论文部分内容阅读
:研究了温度、时间及方式等负载条件对茂金属载体催化剂性能的影响 ,探讨了反应机理 .试验表明 :负载温度在 5 0℃时 ,锆的质量分数及催化活性均出现一个峰值 ,但温度超过 70℃时 ,w(Zr)迅速增加 ,这是载体结构SiO2 MAO受到破坏所致 ;w(Zr)随负载时间的延长而略有增大 ,当负载时间超过 10h ,w(Zr)趋于不变 .茂金属负载于SiO2 MAO上时 ,其催化活性为 2 .2 3× 10 6 g·mol- 1 ·h- 1 ,远高于茂金属直接负载在SiO2 上的活性
: The effects of temperature, time and mode on the performance of metallocene catalysts were investigated and the reaction mechanism was discussed.The results showed that when the temperature was 50 ℃, the mass fraction of zirconium and the catalytic activity all showed a peak, but the temperature When the temperature exceeds 70 ℃, the content of w (Zr) increases rapidly, which is caused by the destruction of SiO2 MAO. The content of w (Zr) slightly increases with the increase of load time. When the load time exceeds 10h, Unchanged.The catalytic activity of metallocene supported on SiO2 MAO was 2.23 × 10 6 g · mol -1 · h -1, much higher than the activity of metallocene directly supported on SiO 2