| 摘要 |
An industrially advantageous method is provided for producing crystalline silicotitanate which has excellent cesium and strontium adsorption/removal characteristics in ocean water. This method for producing crystalline silicotitanate represented by the general formula Na4Ti4Si3O16・nH2O) (in the formula, n represents 0-8) is characterized by involving a first step for obtaining a gel mixture by mixing a silicic acid source, a sodium compound, titanium tetrachloride and water, and a second step for producing hydrothermal reactions in the gel mixture obtained in the first step, wherein, in the first step, the silicic acid source, the sodium compound and the titanium tetrachloride are added such that the molar ratio Ti/Si of the Ti and Si contained in the gel mixture is 1.2-1.5 and the molar ratio Na2O/SiO2 of Na2O and SiO2 is 0.7-2.5. |
