REGULARITIES OF O-XYLENE ALKYLATION WITH TERT-BUTANOL ON MODIFIED Y-TYPE ZEOLITES

Catalytic activity change regularities of Y type of zeolites have been studied in the alkylation reaction of o-xylene with tert-butanol when varying their chemical composition. It revealed that the activity and selectivity of the zeolite catalyst for 1,2-dimethyl-tert-butylbenzene (DMTBB) is defined by the degree of ion exchange, nature of polyvalent cation and correlation of SiO2 / Al2O3 in the zeolite framework. High activity and selectivity of the catalyst in the DMTBB synthesis have been achieved under optimal combination of protonic acid sites with the said characteristics. Yield and selectivity by DMTBB is 84,6% in theory at 1500. temperature on optimal catalyst composition of 0,83 LaNaY.