Kurashiki Boseki Kabushiki Kaisha

Sumio Tani

Masumi Saito

Shigeaki Kasaoka

Shigeaki Matsui

Kunihiro Oshima

Kazuhiko Kogoh

Tateo Ito

Yuri Nozaki

The present invention provides the polymer particles prepared by polymerizing monomer components which comprise as at least a part of polymerizable components a monomer of the formula (I): ##STR1## , wherein R is hydrogen atom or methyl group, n is a number of from 0 to 30 and m is a number of from 0 to 30 provided that m+n.gtoreq.1 and a process for preparing the polymer particles.

Porous polymer particles and preparation method thereof

A catalyst for reduction of nitrogen oxides in the presence of ammonia, which can be advantageously prepared by treating titanium slag with sulfuric acid at an elevated temperature, optionally followed by treatment with an alkali, and decomposing the resulting product while heating at a temperature of about 400.degree. to 700.degree. C and has a high catalytic activity with a long catalytic life and a high resistance to acid substances.

Catalyst for reduction of nitrogen oxides in presence of ammonia

The reduction of nitrogen oxides is effected by passing stack offgases containing nitrogen oxides over a heavy metal sulfide catalyst in an atmosphere where ammonia is present.

Process for reducing nitrogen oxides

Growing community of inventors

Neyagawa, Japan

Sumio Tani