| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing artificial zeolite of high performance at a low cost by solving the problem caused by residual silicon inhibiting a zeolite formation reaction. SOLUTION: In the method for producing artificial zeolite by using coal ash as a main raw material and sodium aluminate as an auxiliary raw material, slurry consisting of coal ash and an alkali aqueous solution of sodium hydroxide or the like is subjected to primary heating treatment, thereafter, sodium aluminate is added to the slurry, and secondary heating treatment is performed thereto, so that artificial zeolite is produced. The sodium aluminate can be produced by mixing an amorphous alumina-based raw material to an alkali aqueous solution of sodium hydroxide or the like, stirring the mixture, and performing heating treatment. COPYRIGHT: (C)2005,JPO&NCIPI
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