本文着重研究了用各种离子交换或浸渍的ＤＧ分子筛（属ＺＳＭ型）催化剂对甲苯歧化反应的活性和选择性。初步探讨了酸性和催化活性之间的关系。 实验证明了经磷、镁改性的ＤＧ分子筛催化剂孔径变小和弱酸中心的相对增加，而有利于提高对二甲苯的选择性，并抑制二甲苯进一步歧化产生三甲苯。尤为重要的是，在抑制异构化和裂解等副反应，以及活性稳定性等方面比已工业化的Ｈ－丝光沸石催化剂要好，且具有良好的择形催化生成对二甲苯的性能，是甲苯歧化直接台成对二甲苯的一种新型催化剂。 This article focuses on the activity and selectivity of the toluene disproportionation reaction using a variety of ion-exchanged or impregnated DG zeolite (ZSM-type) catalysts. Preliminary discussion of the relationship between acidity and catalytic activity. Experiments show that the pore diameter of phosphorus and magnesium modified DG zeolites and the relative increase of weak acid centers are favorable to improve the selectivity of paraxylene and inhibit the further disproportionation of xylene to produce the toluene. More importantly, it is superior to industrially used H-mordenite catalysts in inhibiting side reactions such as isomerization and cleavage, and in terms of activity stability, and has good performance in shape-forming catalysis to generate para-xylene, and is toluene disproportionation A direct catalyst for p-xylene.