公开(公告)号：US4197217A

公开(公告)日：1980-04-08

申请号：US930014

申请日：1978-08-01

申请人： Anthony Gartshore ,  Ian R. McGill ,  Allin S. Pratt ,  Eric Shutt

发明人： Anthony Gartshore ,  Ian R. McGill ,  Allin S. Pratt ,  Eric Shutt

IPC分类号： B01D53/94 ,  B01J23/00 ,  B01J23/40 ,  B01J23/74 ,  B01J23/89 ,  B01J37/02 ,  C23C10/52 ,  F01N3/035 ,  F02B3/06 ,  B01J21/04 ,  B01J23/42

CPC分类号： B01D53/945 ,  B01J23/40 ,  B01J23/74 ,  B01J23/89 ,  B01J37/024 ,  F01N3/035 ,  F02B3/06 ,  Y02T10/22

摘要： This invention relates to catalysts suitable for the catalytic oxidation of hydrocarbons and carbon monoxide and for the catalytic reduction of oxides of nitrogen in the presence, respectively, of suitable oxidizing and reducing means. The invention is especially concerned with catalysts which are suitable for the catalytic purification or control of the exhaust gases of petrol driven internal combustion engines and of diesel engines. Such catalysts have been variously described as "three-way", "polyfunctional" and "multi-functional" catalysts. In more detail a three way catalyst of the invention comprises a substrate having supported thereon at least one intermetallic compound of the general formula A.sub.x B.sub.y where A represents one or more Groups VIII metals having an atomic number not larger than 78; B represents one or more metals of the group consisting of Al, Sc, Y, the lanthanides, Ti, Zr, Hf, V, Nb and Ta and x and y are integers.

摘要翻译： 本发明涉及适合用于烃和一氧化碳的催化氧化的催化剂和用于在合适的氧化和还原方式存在下催化还原氮氧化物的催化剂。 本发明特别涉及适用于催化净化或控制汽油驱动的内燃机和柴油发动机废气的催化剂。 这些催化剂已经被描述为“三向”，“多官能”和“多功能”催化剂。 更详细地，本发明的三元催化剂包括其上载有至少一种通式AxBy的金属间化合物的基材，其中A表示一种或多种原子数不大于78的VIII族金属; B表示由Al，Sc，Y，镧系元素，Ti，Zr，Hf，V，Nb和Ta组成的组中的一种或多种金属，x和y是整数。