Toyo Engineering Corporation

Riken Keiki Co., Ltd.

Tetsuya Kawabe

Keiji Mase

Masashi Takahashi

Shozo Ishibashi

Nobuo Nakano

Genshi Nishikawa

Keishi Sano

Kimihito Haruta

Katsunori Yagoh

Yasuhiro Terauchi

Yuichiro Wakashima

Kouzi Suzuki

A fluidized bed or fluidized bed/spouted bed granulator into which urea seed particles, an aqueous urea solution and air are introduced to produce urea particles with an average particle size of 1 mm or more. The granulator includes a box-shaped granulation chamber with a bottom floor, a top and side surfaces. Inner wall surfaces of the chamber are of a metal plate material, an upper part of the side or top surfaces includes an exhaust outlet, the side surfaces or top surface includes an inlet for introducing the seed particles, the side surfaces include a collection port for the particles, the aqueous urea solution is introduced from the bottom floor or the side surfaces, the air is introduced from the bottom floor or the bottom floor and the side surfaces, and at least a portion of the inner wall surfaces of the granulation chamber is treated by surface roughening.

Fluidized bed granulator or fluidized bed/spouted bed granulator

A detecting material to detect formaldehyde at low concentration in the atmosphere in a short time is prepared by impregnating a base material containing at least silica gel with a coloring liquid containing 4-amino-4-phenyl-3-ene-2-one and a buffer solution and volatilizing the solvent.

Formaldehyde detecting material

Growing community of inventors

Tokyo, Japan

Tetsuya Kawabe