柠檬酸浸渍改性H-β沸石对2-(4′-乙基苯甲酰基)苯甲酸脱水合成2-乙基蒽醌反应的催化性能

催化学报 ›› 2008, Vol. 29 ›› Issue (8): 701-704.

柠檬酸浸渍改性H-β沸石对2-(4′-乙基苯甲酰基)苯甲酸脱水合成2-乙基蒽醌反应的催化性能

翟玲娟1,刘民1,董香梅1,宋春山1,2,郭新闻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, 美国宾夕法尼亚 16802

收稿日期:2008-08-25 出版日期:2008-08-25 发布日期:2012-06-20

Dehydration of 2-(4′-Ethylbenzoyl)benzoic Acid to 2-Ethylanthra-quinone over H-β Zeolite Impregnated with Citric Acid

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

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:2008-08-25 Online:2008-08-25 Published:2012-06-20

摘要/Abstract

摘要： 采用浸渍法制备了柠檬酸改性的H-β沸石催化剂,采用X射线衍射、X射线荧光、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,并考察了催化剂对2-(4′-乙基苯甲酰基)苯甲酸(EBA)脱水合成2-乙基蒽醌(EAQ)反应的催化性能. 结果表明,经柠檬酸改性没有破坏H-β沸石的骨架结构,但其酸量明显减少. 柠檬酸浸渍改性后未经水洗的催化剂上有较多的非骨架铝及柠檬酸残留; 水洗至中性的催化剂在EBA脱水合成EAQ反应中有较好的催化性能, EBA转化率可高达96.5%, EAQ选择性可高达96.0%.

关键词: H-β沸石, 柠檬酸, 浸渍, 2-(4′-乙基苯甲酰基)苯甲酸, 脱水, 2-乙基蒽醌

Abstract: H-β zeolite catalyst samples were prepared by impregnation with citric acid and were characterized byX-raydiffraction,X-rayfluorescence, Fourier transform infrared spectroscopy, nuclear magnetic resonance, and temperature-programmed desorption. The catalytic performance of the catalyst samples for dehydration of 2-(4′-ethylbenzoyl)benzoic acid (EBA) to 2-ethylanthraquinone (EAQ) was measured. The results showed that the impregnated samples remained the topological structure of H-β zeolite. There was more residual extra-framework aluminum and citric acid on the unwashed sample after impregnation. The sample washed with deionized water after impregnation exhibited high activity and selectivity in the reaction of EBA dehydration. The conversion of EBA was 96.5%, and the selectivity for EAQ was 96.0%

Key words: H-β zeolite, citric acid, impregnation, 2-(4′-ethylbenzoyl)benzoic acid, dehydration, 2-ethylanthraquinone

翟玲娟;刘民;董香梅;宋春山;郭新闻. 柠檬酸浸渍改性H-β沸石对2-(4′-乙基苯甲酰基)苯甲酸脱水合成2-乙基蒽醌反应的催化性能[J]. 催化学报, 2008, 29(8): 701-704.

ZHAI Lingjuan;LIU Min;DONG Xiangmei;SONG Chunshan;GUO Xinwen*. Dehydration of 2-(4′-Ethylbenzoyl)benzoic Acid to 2-Ethylanthra-quinone over H-β Zeolite Impregnated with Citric Acid[J]. Chinese Journal of Catalysis, 2008, 29(8): 701-704.

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