A study on alkylation of naphthalene with long chain olefins over zeolite catalyst

The liquid-phase alkylation reactions of naphthalene with long chain olefins(C 11 −C 12 ) over two different zeolite catalysts, HY and Hβ, were investigated. It was found that zeolite HY showed higher activity and mono-alkylnaphthalene selectivity than that of Hβ. Zeolite HY being modified by La 3+ and alkaline earth ions, Mg 2+ , Ca 2+ , Sr 2+ , Ba 2+ , were studied. Reaction results showed that zeolite HY modified by La 3+ and Mg 2+ would provide better activity, selectivity and catalyst stability than HY. The optimum loading amount was 1% for MgO and 7% for La 2 O 3 respectively and the conversion of olefins was over 90% as well as the mono-alkylnaphthalene selectivity is 100% at 403K, 1.0Mpa, VHSV=10ml/g·cat and naphthalene/olefin/cyclohexane (molar ratio)=6/1/60.