ODOR ADSORBENT MADE BY VERMICULITE AND PERLITE

摘要

PURPOSE: Provided is an odor adsorbent made by vermiculite and perlite, which has advantages over other adsorbents such as activated carbon and zeolite in that after the odor adsorbent is exhausted, it can be used as moisture controller in composing process, let along its cost competitiveness. CONSTITUTION: The process for manufacturing an odor adsorbent includes steps of (i) crushing vermiculite and perlite into a particle size suitable to calcination, followed by sorting; (ii) calcining the vermiculite and perlite particle where resident time in calcination furnace is controlled not to sinter vermiculite and perlite particle; (iii) sieving the calcined vermiculite and perlite particle to select particles with particle size distribution suitable for adsorbent applications; (iv) immersing the selected vermiculite and perlite particles in hydrochloric acid 1N for more than 12 hours, wherein for uniform dispersion of metal salts into vermiculite and perlite particles against surface tension, the internal pressure of an immersing vessel is regulated lower than air pressure by at least 10KPa; and (v) gravity-dewatering vermiculite and perlite particles after acid treatment, followed by drying.