A METHOD FOR PRODUCING ALUMINA-SILICA PILLARED CLAY USING POST INTERCALATION OF ORGANIC TEMPLATE

摘要

PURPOSE: A method for producing alumina-silica pillared clay using post intercalation of an organic template is provided to secure an excellent humidity-controlling characteristic. CONSTITUTION: A method for producing alumina-silica pillared clay using post intercalation of an organic template comprises the following steps of: putting clay into distilled water, and expanding montmorillonite to obtain a clay colloidal solution; mixing 2N HCl, ethanol, and TEOS(tetraethyl orthosilicate); stirring the mixture at room temperature for 1.5-2.5 hours and obtaining a silica sol; dropping 1N AlCl3·6H2O into the silica sol and letting them react to each other at 80°C for 1 hour to obtain an alumina(Al2O3)-silica(SiO2) sol; mixing the alumina-silica sol and clay colloidal solution and leaving them to react at 50~70°C for 2-4 hours; performing an ion exchanging reaction at room temperature for 10-14 hours and filtering the obtained precipitate; eliminating unreacted ions from it and obtaining an alumina-silica pillared clay precursor; adding octadecylamine to the alumina-silica pillared clay precursor 4-6 times as much as CEC(cation exchange capacity); post-intercalating it at room temperature for 10-14 hours and filtering the obtained precipitate; washing it with distilled water to remove unreacted ions; and sintering it at 550~700°C for 3-5 hours.