Action des alcalis sur les sucres, II. <i>Transformation réciproque des uns dans les autres des sucres glucose, fructose et mannose</i>

Bruyn, C. A. Lobry de; Ekenstein, W. Alberda van

doi:10.1002/recl.18950140703

Cited by 133 publications

(33 citation statements)

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“…The lower amount of fructose compared with glucose found at 160 °C ( Figure 4 ) implied that glucose was converted to HMF via isomerization to fructose by a reversible keto-enol tautomerism, as found by Lobry de Bruyn and Alberda van Ekenstein [ 58 ]. On the other hand, Li et al [ 59 ] proposed that the catalytic conversion of glucose to fructose occurs via an enediol intermediate, which then forms fructose and finally builds HMF (Pathway I in Figure 6 ) or can directly dehydrate to HMF (Pathway II).…”

Section: Resultsmentioning

confidence: 99%

Hydrothermal Conversion of Spent Sugar Beets into High-Value Platform Molecules

et al. 2020

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The growing importance of bio-based products, combined with the desire to decrease the production of wastes, boosts the necessity to use wastes as raw materials for bio-based products. A waste material with a large potential is spent sugar beets, which are mainly used as animal feeds or fertilizers. After hydrothermal treatment, the produced chars exhibited an H/C ratio of 1.2 and a higher heating value of 22.7 MJ/kg, which were similar to that of subbituminous coal and higher than that of lignite. Moreover, the treatment of 25 g/L of glucose and 22 g/L of fructose by heating up to 160 °C led to a possible application of spent sugar beets for the production of 5-hydroxymethylfurfural. In the present study, the maximum concentration of 5-hydroxymethylfurfural was 3.4 g/L after heating up to 200 °C.

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Section: Resultsmentioning

confidence: 99%

Hydrothermal Conversion of Spent Sugar Beets into High-Value Platform Molecules

et al. 2020

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“…However, this technique general suffers from many drawbacks, such as high enzyme cost, long reaction time and irreversible catalyst deactivation . In 1895, de Bruyn, CA and Van Ekenstein, W Alberda found that glucose could be selectively converted into fructose in the presence of an inorganic alkali . This finding suggests that the isomerization of glucose with a chemical catalyst is feasible.…”

Section: Methodsmentioning

confidence: 99%

Glucose Isomerizes to Fructose Catalyzed by the Eco‐Friendly and Biodegradable Ionic Liquids

Xiong

et al. 2019

ChemistrySelect

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In this study, a new and cost-effective strategy is proposed for the selective isomerization of glucose to fructose in the aqueous solutions involving eco-friendly and biodegradable ionic liquids, which consist of a choline cation and natural amino acid anions. The results show that these ionic liquid aqueous solutions demonstrate impressive performances on the glucose isomerization. At the reaction conditions of 70°C for 30 min and 1.0 MPa N 2 , a 37.6% fructose yield is obtained with a 77.2% selectivity in the presence of choline proline. It is noteworthy that both of these fructose yield and selectivity are higher than those of many current base-catalyzed techniques. This high performance should be ascribed to the intensive enhancement of choline cation on the catalytic active centre of proline anion which consequentially facilitates the isomerization of glucose. Furthermore, this robust catalyst of [Ch]Pro is recyclable, where a satisfied catalytic activity is shown even after five consecutive runs, indicating its great potential in both biomass valorization and food industry.

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“…The first step in developing a model is to determine the rate constant ( k , ) for the first reaction for a first order reaction model corresponding to eqn. (1). However, the time needed to reach isothermal conditions was about 10-12 min.…”

Section: Hl Ilsmentioning

confidence: 99%