Zn^(2+)改性β沸石催化合成2,6-二甲基萘

Catalyzed Synthesis of 2,6-DMN Over H β-Zeolites Modified with Zn^(2+)

在Zn2+改性Hβ分子筛催化剂上进行了甲基萘与甲醇的烷基化合成2,6-DMN反应。考察了Zn2+交换容量对Hβ分子筛催化剂的比表面积、表面弱酸量和催化甲基萘与甲醇烷基化效果的影响。实验结果表明:随Zn2+交换容量增加,催化剂的比表面积下降,催化剂表面的弱酸量有所增加。经Zn2+改性后催化剂的反应效果均有提高,同时发现影响甲基萘甲醇烷基化反应的主要因素是催化剂的表面弱酸量。

In this work,the alkylation of methylnaphthalene with methanol over Hβ-zeolites modified with Zn^(2+) was studied.The effect of Zn^(2+) exchange amount on the specific surface area,acid site strength, acid amount and alkylation reaction of methylnaphthalene with methanol was investigated.It was found out that the specific surface area of the catalysts decreased and the total acid amount of catalysts increased with the increase of Zn^(2+) exchange amount,meanwhile the catalytic effect of the alkylation reaction improved.The amount of weak acid was the main factor effecting the alkylation of methylnaphthalene with methanol.