铁基复合氧化物催化苯酚羟基化反应诱导期的研究  

STUDY ON INDUCTION PERIOD IN HYDROXYLATION OF PHENOL CATALYZED BY IRON-BASE COMPOSITE OXIDES

作　　者：张信芳[1] 张光明[1] 陈晓冬[2] 张敬畅[3] 张天巧[2] 

机构地区：[1]清华大学深圳研究生院,深圳518055 [2]中国石油化工股份有限公司北京燕山分公司研究院,北京102500 [3]北京化工大学理学院,北京100029

出　　处：《精细石油化工》2004年第6期26-30,共5页Speciality Petrochemicals

基　　金：国家自然科学基金(20076004);中国石化股份有限公司燕山分公司资助项目

摘　　要：以Fe-Mg-O/γ-Al2O3作催化剂,研究了催化剂用量、反应温度、醋酸加入量对苯酚羟基化反应诱导期的影响。以磷氧化物改性制备的复合氧化物Fe-AE做催化剂,水为溶剂,反应温度65℃,反应时间30min,苯酚5.3g,催化剂0.051g,过氧化氢/苯酚(摩尔比)0.33:1,溶剂水10.6g,反应诱导期仅5min,苯酚转化率21.2%,苯二酚选择性92.9%,过氧化氢有效利用率59.6%。最后推测了苯酚羟基化的自由基机理。The origination and influential factors of induction period of the phenol hydroxylation catalyzed by the supported iron-base composite oxides and modified by phosphorus oxides (Fe-AE) were used as catalyst under the following conditions: reaction temperature 65℃,reaction time 30 min, phenol 5. 3 g, catalyst 0. 051 g, hydrogen peroxide/phenol (molar ratio) 0. 33:1, and water/phenol (weight ratio) 2. 0 :1. the phenol conversion is 21. 2%, the selectivity of dehydroxy-benzene is 92. 9% and the induction period is 5 min. Finally, the double free radicals mechanism of phenol hydroxylation were presumed.

关 键 词：苯酚羟基化 诱导期 催化剂用量 反应温度 溶剂 加入量 摩尔比 复合氧化物 铁基 Γ-AL2O3 

分 类 号：TE626.21[石油与天然气工程—油气加工工程] O643[理学—物理化学]