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筛选出三种改性的ZSM-5分子筛催化剂,对于甲苯甲基化生成对二甲苯都有较高的选择性。考察了磷改性的ZSM-5中磷含量对催化活性和选择性的影响。对于P-HZSM-5(Ⅲ)催化剂,进行了操作条件影响的探讨。
Three kinds of modified ZSM-5 zeolite catalysts were screened out, which have higher selectivity for methylation of toluene to p-xylene. The effect of phosphorus content on the catalytic activity and selectivity of phosphorus-modified ZSM-5 was investigated. For P-HZSM-5 (Ⅲ) catalyst, the influence of operating conditions was investigated.