催化学报

催化学报 ›› 2009, Vol. 30 ›› Issue (1): 9-13.

• 研究论文 • 上一篇    下一篇

有机酸改性Hβ沸石催化剂上2-(4′-乙基苯甲酰基)苯甲酸脱水闭环合成2-乙基蒽醌

翟玲娟1,刘民1,董香梅1,宋春山1,2,郭新闻1   

  1. 1 大连理工大学精细化工国家重点实验室, 辽宁大连 116012; 2 宾夕法尼亚州立大学能源与地球环境工程系, 宾夕法尼亚 16802, 美国
  • 收稿日期:2009-01-25 出版日期:2009-01-25 发布日期:2012-10-17

Dehydration of 2-(4′-Ethylbenzoyl)-benzoic Acid to 2-Ethylanthra-quinone over Hβ Zeolite Modified with Organic Acids

ZHAI Lingjuan1, LIU Min1, DONG Xiangmei1, SONG Chunshan1,2, GUO Xinwen1*   

  1. 1 State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116012, Liaoning, China; 2 Department of Energy and Geo-Environmental Engineering, Pennsylvania State University, Pennsylvania 16802, USA
  • Received:2009-01-25 Online:2009-01-25 Published:2012-10-17

PDF

843

被引次数

15

摘要： 采用柠檬酸等有机酸对Hβ沸石样品进行改性,研究了改性后Hβ沸石样品在2-(4′-乙基苯甲酰基)苯甲酸(BEA)脱水闭环合成2-乙基蒽醌(2-EAQ)反应中的催化性能. 采用X射线衍射、X射线荧光光谱、红外光谱、核磁共振和程序升温脱附方法对催化剂进行了表征. 结果表明,有机酸改性没有破坏Hβ沸石样品的骨架结构,但其有序度和结晶度均有不同程度的降低,而且酸量明显减少; 其中草酸改性后的催化剂脱铝严重. 柠檬酸、酒石酸、苹果酸和丙二酸改性后的Hβ沸石样品在合成2-EAQ的反应中有较好的反应性能,以其为催化剂, BEA的转化率和2-EAQ的选择性均在95.0%以上.

关键词: Hβ沸石, 有机酸, 改性, 2-(4′-乙基苯甲酰基)苯甲酸, 脱水反应, 2-乙基蒽醌

Abstract: Hβ zeolite was modified with seven organic acids. Their catalytic perform ance in dehydration of 2-(4′-ethylbenzoyl)-benzoic acid ( BEA ) to 2-ethylanthraquinone (2-EAQ) was studied. Hβ zeolites modified with cit ric acid (Hβ-c), tartaric acid (Hβ-t), malic acid (Hβ-m), and propanedioic acid (Hβ-p) showed high catalytic activity. The BEA conversion and 2-EAQ sel ectivity were both up to 95.0%. A suitable amount of acid sites with proper aci d strength is needed for the reaction. Excess or deficiency of concentration and strength of acid sites would result in dehydration between molecules or lower the catalyst activity.

Key words: Hβ zeolite, organic acid, modification, 2-(4′-ethylbenzoyl)-benzoic acid, dehydration, 2-ethylanthraquinone