Heterogeneous catalysts based on vanadyl phosphate for fructose dehydration to 5-hydroxymethyl-2-furaldehyde

被引:140
作者
Carlini, C
Patrono, P
Galletti, AMR
Sbrana, G
机构
[1] Univ Pisa, Dipartimento Chim & Chim Ind, I-56126 Pisa, Italy
[2] CNR, IMAI, I-00016 Monterotondo, Italy
关键词
5-hydroxymethyl-2-furaldehyde; fructose dehydration; inulin; vanadyl phosphate; heterogeneous catalysis;
D O I
10.1016/j.apcata.2004.07.026
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Vanadyl phosphate (VOP) was used as acid catalyst in the dehydration of fructose aqueous solutions to afford 5-hydroxymethyl-2-furaldehyde ;(HMF). Promising results, in terms of activity (turnover frequency (TOF) approximate to 200 mmol HMF/cat h) and selectivity, have been achieved. New catalytic systems, obtained by substitution of some VO3+ groups with trivalent metals (Fe3+, Cr3+, Ga3+, Mn3+, Al3+), were also checked. In particular, when Fe-substituted VOP was employed the highest up to now reported activities were obtained working, on concentrated fructose solutions in the presence of a low amount of catalyst (TOF up to 376). Notwithstanding the high concentration of the substrate in aqueous medium neither insoluble polymeric by-products nor HW rehydration compounds were formed. Finally, preliminary experiments carried out with VOP catalysts supported on inorganic oxides allowed to conclude that this approach is promising, provided that a support with proper acid character is adopted. (C) 2004 Elsevier B.V. All fights reserved.
引用
收藏
页码:111 / 118
页数:8
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