Article
Huang et al.
method. The conversion of furfural as well as the yield
and the selectivity of maleic acid were calculated as
follows:
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CONCLUSIONS
The route of producing maleic acid from renewable
furfural over MP catalysts was investigated for the first
time. The types of metal sites determined the catalytic
activity of porphyrins during the furfural oxidation reac-
tion. FeTPPCl was found to be the most active catalyst.
The peripheral substituents in MPs also had a remarkable
impact on the catalytic activity. FeT(p-Cl)PPCl, which
contains electron-attracting group (−Cl), exhibited the
best catalytic efficiency to the reaction. FeT(p-Cl)PPCl
produced a yield of 44% maleic acid with the load of
40 mg at 90ꢀC for reaction of 10 h under 1.2 MPa oxy-
gen pressure. Moreover, recyclability experiments showed
that the FeT(p-Cl)PPCl catalyst could be reused in five
recycles without any significant decrease in the catalytic
performance. We studied the application of MPs in the
field of catalytic conversion of biomass and demonstrated
that MPs exhibited good catalytic activity in furfural oxi-
dation under milder conditions. Further works on sup-
ported MPs to be used in the reaction are going on.
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ACKNOWLEDGMENTS
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This work was supported by the MOE & SAFEA
through the 111 Project (B13025).
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J. Chin. Chem. Soc. 2017