浓+H2SO4+改性活性炭催化乙苯与氯化苄的苄基化反应.pdf

?230
化学世界
2014年
浓H2SO4改性活性炭催化乙苯与氯化苄的苄基化反应
侯国安2,郝枫林…,杨金会
(1.宁夏大学天然气转化国家重点实验室培育基地,宁夏银川759021
2,银川能源学院,宁夏银川750015;3.华西中学,守夏银川750021)
摘要:以活性炭负載浓硫酸作为固体催化剂,以乙苯与氯化苄为原料进行合成反应,研究了反应
温度、反应时间、原料配比和催化剂用量对反应的影响,确定了最佳反应条件:即n(乙苯):(氟化
苄)=3:1,反应温度90℃,反应时间8h,催化剂用量为13.2%(相对于氯化苄),邻苄基乙苯产率
29.9%;n(乙苯):n(氣化)=3:1,反应温度90℃,反应时间9h,催化剂用量18.4%(相对于氯
化苄),对苄基乙苯产率40.1%;m(乙苯):n(氯化苄)=3:1,反应温度90℃,反应时间7h,催化剂
用量18.4%(相対于氟化芋),间苄基乙苯产率8.1%
关键词:乙苯;改性活性炭;催化
中图分类号:()621.25
文献标志码:A
文章编号:0367-6358(2014)04-0230-04
Concentrated H> SO -modified Activated Carbon Catal
or Benzyl Reaction of Ethylbenzene and Benzyl Chloride
HOU Guo-ar
HAO Feng-ling", YANG J
(1. Sate Key Laboratory Cultivation Base ofnatural Gas Conuersion, Ningria Uniwersityningria Yinchuan 750021, China
2. Yinchun Energy Institute, Ningria Yinchuan 750015, China; 3. Huazi Middle School, Ning. ia Yinchuan 7500211 China)
Abstract: Activated carbon loaded concentrated sulfuric acid was used as a solid catalyst for the reaction of
ethylbenzene and benzyl chloride. The effect of reaction temperature, reaction time, materias ratio an
the amount of catalyst on the reaction was studied. The optimal reaction conditions were as followed when
n (ethylbenzene): n(benzyl chloride)=3: 1, reaction temperature was 90C, reaction time was 8 h, and
catalyst amount was 13. 2%(relative to benzyl chloride), the o-benzyl ethylbenzene yield was 29.9%; n
(ethylbenzene): n(benzyl chloride)=3: 1, reaction temperature was 90C, reaction time was 9 h, and
catalyst dosage was 18.4%(relative to benzyl chloride>, the -benzyl ethylbenzene yicld was 40.1%0 m
(ethylbenzene): n(benzyl chloride) =3: 1, reaction temperature was 90, reaction time was 7h, and
catalyst dosage was 18.4%(relative to benzyl chloride), the mt-benzyl ethylbenzene yield was 8. 1%
Key words: ethylbenzene; modified activated carbon; catalysis
基乙苯是一种重要的精细化学品及中间体,均相条件下进行的,催化剂不易与原料和产物分离、
传统的合成方法是用质子酸做催化剂,如H2SO、腐蚀设备严重,副产物多,环境污染严重,因此绿色
HF、HCL04、H3PO1等。这类酸催化反应都是在非均相催化剂越来越受到人们的青睐。
收稿日期:201306-08;修回日期:2013-0723
基金项目:国家自然科学基金(21162021);教育部“新世纪优秀人オ支持计划项目”(NCET09-0860);银川能源学院科研瑛目(2013-KY
Y04)
作者简介:侯国安(1975-),男,宁夏中卫人,硕士生,主要从事有机合成及化工设备设计的研究。E-mail:1256094407@qo
mailyangjh(@nxu.edu.cn