Journal
CATALYSTS
Volume 10, Issue 1, Pages -Publisher
MDPI
DOI: 10.3390/catal10010007
Keywords
halloysite; hierarchical materials; p-xylene oxidation; terephthalic acid
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Funding
- Ministry of Science and Higher Education of the Russian Federation [RFMEFI57717X0239]
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Bimetallic MnCo catalyst, supported on the mesoporous hierarchical MCM-41/halloysite nanotube composite, was synthesized for the first time and proved its efficacy in the selective oxidation of p-xylene to terephthalic acid under conditions of the AMOCO process. Quantitative yields of terephthalic acid were achieved within 3 h at 200-250 degrees C, 20 atm. of O-2 and at a substrate to the Mn + Co ratio of 4-4.5 times higher than for traditional homogeneous system. The influence of temperature, oxygen, pressure and KBr addition on the catalyst activity was investigated, and the mechanism for the oxidation of p-toluic acid to terephthalic acid, excluding undesirable 4-carboxybenzaldehyde, was proposed.
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