1
Barry K Speronello, John W Byrne, James M Chen: Staged metal-promoted zeolite catalysts and method for catalytic reduction of nitrogen oxides using the same. Engelhard Corporation, May 14, 1996: US05516497 (111 worldwide citation)

A zeolite catalyst composition is provided in which a first or upstream zone of the catalyst has a lower metal (e.g., iron or copper) promoter loading than the metal promoter moter loading of the second or downstream zone of the catalyst. The first zone may contain from none up to about 1 percent by ...


2
Barry K Speronello, John W Byrne, James M Chen: Staged metal-promoted zeolite catalysts and method for catalytic reduction of nitrogen oxides using the same. Engelhard Corporation, June 18, 1991: US05024981 (66 worldwide citation)

A zeolite catalyst composition is provided in which a first or upstream zone of the catalyst has a lower metal (e.g., iron or copper) promoter loading than the metal promoter loading of the second or downstream zone of the catalyst. The first zone may contain from none up to about 1 percent by weigh ...


3
Speronello Barry K, Byrne John W, Chen James M: Catalyseurs en couches de type zeolite, ameliores par un metal et methode pour la reduction catalytique doxydes dazote avec ceux-ci, Staged metal-promoted zeolite catalysts and method for catalytic reduction of nitrogen oxides using the same. Engelhard Corporation, SIM & MCBURNEY, April 29, 1997: CA2012039

A zeolite catalyst composition is provided in whicha first or upstream zone of the catalyst has a lower metal(e.g., iron or copper) promoter loading than the metal pro-moter loading of the second or downstream zone of the cat-alyst. The first zone may contain from none up to about 1percent by weight ...