PROCESS FOR PRODUCING ZEOLITES WITH BEA, MTW, AND MFI STRUCTURES ADDITIONALLY CONTAINING MESOPORES AND MACROPORES USING CYCLIC DIAMMONIUM

摘要

The present invention relates to the synthesis of zeolites and zeotype molecular sieves having an extremely small crystal size of 5 to 50 nm by adding a cyclic diammonium to a zeolite synthesis composition. Further, the present invention involves molecular sieve materials which are activated or functionalized by a dealumination, an ion exchange, and other post-treatments, and a catalytic activity thereof. The nanocrystalline molecular sieve synthesized by the present invention has mesopores (2 < diameter < 50 nm) and macropores (50 nm < diameter) existing among molecular sieve crystals containing micropores (diameter < 1 nm), thereby increasing molecular diffusion and significantly increasing the activity in the function of a catalyst and an ion-exchange resin as compared to conventional zeolites. Further, the present invention enables the easy diffusion and adsorption of giant molecules, and thus exhibits a significantly high reactivity in the alkylation reaction, acylation reaction, etc., of large organic molecules.