Mitsubishi Chemical Industries Limited

Kunichi Matsushita

Kazuhiko Onuma

Hikaru Sakurada

Yasuo Oguri

Junji Saito

Takeshi Okano

Mitsuo Uchida

Takao Kaneko

Shinichi Fujii

Nitrogen oxides in exhaust gases are catalytically reduced in the presence of oxygen and ammonia at 200.degree. to 600.degree. C. over a catalyst of at least one catalyst component selected from the group consisting of compounds of metals of Groups 1B, 5A, 6A, 7A and 8 of the periodic table, and lanthanides and tin which is supported on a specific carrier comprising a main component of calcium silicate.

Catalytic reduction of nitrogen oxides

A process for preparing a shaped titanium oxide catalyst carrier which comprises calcining titanium oxide at 400.degree. C-800.degree. C as a first calcining step, then shaping the titanium oxide followed by calcining the shaped material at 300.degree. C-800.degree. C as a second calcining step.

Process for preparing titanium oxide shaped carrier

A catalyst for the selective reduction of nitrogen oxides in exhaust gases in the presence of ammonia is vanadium oxide supported on a specific carrier of the anatase form of titanium oxide.

Catalyst for selective reduction of nitrogen oxides

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Yokohama, Japan

Kunichi Matsushita