4.5 Article

Aqueous-Phase Oxidation of Furfural to Maleic Acid Catalyzed by Copper Phosphate Catalysts

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CATALYSIS LETTERS
卷 147, 期 11, 页码 2714-2723

出版社

SPRINGER
DOI: 10.1007/s10562-017-2191-5

关键词

Furfural; Oxidation; Metal pyrophosphates; Maleic acid; Furoic acid

资金

  1. [APVV-0297]

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This work describes catalytic aqueous-phase oxidation of furfural to maleic acid. The heterogeneous Cu-phosphate catalysts were prepared by coprecipitation method at different atomic ratios of precursors and characterized by various techniques. The CaCu-phosphate catalyst showed the best catalytic performance. Using this catalyst under reaction conditions (115 A degrees C and 0.8 MPa of O-2) 37.3 mol% yield and 54.8% selectivity of maleic acid were achieved. This catalyst can be recycled more than four times producing practically the same selectivity as fresh one by 13% decrease in furfural conversion. The proposed mechanism involves furoic acid as an intermediate in the formation of maleic acid.

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