AMORPHOUS ALUMINUM SILICATE SALT MANUFACTURING METHOD, ALUMINUM SILICATE SALT OBTAINED WITH SAID METHOD, AND ADSORPTION AGENT USING SAME

摘要

The present invention aims to provide an adsorbent with superior adsorption performance of 20 wt% or more in a humidity range of 5 to 60 wt% by using a low-cost reagent as the raw material. Aluminum sulfate is used as the Al source, the respective aqueous solutions are mixed to achieve a Si/Al molar ratio of 0.70 to 1.0 in the mixed solution, the pH is adjusted to be 6 to 9 with acid or alkali, the solution is heated at 90 to 110°C and subsequently subject to desalination treatment in order to synthesize an amorphous aluminum silicate. The obtained amorphous aluminum silicate yields a superior water vapor adsorption performance of 20 wt% or more in a relative humidity of 60%, and can be used as an adsorbent for desiccant air conditioning and as other adsorbents.