METHOD FOR PREPARING ZSM-5 ZEOLITE USING CRYSTALLINE NANO-SIZED ZSM-5 NUCLEUS, CAPABLE OF OBTAINING UNIFORM ZSM-5 ZEOLITE WITHOUT IMPURITIES

摘要

PURPOSE: A method for preparing ZSM-5 zeolite is provided to control the crystal size of ZSM-5 zeolite by varying the size of crystalline nano-sized ZSM-5 nucleus.;CONSTITUTION: A method for preparing ZSM-5 zeolite includes a nucleus preparing process, a reaction mixture preparing process, and a crystallizing process. In the nucleus preparing process, the size of ZSM-5 nucleus is between 70 and 300nm. In the reaction mixture preparing process, the ZSM-5 nucleus is added in a base liquid to obtain a reaction mixture. The base liquid includes water glass silica source, alumina source, a neutralizing agent, and water. The mixture is crystallized at temperature between 150 and 200 degrees Celsius.;COPYRIGHT KIPO 2011