[en] A new approach to the formation of hierarchical porous structure of mordenite without use of templates is suggested in the presented work. The method is based on the crystallization of mordenite in granules consisting of amorphous aluminosilicate (metakaolin), fumed silica and mordenite crystals, provided that the crystalline phase content must be higher than that of the amorphous phase. The synthesized material is characterized by high crystallinity (up to 92%) with the volume of micro-, meso- and macro-pores of 0.15, 0.20 and 0.18 cm³/g, respectively. The research results showed that MOR type zeolite with a hierarchical structure in the H-form has total acidity in ammonia of about 860 µmol/g and after promotion of 0.3% wt platinum exhibits high activity and selectivity in the hydroisomerization of a model mixture of benzene–heptane into methylcyclopentane and isomers of n-heptane.

[en] Studying the activity of any catalyst and selectivity toward special products is easy by selecting a module reaction, and choosing appropriatecondition. In our case the reaction of α- methylstyrene dimerization was a choice to study the activity of mordenite type zeolite crystallized from natural clay mineral (kaolin P-2), and also the selectivity toward dimers.The prepared catalyst in the form of hydrogen showed that the acceptable activity and selectivity to linear dimers were (72.5%), at 80 °C, and atmospheric pressure. Different products from the dimerization of α- methylstyrene over prepared catalyst was investigated, and the conversion rate reached to 73%wt. (paper)