PRODUCTION OF ARTIFICIAL ZEOLITE

Japanese Patent JP3431499

B2

PROBLEM TO BE SOLVED: To obtain an artificial zeolite having a high cation exchange capacity in a short time by heating incineration ash at a specified temp. in the presence of water and an alkali.
SOLUTION: One or more incineration ashes selected from incineration ash of paper making sludge, incineration ash of activated sludge and incineration ash of combustible waste and, optionally, ≥20 wt.% glass are mixed to prepare a mixture. The ashes have ≥45% silica content, ≤1% moisture content, ≤5% ignition loss, a specific gravity of ≥1.95 and ≥2,700 cm2/g specific surface area and ≥75% of the total ashes pass through a 44 μm standard sieve. The mixture, water and an alkali are fed into an autoclave 1 with an agitator from a starting material feed hole 6 by way of a screw conveyor 2, satd. steam is blown from a steam inlet 8 to keep 2-30 kg/cm2 internal pressure and they are subjected to a reaction by heating to 120-230°C. The resultant reaction product is classified to obtain the objective artificial zeolite having 20-30 μm particle diameter and ≥300 cmol (+).kg-1 cation exchange capacity.

WO/1999/046782	FERROMAGNETIC PARTICLES
WO/2003/006376	A PROCESS FOR PREPARING ZEOLITES USING PYRROLIDINIUM CATIONS

Akio Hemmi
Etsuro Sakaue

JP16454098A

July 28, 2003

June 12, 1998

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Akio Hemmi
Etsuro Sakaue

C01B39/02; (IPC1-7): C01B39/02

JP5155611A
JP5221628A
JP692624A
JP6239612A
JP7196315A
JP2229709A
JP717757A
JP11236212A
JP10296205A

【文献】愛媛大学農学部紀要、33(2)、(1989)、逸見彰男、石炭クリンカーアッシュおよび製紙スラッジ焼却
【文献】逸見彰男、環境対策シリーズ1-産業廃棄物のゼオライト転換による際資源化、有効利用技術開発:石炭灰・製

Takao Yagino

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