Catalyst for the purification of exhaust gases of internal combustion
engines
    3.
    发明授权
    Catalyst for the purification of exhaust gases of internal combustion engines 失效
    用于净化内燃机废气的催化剂

    公开(公告)号:US4294726A

    公开(公告)日:1981-10-13

    申请号:US120172

    申请日:1980-02-11

    摘要: A three-way catalyst is described for the purification of automobile exhaust gases formed of an active substance of platinum and rhodium and possibly base metal(s) at a certain weight ratio between the two noble metals and at a certain atomic ratio between the noble and the base metal, which are precipitated onto active aluminum oxide containing certain quantities of CeO.sub.2, ZrO.sub.2 and Fe.sub.2 O.sub.3, and whereby the catalyst is obtained by impregnating active aluminum oxide, possibly stabilized with alkaline earth metal, with a solution of cerium, zirconium and iron salt which is thereupon calcined in air at 500.degree.-700.degree. C. and then treated after application of an impregnation of salts of the active substance components in a gas current containing hydrogen at temperatures below 650.degree. C.

    摘要翻译: 描述了一种三元催化剂,用于净化由铂和铑的活性物质和可能的贱金属以一定的重量比形成的汽车废气,并以一定的原子比在贵金属和 贱金属,其沉积在含有一定量的CeO 2,ZrO 2和Fe 2 O 3的活性氧化铝上,并且由此通过用碱土金属浸渍活性氧化铝,用铈,锆和铁盐溶液浸渍得到催化剂 然后在空气中在500〜700℃下煅烧,然后在温度低于650℃的含氢气体中浸渍活性物质成分的盐后进行处理。

    Exhaust gas purification apparatus for an internal combustion engine of
motor vehicles
    10.
    发明授权

    公开(公告)号:US4353208A

    公开(公告)日:1982-10-12

    申请号:US179393

    申请日:1980-08-19

    IPC分类号: F01N3/28 F02B1/04

    CPC分类号: F01N3/2807 F02B1/04

    摘要: An exhaust gas purification apparatus for an internal combustion engine including a catalyst chamber containing a catalyst composition for the catalytic conversion of harmful substances contained in the exhaust gases wherein the interior wall of the exhaust pipe connecting the engine with the catalyst chamber is provided with a catalytically active coating for at least a portion of its length.

    摘要翻译: 一种内燃机的废气净化装置,其特征在于,具备含有催化剂组合物的催化剂室,所述催化剂组合物用于催化转化废气中含有的有害物质,其中,将所述发动机与所述催化剂室连接的排气管的内壁设置有催化剂 活性涂层至少部分长度。