Sumitomo Chemical Company, Limited

Sachio Oishi

Hiroshi Fukusen

Shinkichi Shimizu

Tatsuo Shiraishi

Tetsu Wakabayashi

Hiroyuki Nishikawa

Hironori Yamanaka

Michito Nakao

A method for charging a catalyst in particles to a tubular reactor having many vertically arranged reactor tubes of a definite length, which comprises inserting a wire formed in an optional shape into each reactor tube at the upper opening thereof, supplying the catalyst particles to the reactor tube to allow them to fall along the wire and gradually withdrawing the wire with or without vertical fluctuation as the height of the filled catalyst layer increases, thereby slowing down the falling velocity of the catalyst particles to prevent them from being crushed or powdered and at the same time obtaining a uniform bulk density of the filled catalyst.

Method for catalyst charging to tubular reactor

The process involves stripping ammonium nitrogens and organic materials, as gases, which are present in process waste waters to be discharged from plants wherein gases for use in ammonia synthesis are manufactured by reforming hydrocarbons with steam, decomposing the organic materials selectively in the presence of a catalyst at a temperature of about 120.degree. to 400.degree. C., mixing the remaining gases with the flue gases from said plants so as to provide a gaseous mixture having ammonia therein in an amount of about 0.3 to 10 moles per mole of nitrogen oxides present in the flue gases, reacting the gaseous mixture over a catalyst at a temperature of about 150.degree. to 700.degree. C. and oxidizing the unreacted ammonia, if any, in the presence of a catalyst at a temperature of about 150.degree. to 700.degree. C. to render the nocuous substances innocuous.

Process for concurrently treating process waste waters and flue gases

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Sachio Oishi