Oxalic Acid Modification of β Zeolite for Dehydration of 2-(4′-Ethylbenzoyl) Benzoic Acid

Min Liu, Yanxin Yin, Xinwen Guo, Chunshan Song

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12 Scopus citations


A commercial β zeolite was modified with dilute oxalic acid solutions, and evaluated in the catalytic dehydration of 2-(4′-ethylbenzoyl)-benzoic acid (BEA) to produce 2-ethylanthraquinone (2-EAQ). The modified zeolite samples were characterized by X-ray diffraction, Ar-physisorption, X-ray fluorescence spectroscopy, Fourier transform infrared spectroscopy, 27Al MAS NMR and ammonia temperature-programmed desorption. The results show that the modified samples maintain the BEA topology and microporous textural properties. However, dealumination, caused by the modification, leads to dramatic variations in acid properties, including the amount of acid sites, ratio of strong to weak acid sites, and the ratio of Brönsted to Lewis acid sites. The variations in acidity enhance the catalytic performance of BEA dehydration to produce 2-EAQ. The catalytic selectivity was tripled, and the activity increased significantly.

Original languageEnglish (US)
Pages (from-to)8850-8856
Number of pages7
JournalIndustrial and Engineering Chemistry Research
Issue number31
StatePublished - Aug 9 2017

All Science Journal Classification (ASJC) codes

  • General Chemistry
  • General Chemical Engineering
  • Industrial and Manufacturing Engineering


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