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Date of Publication:2018-01-01

Journal:精细化工

Volume:35

Issue:2

Page Number:255-260,290

ISSN No.:1003-5214

Abstract:A kind of mesoporous niobium phosphate (m-NbP ) solid acid catalyst was successfully synthesized via convenient hydrothermal method. The obtained catalyst was characterized by X-ray diffraction (XRD),nitrogen adsorption-desorption,scanning electron microscopy (SEM),transmission electron microscopy (TEM),temperature-programmed desorption of ammonia (NH3-TPD)and Fourier transform infrared spectra of pyridine adsorption (Py-FTIR). Then,the one-pot conversion of glucose to 5-hydroxymethylfurural (5-HMF)in a biphasic water/DMSO medium was investigated on the m-NbP catalyst. The factors affecting the yield of 5-HMF such as catalyst dosage,volume ratio of water to DMSO, reaction temperature,reaction time,and catalyst recyclability were studied. Moreover,the catalytic performance of m-NbP was compared with other three catalysts (Amberlyst-15,Nb2 O5 and m-NbP-F127). The results indicated that the m-NbP catalyst exhibited a promising catalytic performance for the preparation of 5-HMF due to its porous structure and adequate strong acid sites. The yield of 5-HMF could be as high as 47. 0% at 170℃ within 1. 5 h when the mass ratio of glucose to m-NbP was 2:1 and the volume ratio of water to DMSO was 1:1. Noticeably,the m-NbP catalyst could be recycled to reuse, after recycled five times,it showed no obvious deactivation after high-temperature calcination-regeneration. Therefore,the as-prepared m-NbP is an efficient catalyst for one-pot preparation of 5-HMF.

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