ZA-92型甲苯歧化与烷基转移催化剂的研制与工业应用

Development and Application of ZA-92 Toluene Disproportionation and Transalkylation Catalyst

研制成ZA－92型甲苯歧化与烷基转移催化剂，在反应压力3．0MPa、WHSV1．32h(-1)、氢烃分子比6．7／1下反应500h，反应温度380～392℃，转化率41．89mol％。苯加C8A选择性97．00mol％。在398kt／a引进装置上工业运转701天，在反应压力3．0～3．2MPa、反应温度353～383℃、平均WHSV0．91h(－1)条件下，转化率40．18mol％，选择性96．65mol％，其特点是反应温度低，提温速度慢。现仍在继续运转中，尚未再生，预期第一运转周期在三年以上。

ZA-92 toluene disproportionation and transalkylation catalyst, a solid acid prepared by combininghigh-silica mordenite and mesopore alumina, was successfully developed and applied to an industrial reactor with throughput of 398kt/a for 701 days under pressure of 3. 0 MPa and WHSV of 0. 91h-1, withthe temperature raised from 353℃ to 383℃. The average conversion is 40.18 mol% and B+C8A selectivity is 96.65 mol%. The results show that the reaction temperature is lower and the rate of temperature enhancement is slower than some other catalysts. The ZA-92 catalyst, still being used in the plantwithout regeneration, may have a expected first cycle service life of additional three years.