Chinese Journal of Applied Chemistry

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Synthesis and Characterization of Heteroatomic Ti-Mn-β Zeolite and Its Catalytic Performance on Phenol Hydroxylation

WU Juan, GAO Bingying, HE Hongyun*   

  1. (College of Chemistry and Chemical Engineering,Hunan Normal University,Changsha 410081,China)
  • Received:2014-01-23 Revised:2014-03-03 Published:2014-10-09 Online:2014-10-09

Abstract: Ti-Mn-β zeolite was hydrothermally synthesized in a SiO2-TiO2-MnO2-(TEA)2O-H2O-NH4F system. The structural characteristics of the products were determined by X-ray diffraction, infrared spectroscopy, UV-Vis diffuse reflectance spectroscopy, thermogravimetry-differential thermal analysis, scanning electron microscopy, and X-ray photoelectron spectroscopy. The factors affecting the synthesis of Ti-Mn-β zeolite were investigated. The results show that the Ti-Mn-β zeolites have good catalytic activity in the hydroxylation of phenol with H2O2 as the oxidant. The phenol conversion is 29.8%, and the selectivities for catechnol and HQ are 70.9% and 26%, respectively.

Key words: hydroquinone Ti-Mn-&, beta, zeolite, hydrothermal synthesis, phenol hydroxylation

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