Synthesis Of 5-hydroxymethylfurfural From Amino …

the sulfonic group functionalized ionic liquid--1-H-3-(3-sulfonic acid)propylimidazolium chloride was immobilized on micro-ball silica-gel using 3-chloropropyltrimethoxysilane as coupling agent to obtain the silica-gel immobilized ionic liquid(IL3). The IL3 was characterized by SEM, FTIR, TG, 13C-NMR, BET, and titration its surface acidity. Its catalytic performance in the synthesis of 5-hydroxymethylfurfural (HMF) from fructose dehydration was investigated. The results indicate that 1-H-3-(3-sulfonic acid)propylimidazolium chloride could be immobilized on micro-ball silica-gel surface, and the IL3 was a good catalyst for the HMF synthesis from fructose dehydration. The yield of HMF is up to 82.1%, using 45.4-IL3 as the catalyst, with ethylene glycol monomethyl ether(EGME) as solvent at 115℃ over 5h. The used IL3 could be reused conveniently. But the yield of HMF dropped gradually with the more times of the IL3 recycled. After the IL3 reused four times, the yield of HMF decreased from 82.1% to 53.0%.

Synthesis of 5-hydroxymethylfurfural (HMF) by ..

A Facile and Eco-Effective Catalytic System for Synthesis of 5-Hydroxymethylfurfural from Glucose

Process for the synthesis of 5-hydroxymethylfurfural …

Although producing 2,5-dimethylfuran (DMF) from 5-hydroxymethylfurfural (HMF) is an attractive way to synthesize renewable fuels, achieving high yields for this reaction has proved difficult. PtCo bimetallic nanoparticle catalysts embedded in hollow carbon nanospheres now show improved catalytic performance for the hydrogenolysis of HMF to DMF (98% yield after 2 hours).

method for synthesis of hydroxymethylfurfural from sucrose

Obtaining HMF from glucose is, however, difficult because the direct synthesis of HMF from glucose usually proceeds in two steps. First, the isomerization of glucose to fructose occurs in the presence of enzyme, base, or metal chloride (Huang et al. 2010; Peng et al. 2012; Song et al. 2013; van Putten et al. 2013). Next, the fructose is dehydrated in the presence of an acid catalyst (H+) to yield HMF. The two-step process for producing HMF from glucose results in a low selectivity of HMF and a high amount of humins. Hence, the ideal strategy for the catalytic conversion of glucose into HMF requires a bifunctional catalyst that would affect both the isomerization of glucose to fructose and the subsequent dehydration of fructose. In recent years, a series of novel bifunctional catalysts have been synthesized, such as N,N‘-dimethylformamide (DMF), which combines Amberlyst-15 (a solid acid) and Mg–Al hydrotalcite (a solid base) for the one-pot synthesis of HMF from glucose (Takagaki et al. 2009). An HMF selectivity of 58% and a glucose conversion of 73% was achieved at 180 °C. In this catalytic system, the base acted as the catalyst for isomerizing the glucose into fructose, and the acid was the catalyst for dehydrating the fructose into HMF. In another instance, Cao et al. (2015) used an ammonium resin (PBnNH3Cl) as a single catalyst for the glucose and polysaccharide dehydration into HMF, with high selectivity (> 80%). This example demonstrated, through decomposing ammonium resin under the high reaction temperature, that the in situ formation of –NH2 (PBnNH2) and H+ (HCl) could act as both the isomerizing agent for glucose and the acid catalyst for the dehydration of fructose. However, the procedures for preparing bifunctional catalysts are tedious and cumbersome, although these catalysts display high catalytic performance and recyclability, and using a commercially available commodity as the bifunctional catalyst would be preferred.

Method for the Synthesis of 5-Hydroxymethylfurfural …
PhD Oral Defense: Sustainable synthesis of 5-hydroxymethylfurfural and levulinic acid

5-hydroxymethyl furfural 67-47-0 - The Good Scents …

and (2014) Synthesis of terephthalic acid via Diels-Alder reactions with ethylene and oxidized variants of 5-hydroxymethylfurfural. Proceedings of the National Academy of Sciences of the United States of America, 111 (23). pp. 8363-8367. ISSN 0027-8424. PMCID PMC4060660.

Effect of zeolite catalyst on sugar dehydration for 5-Hydroxymethylfurfural synthesis

Introduction of Academic Staff - DICP

AB - Synthesis of 5-hydroxymethylfurfural (5-HMF) from glucose in water-dimethyl sulfoxide diphasic system using solid base ZrO2 and SO42-/TiO2-SiO2 catalysts was studied. The effects of calcining temperature, Ti/Si ratio in SO42-/TiO2-SiO2, catalyst dosage, and mass ratio of ZrO2 and SO42-/TiO2-SiO2 mixture on 5-HMF yield were evaluated. Both the base and acid catalyst exhibited best performance when calcined at 450°C. The optimal Ti/Si ratio was found to be 4:1. ZrO2 and SO42-/TiO2-SiO2 mixture worked much better than ZrO2 or SO42-/TiO2-SiO2 alone. The optimal catalyst dosage was found to be 20% of the glucose amount (w). Instrumental characterization of the catalysts indicate that mild base and acid sites are suitable for conversion of glucose to 5-HMF, and the base and acid catalysts in the mixture do not interact chemically to a noticeable extend that influences the functionality. The water-organic diphasic system proved to be efficient in catalytic transformation of glucose to 5-HMF.

A Facile and Eco-Effective Catalytic System for Synthesis of 5-Hydroxymethylfurfural from Glucose

Molecules, an international, peer-reviewed Open Access journal.

A facile and eco-friendly system for synthesis of 5-hydroxymethylfurfural (HMF) from glucose has been investigated with the catalyst dihydric phosphate (H2PO4) in a methyl isobutyl ketone (MIBK)/H2O biphasic system. The results showed that the catalyst dosage, reaction temperature, and reaction time had noticeable effects on glucose conversion and the HMF yield; more than 50% yield of HMF was achieved at the optimum conditions. In addition, this catalytic system was broadly substrate-tolerant; a satisfactory HMF yield was obtained from higher substrate concentrations and complex substrates. Furthermore, this efficient catalyst was recycled up to nine consecutive times without the loss of catalytic activity.