FIELD: catalysts for organic syntheses. SUBSTANCE: catalyst for alkylation of benzene with propylene is made up of 50-99.5 wt % crystalline silicon phosphates (silicon pyrophosphate and mixture of silicon orthophosphate with silicon pyrophosphate in ratio from 4.00 to 0.02), and amorphous silicophosphates and/or phosphoric acid (the balance). EFFECT: improved performance characteristics. 2 cl, 1 tbl
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