system
    4.
    发明授权
    Direct epoxidation process using a mixed catalyst system 有权
    直接环氧化工艺采用混合催化剂体系

    公开(公告)号:US06498259B1

    公开(公告)日:2002-12-24

    申请号:US10046502

    申请日:2001-10-19

    IPC分类号: C07D30106

    CPC分类号: C07D301/06

    摘要: The liquid-phase epoxidation reaction of an olefin with hydrogen and oxygen in the presence of a catalyst mixture containing a titanium zeolite and a supported catalyst surprisingly produces less ring-opened products such as glycols when performed in the presence of a buffer. This is particularly surprising because a typical palladium on titanium zeolite catalyst is little effected by the presence of a buffer. Surprisingly, the use of a buffer also typically improves the activity of the process.

    摘要翻译: 在含有钛沸石和负载型催化剂的催化剂混合物存在下,烯烃与氢气和氧气的液相环氧化反应令人惊奇地在缓冲剂存在下产生较少的开环产物如二醇。 这是特别令人惊讶的,因为典型的钛钛沸石催化剂的钯不受缓冲剂的存在影响。 令人惊讶的是,缓冲液的使用通常也改善了过程的活性。

    Direct epoxidation catalyst and process
    5.
    发明申请
    Direct epoxidation catalyst and process 失效
    直接环氧化催化剂和工艺

    公开(公告)号:US20110152550A1

    公开(公告)日:2011-06-23

    申请号:US12653678

    申请日:2009-12-17

    IPC分类号: C07D301/06 B01J29/068

    摘要: A catalyst, useful for the direct epoxidation of olefins, is disclosed. The catalyst comprises palladium nanoparticles, support nanoparticles, and a titanium zeolite having a particle size of 2 microns or greater. The palladium nanoparticles are deposited on the support nanoparticles to form supported palladium nanoparticles, and the supported palladium nanoparticles are deposited on the titanium zeolite; or the supported palladium nanoparticles are deposited on a carrier having a particle size of 2 microns or greater. The invention also includes a process for producing an epoxide comprising reacting an olefin, hydrogen and oxygen in the presence of the catalyst. The catalysts are more active in epoxidation reactions, while demonstrating the same or better selectivity.

    摘要翻译: 公开了一种可用于烯烃直接环氧化的催化剂。 催化剂包括钯纳米颗粒,载体纳米颗粒和粒径为2微米或更大的钛沸石。 将钯纳米颗粒沉积在载体纳米颗粒上以形成负载的钯纳米颗粒,并将负载的钯纳米颗粒沉积在钛沸石上; 或者将负载的钯纳米颗粒沉积在粒径为2微米或更大的载体上。 本发明还包括一种生产环氧化物的方法,包括在催化剂存在下使烯烃,氢和氧反应。 催化剂在环氧化反应中更具活性,同时表现出相同或更好的选择性。

    Direct epoxidation process using a mixed catalyst system
    7.
    发明授权
    Direct epoxidation process using a mixed catalyst system 有权
    直接环氧化工艺采用混合催化剂体系

    公开(公告)号:US07470801B1

    公开(公告)日:2008-12-30

    申请号:US11977359

    申请日:2007-10-24

    申请人: Roger A. Grey

    发明人: Roger A. Grey

    IPC分类号: C07D301/06

    CPC分类号: C07D301/06 C07D301/08

    摘要: Catalyst mixtures useful for the direct epoxidation of olefins are disclosed. The catalyst mixture comprises a titanium or vanadium zeolite and a supported catalyst comprising a noble metal, bismuth, and a carrier. The invention includes a process for producing an epoxide comprising reacting an olefin, hydrogen and oxygen in the presence of the catalyst mixture. The process results in significantly reduced alkane byproduct formed by the hydrogenation of olefin.

    摘要翻译: 公开了用于烯烃的直接环氧化的催化剂混合物。 催化剂混合物包含钛或钒沸石和包含贵金属,铋和载体的载体催化剂。 本发明包括一种生产环氧化物的方法,包括在催化剂混合物存在下使烯烃,氢和氧反应。 该方法可显着减少由烯烃氢化形成的烷烃副产物。

    Propylene oxide process
    10.
    发明授权
    Propylene oxide process 失效
    环氧丙烷工艺

    公开(公告)号:US06867312B1

    公开(公告)日:2005-03-15

    申请号:US10802690

    申请日:2004-03-17

    IPC分类号: C07D301/03 C07D301/12

    CPC分类号: C07D301/12

    摘要: Propylene oxide is formed in a two step reaction wherein in a first step oxygen and hydrogen are reacted in the absence of propylene to form hydrogen peroxide and in a second step propylene is reacted with the formed hydrogen peroxide to form propylene oxide, the same solid noble metal on TS-1 catalyst being used to catalyze the reaction in each step.

    摘要翻译: 环氧丙烷以两步反应形成,其中在第一步中,氧和氢在不存在丙烯的情况下反应形成过氧化氢,第二步丙烯与形成的过氧化氢反应形成环氧丙烷,相同的固体贵金属 TS-1催化剂上的金属用于催化每个步骤中的反应。