Sherman & Shalloway
Process for reducing nitrogen oxides to nitrogen
 A catalyst composition for reducing nitrogen oxides, which is characterized in that the same contains, as its chief ingredient, PA1 A. tin (Sn) as the component A, and PA1 B. at least one metal selected from the group consisting of molybdenum (Mo), tungsten (W), and iron (Fe), as the component (B). in the form of their oxides, and a process for reducing nitrogen oxides to nitrogen, which comprises contacting a gaseous mixture containing nitrogen oxides and molecular oxygen and a reducing gas with aforesaid catalyst composition at elevated temperatures. 
Babcock-Hitachi K.K. Hitachi, Ltd. Mitsubishi Petrochemical Company Limited
B B B B B B B
B01D B01D B01J B01D B01D B01D B01J
additional additional inventional inventional additional additional inventional
Yoshihisa Makoto Fumito Toshikatsu Shimpei Masato Shigeo
Watanabe Imanari Nakajima Mori Matsuda Tekeuchi Uno