Synthetic method of straight-chain alkyl aromatic hydrocarbon

The invention relates to a synthesis method of straight-chain alkyl aromatic hydrocarbon, which is characterized in that aromatic hydrocarbon and long-chain olefin are contacted to generate the straight-chain alkyl aromatic hydrocarbon in the presence of a solid acid catalyst loaded with metal with hydrogenolysis performance under alkylation reaction conditions, the solid acid catalyst contains Y-type zeolite with unit cell of 2.448-2.457 nm and a ratio of mesopore volume to total pore volume of 0.15-0.29, and the molecular weight of the Y-type zeolite is 9000-9000. And the metal with hydrogenolysis performance accounts for 0.15-5wt% of the solid acid catalyst. 一种直链烷基芳烃的合成方法，是在烷基化反应条件下，将芳烃和长链烯烃在负载具有氢解性能金属的固体酸催化剂存在下接触生成直链烷基芳烃，其特征在于，所述的固体酸催化剂含有晶胞为2.448～2.457nm、介孔体积与总孔体积的比值为0.15～0.29的Y型沸石，所述的具有氢解性能金属占固体酸催化剂的0.15～5wt％。