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公开(公告)号：AU2846197A
公开(公告)日：1997-07-03
申请号：AU2846197
申请日：1996-12-11
Applicant: BASF AG , DAIMLER BENZ AG
Inventor： FETZER THOMAS , MORSBACH BERND , HARTWEG MARTIN , ROITZHEIM RALF-DIRC , SEIBOLD ANDREA , WALZ LEONHARD
Abstract: PCT No. PCT/EP96/05532 Sec. 371 Date Jun. 2, 1998 Sec. 102(e) Date Jun. 2, 1998 PCT Filed Dec. 11, 1996 PCT Pub. No. WO97/21482 PCT Pub. Date Jun. 19, 1997NOx, where x is 1 and 2, in exhaust gases is reduced over heterogeneous catalysts with hydrocarbons, carbon monoxide, hydrogen or mixtures thereof in the presence of oxygen from 100 to 650 DEG C. and an absolute pressure of from 0.5 to 50 bar by a process in which the heterogeneous catalysts used are bimodal or polymodal compounds of the general formula IA1-xM2O4(I),which, if required, are doped with rare earth metals, noble metal, titanium, vanadium, molybdenum, tungsten or mixtures thereof, and where A is magnesium, calcium, titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper, zinc, tin or mixtures thereof, M is aluminum, gallium, indium, tin, chromium, manganese, iron, cobalt, nickel, copper, zinc or mixtures thereof and x is from 0 to 0.99, whose oxygen atoms are in a cubic close packed arrangement and A is present in the tetrahedral sites and M in the octahedral sites, it also being possible for A to occupy octahedral sites if an equivalent amount of M occupies tetrahedral sites.
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公开(公告)号：DE4420932A1
公开(公告)日：1996-01-11
申请号：DE4420932
申请日：1994-06-16
Applicant: BASF AG , DAIMLER BENZ AG
Inventor： HARTWEG MARTIN , HEINAU MARTINA , SEIBOLD ANDREA , WALZ LEONHARD
Abstract: A catalyst consisting of a spinel having formula CuaZncAldO4 where a + c + d = 3, a>0, c>0 and d>0 is used for the catalytic reduction of NOx and/or the oxidation of hydrocarbons present in waste gases. Also claimed is a method for mfg. such a catalyst from copper oxide, cobalt oxide, zinc oxide and aluminium oxide.
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