稀土离子改性膨润土对联苯的选择性硝化  

Selective Nitration of Biphenyl by Rare-Earth Ions Modified Bentionite

作　　者：石春杰[1,2] 邵鑫鑫[1] 聂文[1] 邰燕芳[1,2] 

机构地区：[1]安徽蚌埠学院应用化学与环境工程系,安徽蚌埠233030 [2]蚌埠学院化工应用技术开发研究所,安徽蚌埠233030

出　　处：《武汉工程大学学报》2016年第4期337-342,共6页Journal of Wuhan Institute of Technology

基　　金：安徽省高校自然科学研究一般项目(113052015KJ02);蚌埠学院工程中心项目(BBXYGC2014B05);蚌埠学院自然科学项目(2014ZR14;2013ZR03zd);大学生创新创业训练计划项目(201411305056)

摘　　要：研究了以不同稀土离子改性的膨润土为催化剂,选择性催化联苯的硝化反应.采用傅里叶红外吸收光谱和X射线衍射对稀土离子改性的膨润土进行表征.硝化研究结果表明改性的膨润土对联苯的硝化在硝酸/二氯甲烷体系中的对位选择性高.在该体系中,当硝酸与联苯的摩尔比为3∶1,适量硝酸铈改性的膨润土作为催化剂,15℃下反应10 h后,所得联苯的一硝化产物的最佳邻对比为0.71,硝化产率可达90.8%.该催化剂经过简单处理,煅烧再生后可重复利用,其催化效果基本不变,该工艺环境亲和性好.The selective nitration of biphenyl catalyzed by rare-earth ions modified bentionite was investigated.The rare-earth ions modified bentionite was characterized by Fourier transform infrared spectroscopy and X-raydiffraction.The results of nitration experiment show that the para selectivity of biphenyl nitration in nitric acid/dichloromethane system is good.The ratio of ortho-para of biphenyl mononitration product is 0.71 and the yieldof nitration is up to 90.8% in nitric acid/ dichloromethane system catalyzed by appropriate dosage of ceriumnitrate modified bentionite at the molar ratio of nitric acid to biphenyl of 3∶1,and 15 ℃ for 10 h.The catalystscan be reused by simple treatment and regeneration,with good effect and environmental friendliness.

关 键 词：膨润土 催化硝化 稀土离子 联苯 选择性 

分 类 号：TQ246[化学工程—有机化工] TQ204