Cooper, Dunham, Clark, Griffin & Moran
Process for removal of nitrogen oxides from waste gas
 A process for the removal of nitrogen oxides from a waste gas containing said nitrogen oxides in conjunction with sulfur oxides is disclosed, which process comprises allowing said waste gas to come into contact with ammonia as the reducing agent at temperature in the range of from 250.degree. to 550.degree. C in the presence of a catalyst wherein an active component containing iron or copper as the active metal is supported on a silica-alumina type carrier containing not less than 60% by weight of silica and the pore volume occupied by the pores measuring 150 A or over in diameter exceeds 0.15 cc/g, for thereby causing selective catalytic reduction of said nitrogen oxides. 
Japan Gasoline Company, Ltd.
B B B B B B
B01D B01J B01J B01J B01D B01J
inventional additional inventional additional inventional additional
Takehiko Noriyuki Fusao Tomiaki Tadashi Kintaro Katsuhiko Tsutomu Katuaki
Takeda Suzuki Nishida Yamada Asanabe Tsuda Adachi Yanagihara Ohsato