Process for preparing artificial zeolite by a slurry reaction method
AssigneeK.E.M. Corporation
InventorYukuo Katayama
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Abstract
A process is provided for the preparation of artificial zeolite comprising the steps of (a) mixing x kilograms of incineration ash or any other aluminosilicate-containing substance with y liters of an aqueous solution of alkali metalhydroxide having a concentration of 1 N or higher in a proportion, y/x, of from about 0.1 to about 1.5 (liter/kg) to prepare a slurry, and (b) heating the slurry to cause a zeolite forming reaction. Water is continuously or intermittently removed by evaporation so that a decrease in a concentration of alkali which would otherwise naturally occur during the reaction is at least suppressed to thereby facilitate the reaction.
Claims6
A process for preparing artificial zeolite comprising the steps of:
- (a) mixing x kilograms of incineration ash or another aluminosilicate-containing substance with y liters of an aqueous solution of alkali metal hydroxide having a concentration of 1 N or higher in a proportion, y/x, of from about 0.1 to about 1.5 (liter/kg) to prepare a slurry;
- and
- (b) heating the slurry from step (a) at a temperature of at least about 125° C. in a closed system to cause a zeolite-forming reaction wherein water is continuously or intermittently removed by evaporation so that a decrease in a concentration of alkali which would otherwise naturally occur during the reaction is at least suppressed to thereby facilitate the reaction.
Dependencies are inferred from the claim text.