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  

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

作　　者：翟玲娟[1] 刘民[1] 董香梅[1] 宋春山[1,2] 郭新闻[1] 

机构地区：[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,美国宾夕法尼亚16802

出　　处：《催化学报》2009年第1期9-13,共5页

基　　金：新世纪优秀人才支持计划(NCET-04-0268);高等学校学科创新引智计划(111计划)

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.Hβ zeolite was modified with citric acid, tartaric acid, malic acid, propanedioic acid, lactic acid, acetic acid, and oxalic acid, respectively, and characterized by X-ray diffraction, X-ray fluorescence, Fourier transform infrared spectrometer, nuclear mag- netic resonance, and temperature-programmed desorption. The catalytic performance of the samples in the dehydration of 2-（4′-ethyl- benzoyl）-benzoic acid （BEA） to 2-ethylanthraquinone （2-EAQ） was studied. The results showed that Hβ maintained the BEA topological structure after being modified by organic acids, but their relative crystallinity and amount of acid groups decreased, and dealumination could be clearly observed after the modification. Hβ zeolites modified with citric acid, tartaric acid, malic acid, and proPanedioic acid showed great catalytic performance in the dehydration reaction of BEA to 2-EAQ. The conversion of BEA and the selectivity for 2-EAQ were both up to 95.0%.

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 

分 类 号：O643.32[理学—物理化学]