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对二甲苯是聚酯纤维的重要原料。据报道ZSM-5沸石是选择生成对二甲苯的良好催化剂,采用改性的ZSM-5沸石催化剂可使对二甲苯选择性高达90%以上。近年来有关这方面的研究较多,但将混合稀土改性的催化剂用于甲苯歧化选择生成对二甲
Paraxylene is an important raw material of polyester fiber. It has been reported that ZSM-5 zeolite is a good choice for the formation of p-xylene catalyst, the use of modified ZSM-5 zeolite catalyst p-xylene selectivity up to 90% or more. In recent years, there are many researches on this aspect, but the rare earth-modified catalysts are used in toluene disproportionation to generate para-dimethyl