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研究了脱铝HY沸石 (n(Si) /n(Al) =3 8)上萘 (naph)的选择性叔丁基化反应 .结果表明 ,八面沸石对该反应过程有较好的择形催化作用 ,两种异构化产物 (2 ,6 二叔丁基萘和 2 ,7 二叔丁基萘 )之间存在着热力学平衡 ,即两种异构化产物可在酸性中心位上相互转化 .在以叔丁醇为烷基化试剂 ,WHSV =2h-1,n(t BuOH) /n(naph) =3,反应温度为 12 0℃的反应条件下 ,萘的转化率可达 98 4 3% ,β 位选择性可高达 10 0 % ,二叔丁基萘收率可达 74 34% ,2 ,6 二叔丁基萘 / 2 ,7 二叔丁基萘质量比为6 2 4
The selective tert-butylation of naphthalene on dealuminated HY zeolite (n (Si) / n (Al) = 38) was studied.The results show that the faujasite zeolite has better shape selectivity for this reaction Catalysis, there is a thermodynamic equilibrium between the two isomerization products (2,6-di-tert-butylnaphthalene and 2,7-di-tert-butylnaphthalene), ie the two isomerized products can be converted to each other at the acidic site Under the reaction conditions of tert-butanol as alkylating reagent, WHSV = 2h-1, n (t BuOH) / n (naph) = 3 and the reaction temperature is 120 ℃, the conversion of naphthalene can reach 98 4 3%, β-position selectivity up to 100%, di-tert-butyl naphthalene yield up to 74 34%, 2,6-di-tert-butylnaphthalene / 2, 7 di-tert-