METHOD OF PRODUCING MONOALKYLATED AROMATIC COMPOUNDS WITH HIGH LINEARITY AND CONTROLLED ISOMERY

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FIELD : chemistry. SUBSTANCE : invention relates to a method of producing a linear monoalkylaromatic compound with controlled concentration of 2-phenyl isomers and very low colour index after sulphonation, involving use of a catalyst system based on highly stable solid catalysts. The alkylation process is carried out with a catalyst which enables to obtain a linear alkylaromatic compound with minimum content of 2-phenyl isomers, which constitutes 20 wt %, contains MOR type zeolite, from 0.01 to 0.20 wt % of at least one metal selected from a group consisting of Li, Na, K, Mg or Ca, with maximum Na content of 0.01%, and from 0 to 0.5 wt % of at least one metal selected from a group consisting of Ti, Zr and Hf, wherein the catalyst, which enables to obtain at most 20 wt % 2-phenyl isomers, also contains FAU type zeolite, from 0.5 to 2 wt % of at least one metal selected from a group consisting of Li, Na, K, Mg or Ca, and rare-earth metals in amount of : from 4.5 to 10 wt % La, from 1.2 to 4 wt % Ce, from 0.5 to 1.5 wt % Pr and from 2 to 3 wt % Nd. EFFECT : high activity and high selectivity with respect to linear monoalkylated compounds. 19 cl, 8 ex, 28 tbl, 3 dwg