CuNaX催化苯甲醇无溶剂氧化合成苯甲醛  

Solvent-Free Oxidation of Benzyl Alcohol to Benzaldehyde over CuNaX Catalyst

作　　者：汤清虎[1] 谢小培[1] 胡钰[1] 王岩岩[1] 赵培正[1] 

机构地区：[1]河南师范大学化学化工学院,河南新乡453007

出　　处：《河南师范大学学报（自然科学版）》2015年第3期63-68,共6页Journal of Henan Normal University(Natural Science Edition)

基　　金：国家自然科学基金项目(21301051);河南省教育厅科学技术研究重点项目(14A150043)

摘　　要：通过简单离子交换法制备了不同铜含量的CuNaX催化剂,研究了催化剂在无溶剂条件下用70%叔丁基过氧化氢(TBHP)氧化苯甲醇合成苯甲醛反应中的催化性能.实验结果表明,随着铜含量的增加,苯甲醛的收率呈先增大后减小的趋势.当铜含量为10.4%时,苯甲醛的收率最高.在催化剂用量100mg、n(TBHP)/n(苯甲醇)=1.3、反应温度70℃、反应时间6h的优化条件下,苯甲醛的产率达34.7%.且该催化剂重复使用3次之后,苯甲醛的收率和选择性无明显下降.较高的铜含量将使NaX分子筛的结构发生部分破坏,导致苯甲醛的收率下降.A series of CuNaX catalysts with different Cu content were synthesized by a simple ion-exchange method. The catalytic performance of CuNaX for solvent-free oxidation of benzyl alcohol using tert-butyl hydroperoxide （TBHP） as the oxi- dant was studied. With an increase of Cu-containing, the yield of benzaldehyde firstly increased and then decreased. Under an optimized reaction condition of catalyst 100 mg, n（TBHP）/n（benzylalohol） 1. 3, T70 C, and reaction time 6 h, up to 34.7 of benzaldehyde yield could be achieved over CuNaX with a Cu-containing of 10.4. The catalyst could be recycled for 3 runs without appreciable loss of its activity. A higher Cu-containing would lead to a partial destruction of original texture of NaX and a lower benzyldehyde yield could be seen.

关 键 词：无溶剂氧化 含铜分子筛 苯甲醇 苯甲醛 

分 类 号：O643[理学—物理化学]