Cr^(Ⅵ)载体氧化试剂的制备和应用研究——微波促进三氧化铬/硅胶氧化试剂的制备  

Preparation and Applications of Supported Chromium Trioxide Oxidant ——Microwave Promoted Preparation of Supported CrO_3/SiO_2 Oxidant

作　　者：李谦和[1] 陈亮[1] 尹笃林[1] 李雪辉[2] 王乐夫[2] 

机构地区：[1]湖南师范大学精细催化合成研究所,中国长沙410081 [2]华南理工大学化工学院,中国广州510640

出　　处：《湖南师范大学自然科学学报》2004年第4期55-58,共4页Journal of Natural Science of Hunan Normal University

基　　金：国家自然科学基金资助项目(20206010);广东省自然科学基金资助项目(031419)

摘　　要：研究了三氧化铬 硅胶氧化试剂的制备方法,以苯甲醇选择性氧化成苯甲醛为探针反应,考察了载体、制备方法、活化条件及微波处理对氧化剂性能的影响.实验结果表明:载体对氧化剂的活性影响很大,不同载体制得的氧化剂活性顺序为:HZSM 5<HM 2,石英砂,NaY<CrO3<硅藻土<硅胶;微波可有效地促进载体试剂的活化,大大缩短活化时间,提高氧化剂的活性.The method of preparation of supported CrO3/SiO2 oxidation reagent was studied in this paper. The activity of CrO 3/SiO2 oxidation reagent was evaluated in the selective oxidation reaction of benzyl alcohol to benzaldehyde. The effects of the kinds of carriers, preparation methods and the conditions of activation, as well as the microwave irradiation on the activity of CrO3/SiO2 were investigated. Experimental results indicated that the kinds of carrier have an important effect on the activity of CrO3/SiO2. The activity for selectively oxidation of benzyl alcohol to benzaldehyde follows the order; HZSM-S 3 < kieselguhr < Silica gel. Furthermore, it is demonstrated that the microwave irradiation enhances the activation process, decrease the activation time and increase the activity of the supported reagent.

关 键 词：三氧化铬 微波促进 氧化剂 硅胶 载体 CRO3 活化时间 试剂 活性 高氧 

分 类 号：TQ351.472[化学工程] R446[医药卫生—诊断学]