Abstract
AbstractBackgroundIsophthalic acid (IPA) is commercially produced using the Co–Mn–Br catalyst system, which suffers from the shortcomings of the discharge of CH3Br and corrosion of equipment. It is necessary to develop a technology to avoid the pollution caused by bromide. The production of IPA from the oxidation of m‐xylene (MX) by air is realized under catalysis with H3PW12O40 (HPW) loaded on carbon and cobalt.ResultsTartaric acid has been used to improve the catalytic activity of the HPW@C catalyst. Experiments indicate that the best modification condition is calcining the carbon at 450 °C for 4 h after being soaked in a 2.0 mol L−1 tartaric acid solution for 10 h. Surface characterization reveals that the tartaric acid modification leads to an increase in the acid groups and a reduction in the basic groups on the carbon surface.ConclusionsThe MX conversion obtained using the HPW@C catalyst prepared from modified carbon is 6.77% over that obtained using the HPW@C catalyst prepared from the original carbon. The IPA generated using the former is 71.1% over that generated using the latter. The catalytic activity of the HPW@C catalyst relies on its surface chemical characteristics and physical properties. The surface chemistry plays a more important role than the physical properties. © 2020 Society of Chemical Industry
Published Version
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