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通过Tyndall效应、电子显微镜观察、超过滤实验和非水体系电导率测定证明 ,Fe(naph) 2 Al(i Bu) 3 CH2 CHCH2 Cl 催化剂在溶有丁二烯的加氢汽油介质中为胶体分散系 ,活性位位于胶粒表面 ,因此是胶体催化剂 .Al(i Bu) 3 以缔合状态存在并解离成离子对 ;它同Fe (naph ) 2 的反应是形成胶核的主要反应 ;与CH2 CHCH2 Cl 反应生成的氯化异丁基铝在胶核表面形成活性位 ;适当过量Al(i Bu) 3 形成双电层 ,使胶粒相对稳定 .催化剂颗粒是无定型的 .催化剂各组分的配比影响胶粒的形态 ,其中以较佳配比所得到的催化剂胶粒较小 ,分布均匀 ,催化活性高 .因是聚结不稳定胶体体系 ,陈化时胶粒迅速聚结长大 ,因而催化活性显著降低
The Tyndall effect, electron microscopy, ultrafiltration experiments and non-aqueous conductivity measurements show that the Fe (naph) 2 Al (i Bu) 3 CH2 CHCH2Cl catalyst is colloidally dispersible in a butadiene-dissolved hydrogenated gasoline medium The active site is located on the surface of colloidal particles and therefore is a colloidal catalyst. Al (i Bu) 3 exists as an association state and dissociates into ion pairs; its reaction with Fe (naph) 2 is the main reaction to form a colloid; and CH2 CHCH2 Cl reaction generated isobutyl aluminum chloride in the core surface of the active site formation; appropriate excess Al (i Bu) 3 to form an electric double layer, the rubber particles are relatively stable catalyst particles are amorphous The catalyst components Of the ratio of the impact of colloidal morphology, in which a better ratio of the resulting catalyst micelle small, uniform distribution, high catalytic activity because of coalescence unstable colloidal system, the aging of the rubber particles quickly coalescence and growth , So the catalytic activity is significantly reduced