Method for making a highly selective ethylene oxide catalyst
    92.
    发明授权
    Method for making a highly selective ethylene oxide catalyst 有权
    制备高选择性环氧乙烷催化剂的方法

    公开(公告)号:US08883675B2

    公开(公告)日:2014-11-11

    申请号:US13109668

    申请日:2011-05-17

    摘要: A process for the preparation of a catalyst useful for the vapor phase production of ethylene oxide from ethylene and oxygen comprising providing a catalyst precursor comprising an inert support having a catalytically effective amount of a silver containing compound, a promoting amount of an alkali metal containing compound, and a promoting amount of a transition metal containing compound disposed thereon; calcining the catalyst precursor to convert the silver in the silver containing compound to metallic silver by heating the catalyst precursor to form a catalyst; and curing the catalyst in an inert gas atmosphere at temperatures of about 250° C. to about 600° C. for a period of about 1 hour to 200 hours.

    摘要翻译: 一种用于制备用于从乙烯和氧气生产环氧乙烷的催化剂的方法,包括提供催化剂前体,其包含具有催化有效量的含银化合物的惰性载体,促进量的含碱金属的化合物 ,和其上设置有过渡金属的化合物的促进量; 煅烧催化剂前体,通过加热催化剂前体以形成催化剂,将含银化合物中的银转化成金属银; 并在约250℃至约600℃的温度下在惰性气体气氛中固化催化剂约1小时至200小时。

    Exhaust gas purification catalyst and exhaust gas purification apparatus using the exhaust gas purification catalyst
    96.
    发明授权
    Exhaust gas purification catalyst and exhaust gas purification apparatus using the exhaust gas purification catalyst 有权
    废气净化催化剂和排气净化装置采用废气净化催化剂

    公开(公告)号:US08544261B2

    公开(公告)日:2013-10-01

    申请号:US12674379

    申请日:2008-08-05

    摘要: This invention provides an exhaust gas purification catalyst, which can burn PM (particulate matter) at a temperature below the temperature required in the prior art technique and can realize a high PM combustion rate at elevated temperatures, and an exhaust gas purification apparatus using the exhaust gas purification catalyst. The exhaust gas purification catalyst comprises a composite oxide having oxygen release properties and Ag and a noble metal co-supported on the composite oxide. The exhaust gas purification catalyst and an exhaust gas purification apparatus (1) using the exhaust gas purification catalyst can increase the PM combustion rate at elevated temperatures and, at the same time, can burn PM at a temperature below the temperature required in the prior art technique. Further, fuel consumption loss caused by forced regeneration, EM deterioration, and catalyst deterioration can be suppressed, and, thus, the load on automobiles can be reduced.

    摘要翻译: 本发明提供一种废气净化催化剂,其可以在低于现有技术所需温度的温度下燃烧PM(颗粒物),并且可以在高温下实现高的PM燃烧速率,并且使用排气净化装置 气体净化催化剂。 废气净化催化剂包含具有脱氧性能的复合氧化物,Ag和在该复合氧化物上共同负载的贵金属。 使用排气净化催化剂的排气净化催化剂和废气净化装置(1)能够提高高温下的PM燃烧率,同时可以在低于现有技术要求的温度的温度下燃烧PM 技术。 另外,能够抑制强制再生,EM劣化,催化剂劣化引起的燃料消耗损失,能够降低汽车的负荷。

    Diesel exhaust gas treatment system
    99.
    发明授权
    Diesel exhaust gas treatment system 有权
    柴油机废气处理系统

    公开(公告)号:US08241579B2

    公开(公告)日:2012-08-14

    申请号:US13242341

    申请日:2011-09-23

    摘要: A catalyst composition for facilitating the oxidation of soot from diesel engine exhaust is provided. The catalyst composition includes a catalytic metal selected from Pt, Pd, Pt—Pd, Ag, or combinations thereof, an active metal oxide component containing Cu and La, and a support selected from alumina, silica, zirconia, or combinations thereof. The platinum group metal loading of the composition is less than about 20 g/ft3. The catalyst composition may be provided on a diesel particulate filter by impregnating the filter with an alumina, silica or zirconia sol solution modified with glycerol and/or saccharose, impregnating the filter with a stabilizing solution, and impregnating the filter with a solution containing the active metal oxide precursor(s) and the catalytic metal precursor(s). The resulting catalyst coated diesel particulate filter provides effective soot oxidation, exhibits good thermal stability, has a high BET surface area, and exhibits minimal backpressure.

    摘要翻译: 提供了一种用于促进柴油机废气中的烟灰氧化的催化剂组合物。 催化剂组合物包括选自Pt,Pd,Pt-Pd,Ag或其组合的催化剂金属,含有Cu和La的活性金属氧化物组分,以及选自氧化铝,二氧化硅,氧化锆或其组合的载体。 组合物的铂族金属负载量小于约20g / ft 3。 可以通过用用甘油和/或蔗糖改性的氧化铝,二氧化硅或氧化锆溶胶溶液浸渍过滤器,将催化剂组合物提供在柴油机微粒过滤器上,用稳定溶液浸渍过滤器,并用含有活性物质的溶液浸渍过滤器 金属氧化物前体和催化金属前体。 所得到的催化剂涂覆的柴油颗粒过滤器提供有效的烟灰氧化,显示出良好的热稳定性,具有高的BET表面积,并表现出最小的背压。