HYDROPHOBIC ZEOLITE COMPOSITION AND ITS PRODUCTION

摘要

PURPOSE:To obtain hydrophobic zeolite wherein the hygroscopicity of zeolite in itself is suppressed by treating the activated natural or synthetic zeolite with a coating agent or a soln. thereof having the hydrophobic property. CONSTITUTION:Activated natural or synthetic zeolite having >=1.5 molar ratio of SiO2/Al2O3 is prepared. After impregnating and treating it in a coating agent or a soln. thereof having the hydrophobic property at >=50 deg.C, a solid phase and a liquid phase are separated. Then the hydrophobic zeolite composition is obtained by heating the treated zeolite phase at >=50 deg.C and removing the residual solvent from the zeolite phase. As the coating agent, liquid paraffin having 0.8-0.9 specific gravity, a fluorine compd. and a silicon series compd. are used.