High-performance adsorbents comprising aluminum silicate complexes and complexes

Dehumidifying agent for desiccant air conditioning with high-performance adsorption properties in mid and high humidity region, and aims to provide an adsorbent also has excellent adsorption performance as a gas adsorbent such as carbon dioxide, ammonia and formaldehyde be one that, after the Si / Al ratio is adjusted precursor suspension is from 0.70 to 1.0, by heating for 2 days at 110 ° C. or higher, layered low-crystalline clay mineral and the amorphous synthesizing a complex consisting of quality aluminum silicate. The resulting layered low-crystalline clay mineral and the amorphous aluminum silicate consisting of complexes and a relative humidity of 60% has a 45 wt% or more superior water vapor adsorption performance, use as an adsorbent for desiccant air conditioning be able to. The 100kPa~900kPa has 12 wt% or more excellent carbon dioxide absorption and desorption amount capable in, it can be used further as a gas adsorbent such as ammonia and formaldehyde.