AMORPHOUS ALUMINUM SILICATE HAVING EXCELLENT ADSORPTION CHARACTERISTIC IN HIGH HUMIDITY RANGE, AND ITS MANUFACTURE METHOD

摘要

PROBLEM TO BE SOLVED: To provide an adsorbent having excellent adsorption performance in a high humidity range, by using an amorphous aluminum silicate. SOLUTION: An amorphous aluminum silicate having a peak around -93 ppm in a29Si solid NMR spectrum is synthesized by mixing a monosilicate water solution and an aluminum solution so as to have a Si/Al ratio of 1.0-3.0, and performing desalting and heating after adjusting the pH to 6-8 with an acid or an alkali. The obtained amorphous aluminum silicate has a water vapor adsorption amount of 30 wt.% or less in the relative humidity of 0-80% and a moisture adsorption amount of 70 wt.% or more in the relative humidity of 80-98% or higher. COPYRIGHT: (C)2008,JPO&INPIT