Journal
CHEMICAL ENGINEERING JOURNAL
Volume 306, Issue -, Pages 777-783Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2016.08.017
Keywords
Oxidation; p-Xylene; 2,5-Dihydroxyterephathalic acid; MCM-41; Catalyst
Categories
Funding
- National Natural Science Foundation of China [21263027, 21573193, 21367024, 21464016]
- Program for Innovation Team of Yunnan Province
- Innovative Research Team (in Science and Technology) in Universities of Yunnan Province
- Key Laboratory of Advanced Materials for Wastewater Treatment of Kunming
- Yunnan Educational Committee [ZD2012003]
- Science and Technology Research Project of Chongqing Municipal Education Commission of China [KJ1403003]
- Program for Excellent Talents in University of Chongqing
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One-step hydroxylation of C-H (sp(2)) of aromatic ring synchronized with the oxidation of C-H (sp(3)) of side chain of p-xylene to 2,5-dihydroxyterephathalic acid was performed using M-MCM-41 (M = Fe, Fe/Cu, Cu) as the catalysts. Cu-MCM-41 (Cu:Si = 1:100) catalyst exhibited good selectivity (73.0%) of 2,5-dihydroxyterephathalic acid and conversion (21.7%) of p-xylene using acetic acid and acetonitrile (V: V = 3:7) as the solvents at 80 degrees C for 5 h. The possible mechanism of the oxidation of p-xylene to 2,5-dihydroxyterephathalic acid was proposed and would guide us to design high performance catalyst for sp(2) and sp(3) C-H oxidation. This procedure is also expected to be an alternative method to Kolbe-Schmitt Process for the synthesis of o-hydrobenzoic acids and their derivatives. (C) 2016 Elsevier B.V. All rights reserved.
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