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1. 发明授权

US5945369A Catalyst for purifying exhaust gases and process for producing the same 失效
标题翻译：净化废气的催化剂及其制造方法
公开(公告)号：US5945369A
公开(公告)日：1999-08-31
申请号：US569396
申请日：1995-12-08
申请人： Mareo Kimura , Yoriko Matsuoka , Hideo Sobukawa , Masayuki Fukui , Akihiko Suda , Toshio Kandori , Yoshio Ukyo
发明人： Mareo Kimura , Yoriko Matsuoka , Hideo Sobukawa , Masayuki Fukui , Akihiko Suda , Toshio Kandori , Yoshio Ukyo
IPC分类号： B01D53/94 , B01J23/10 , B01J23/63 , B01J23/38
CPC分类号： B01D53/945 , B01J23/10 , B01J23/63 , B01D2255/206 , B01D2255/20715 , B01D2255/40 , Y02T10/22
摘要： A catalyst for purifying exhaust gases includes a porous support; a cerium oxide or a solid solution of a cerium oxide and a zirconium oxide in a state of mutual solid solution, loaded on the porous support; and a noble metal element loaded on the porous support. The cerium oxide or the solid solution has an average particle diameter of from 5 to 100 nm. The cerium oxide is present in the solid solution in an amount of from 0.2 to 4.0 by molar ratio with respect to the zirconium oxide therein. The catalyst can be prepared by: coating and calcinating on a support substrate a slurry of a cerium oxide sol, a cerium oxide sol and a zirconium oxide sol, on a solid solution powder of a cerium oxide and a zirconium oxide in a state of mutual solid solution; and loading a noble metal element thereon. The cerium oxide or its solid solution has a surface area large enough to effect an oxygen storage function, and has an average particle diameter large enough to prevent the same from entering deeply into fine pores of a porous support, thereby providing a catalyst fully exhibiting both of the oxygen storage capability and the catalytic activity.
摘要翻译：用于净化废气的催化剂包括多孔载体; 以相互固溶态的氧化铈或氧化铈和氧化锆的固溶体装载在多孔载体上; 以及负载在多孔载体上的贵金属元素。氧化铈或固溶体的平均粒径为5〜100nm。相对于其中的氧化锆，氧化铈以相对于氧化锆的摩尔比为0.2〜4.0的量存在于固溶体中。催化剂可以通过以下步骤制备：在氧化铈和氧化锆溶胶的固溶体粉末上以相互的状态将氧化铈溶胶，氧化铈溶胶和氧化锆溶胶的浆料在载体基材上涂覆和煅烧固溶; 并在其上装载贵金属元素。氧化铈或其固溶体具有足够大的表面积以实现储氧功能，并且具有足够大的平均粒径以防止其相当于深入多孔载体的细孔中，从而提供充分显示两者的催化剂的储氧能力和催化活性。

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