【摘要】 考察了 O2 / 2 -乙基蒽氢醌 (EAHQ) / [C5 H5 NC1 6 H33]3PW4O1 6 催化体系对苯乙烯选择性环氧化中的溶剂效应和催化剂稳定性等 .发现在邻苯二甲酸二甲酯和磷酸三丁酯的混合溶剂中 ,由于邻苯二甲酸二甲酯的配位作用较强 ,对催化剂的活性有抑制作用 ;若以甲苯取代部分邻苯二甲酸二甲酯 ,催化剂有较好的活性、较高的选择性及很好的稳定性 .当催化剂的摩尔用量从 2 -乙基蒽氢醌的 1/ 10 0减少到 1/ 80 0时 ,反应结果基本保持不变 .该体系对环氧苯乙烷的选择性达 92 % ,催化剂的转化数达 5 0 0更多还原

【Abstract】 The solvent effect and the stability of the catalyst were investigated in the system including 2\|ethylanthrahydroquinone/O 2 /[C 5H 5NC 16 H 33 ] 3PW 4O 16 for epoxidation of styrene. In the dimethyl phthalate and tributylphosphate mixed solvent, the catalyst is inactive due to the strong coordination ability of dimethyl phthalate, but the selectivity for styrene oxide in this mixed solvent is better than that in the toluene and tributylphosphate mixed solvent. When a part of dimethyl phthalate is substituted by toluene, the catalyst becomes active and keeps a high selectivity for styrene oxide as in the dimethyl phthalate and tributylphosphate mixed solvent. The catalyst is stable under the reaction conditions. In this system, the selectivity for styrene oxide is 92%, and the turnover number of the catalyst is 500.更多还原