Nanostructured catalyst particle/catalyst carrier particle system
    1.
    发明授权
    Nanostructured catalyst particle/catalyst carrier particle system 有权
    纳米结构催化剂颗粒/催化剂载体颗粒体系

    公开(公告)号:US06680279B2

    公开(公告)日:2004-01-20

    申请号:US10056381

    申请日:2002-01-24

    IPC分类号: B01J2340

    摘要: A method of dispersing nanosized catalyst particles on the surface of larger catalyst carrier particles is disclosed. The coating process is done dry and yields high effective surface area of nanosized catalyst particles coated on the surface of catalyst carrier particles. In this process, nanosized catalyst particles and catalyst carriers are mechanically mixed in a high velocity and impact force environment to which catalyst particles are embedded, or filmed, on the surface of catalyst carrier particles without using water or any other additional chemicals. The catalyst composite structure produced comprises better coating uniformity of the catalyst particle on its catalyst carrier. The catalyst particle/catalyst carrier composite produced can be applied to a support structure, such as a monolith as readily used in automotive or other applications.

    摘要翻译: 公开了将纳米尺寸催化剂颗粒分散在较大催化剂载体颗粒表面上的方法。 涂覆过程完成干燥,并产生涂覆在催化剂载体颗粒表面上的纳米尺寸催化剂颗粒的高有效表面积。 在该方法中,纳米尺寸的催化剂颗粒和催化剂载体在不使用水或任何其它附加化学品的情况下,在催化剂载体颗粒的表面上,在催化剂颗粒被嵌入或成膜的高速度和冲击力环境中机械混合。 所生产的催化剂复合结构包括催化剂颗粒在其催化剂载体上的更好的涂层均匀性。 所生产的催化剂颗粒/催化剂载体复合材料可以应用于容易用于汽车或其他应用的支撑结构,例如整料。

    Noble metal catalyst
    2.
    发明授权
    Noble metal catalyst 有权
    贵金属催化剂

    公开(公告)号:US06956007B2

    公开(公告)日:2005-10-18

    申请号:US10647403

    申请日:2003-08-25

    摘要: The present invention provides a method of making a noble metal catalyst, where the noble metal is distributed on the surface of special composite carrier particles. Nanometer sized oxide particles are first dry coated by an impact mixing process on the surface of larger alumina particles. In general, this dry coating process coats the nanometer sized particles on the surface of the alumina particles. A suitable solution of noble metal(s) compound is then soaked on the surface of the composite carrier particles. Ultimately, the noble metal compound is decomposed by calcining and noble metal particles dispersed with large effective surface area on the composite carrier particles. The resultant catalyst structure improves catalyst performance while making efficient and effective use of the expensive noble metal.

    摘要翻译: 本发明提供一种贵金属催化剂的制造方法,其中贵金属分布在特殊复合载体颗粒的表面上。 首先通过冲击混合工艺将纳米尺寸的氧化物颗粒在较大氧化铝颗粒的表面上干燥。 通常,这种干涂层工艺将氧化铝颗粒表面上的纳米尺寸的颗粒涂覆。 然后将合适的贵金属化合物溶液浸泡在复合载体颗粒的表面上。 最终,通过煅烧分解贵金属化合物和在复合载体颗粒上分散有大的有效表面积的贵金属颗粒。 所得到的催化剂结构提高催化剂性能,同时有效地使用昂贵的贵金属。

    Method for making monodispersed noble metal nanoparticles supported on oxide substrates
    4.
    发明授权
    Method for making monodispersed noble metal nanoparticles supported on oxide substrates 有权
    制备单分散的贵金属纳米粒子负载在氧化物基底上的方法

    公开(公告)号:US06992039B2

    公开(公告)日:2006-01-31

    申请号:US10388241

    申请日:2003-03-13

    摘要: A method for uniformly dispersing noble metal particles on a porous carrier by first mixing an alkoxide product of aluminum or silicon and a noble metal precursor together; then mixing a surfactant into the mixture; then mixing ammonia solution into the mixture to form a hydroxide of aluminum or silicon; then mixing a reducing agent into the mixture to convert the noble metal precursor into noble metal nanoparticles dispersed on the hydroxide; then separating the noble metal nanoparticles and the hydroxide from the mixture before calcining the hydroxide into an oxide of aluminum or silicon.

    摘要翻译: 通过首先将铝或硅的醇盐产物和贵金属前体混合在一起,将贵金属颗粒均匀分散在多孔载体上的方法; 然后将表面活性剂混合到混合物中; 然后将氨溶液混合到混合物中以形成铝或硅的氢氧化物; 然后将还原剂混合到混合物中以将贵金属前体转化成分散在氢氧化物上的贵金属纳米颗粒; 然后在将氢氧化物煅烧成铝或硅的氧化物之前将贵金属纳米颗粒和氢氧化物从混合物中分离出来。