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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。
The 2,6-DMN reaction of methylnaphthalene with methanol was carried out on Zn2 + modified Hβ zeolite catalyst. The effect of Zn2 + exchange capacity on the specific surface area, the amount of weak acid on the surface of Hβ zeolite catalyst and the catalytic effect of methylnaphthalene on methanol alkylation was investigated. The experimental results show that with the increase of Zn2 + exchange capacity, the specific surface area of the catalyst decreases and the amount of weak acid on the surface of the catalyst increases. After Zn2 + modified catalyst reaction results are improved, and found that the impact of methylnaphthalene methanol alkylation reaction is the main factor of the catalyst surface weak acid.