Solvent-Free Oxidation of Benzyl Alcohol to Benzaldehyde over CuNaX Catalyst
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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.
作者：
汤清虎 谢小培 胡钰 王岩岩 赵培正
机构地区：
betway官方app 化学化工学院
出处：
《betway官方app 学报：自然科学版》 CAS 北大核心 2015年第3期63-68,共6页
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)
关键词：
无溶剂氧化 含铜分子筛 苯甲醇,苯甲醛
solvent-free oxidation copper-containing molecular sieves benzyl alcohol benzyldehyde
分类号：
O643 [理学—物理化学]
