Sucrose Decomposition in Aqueous Solution, and Losses in Sugar Manufacture and Refining

Clarke, M. A.; Edye, L. A.; Eggleston, Gillian

doi:10.1016/s0065-2318(08)60095-5

Cited by 71 publications

(52 citation statements)

References 33 publications

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“…Even if acids are far less effective catalysts than bases, enolization and isomerization of sugars occurs [30,31,35,36]. We simply implemented the isomerization of glucose to fructose in our model because in other works [37][38][39], the reverse reaction from fructose to glucose was reported negligible.…”

Section: Reaction Modelmentioning

confidence: 99%

Sucrose Is a Promising Feedstock for the Synthesis of the Platform Chemical Hydroxymethylfurfural

et al. 2018

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Hydroxymethylfurfural (HMF) has an outstanding position among bio-based platform chemicals, because high-value polymer precursors and fuel additives can be derived from HMF. Unfortunately, the large-scale industrial production of HMF is not yet realized. An open research question is the choice of hexose feedstock material. In this study, we used the highly available disaccharide sucrose for HMF synthesis. The conversion of sucrose was catalyzed by sulfuric acid in water media. Experiments were conducted at temperatures of 180, 200, and 220 • C with reaction times of 2-24 min. A carbon balance showed that the yield of unwanted side products rose strongly with temperature. We also developed a kinetic model for the conversion of sucrose, involving nine first-order reactions, to uncover the kinetics of the main reaction pathways. Within this model, HMF is produced exclusively via the dehydration of fructose. Glucose isomerizes slowly to fructose. Side products arise simultaneously from glucose, fructose, and HMF. A pathway from hexoses to xylose via reverse aldol reaction was also included in the model. We believe that sucrose is the ideal feedstock for large-scale production of HMF because it is more abundant than fructose, and easier to process than sugars obtained from lignocellulosic biomass.

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Section: Reaction Modelmentioning

confidence: 99%

Sucrose Is a Promising Feedstock for the Synthesis of the Platform Chemical Hydroxymethylfurfural

et al. 2018

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“…However, neither the density nor viscosity of CAS-H 2 O and MAS-H 2 O was significantly affected by the hydrolysis reaction (Figure 8). Nevertheless, sugar hydrolysis was not observed in other NADESs that consist of sucrose such as in the neutral NADES type, FS-H 2 O, although sucrose hydrolysis also occurs at very concentrated sucrose solution even at neutral pH [42].…”

Section: Hnuclear Overhauser Enhancement Spectroscopy (Noesy) It Revmentioning

confidence: 88%

“…The pH of both CAS-H 2 O and MAS-H 2 O is two (measured at 10x dilution with Aquadest). The caramelization reaction is the hydrolysis of sucrose by protonation of the glycosidic linkage [42]. Though the extraction process was only heated at 40°C, the effect of acidic condition is comparable with the effect of heating at high temperature at neutral pH [43].…”

Section: Hnuclear Overhauser Enhancement Spectroscopy (Noesy) It Revmentioning

confidence: 99%

Green Separation of Bioactive Natural Products Using Liquefied Mixture of Solids

Zullaikah¹,

Rachmaniah²,

Utomo³

et al. 2018

Green Chemistry

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Bioactive natural products are secondary metabolites of plants and animals generated through various biological pathways. They are the main sources of new drugs, functional food and food additives. Since their contents in plant and animal tissues are extremely small compared to those of primary metabolites, the separations of bioactive principles from complex matrixes are often the inherent bottleneck in the utilization of bioactive natural products. A novel separation technique based on a liquefied mixture of solids at its eutectic compositions is presented in this chapter. The mixture can be prepared from natural primary metabolites and therefore can be considered as a green solvent. The separation of bioactive compounds (γ-oryzanol) from rice bran oil-based biodiesel using green methods with minimum energy requirement is discussed. Other applications for separations of alkaloid and phenolic compounds from their plant matrices are also presented. Different raw materials require different separation techniques due to the presence of different impurities, and the current trend is to use green methods with minimum energy requirement. This overview of recent technological advances, discussion of pertinent problems and prospect of current methodologies in the separation of bioactive natural products may provide a driving force for the development of novel separation techniques.

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“…Such degradation is possible at pH greater than 8.3 at the moderate storage temperatures. Clarke et al, Kelly and Brown and others have discussed mechanisms for both acid and alkaline degradation of sucrose and invert (10,11). de Bruijn has discussed alkaline degradation of monosaccharides and the production of color in numerous articles (12)(13)(14).…”

Section: --Ic Purity Vs Rds Temperature In Trial IIImentioning

confidence: 99%

Chemical markers or signals for determination of storability of chromatographic separator extract

McGillivary¹,

Rheault²,

Heggeness³

et al. 2009

Proceedings of 35th Biennial Meeting

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Sucrose Decomposition in Aqueous Solution, and Losses in Sugar Manufacture and Refining

Cited by 71 publications

References 33 publications

Sucrose Is a Promising Feedstock for the Synthesis of the Platform Chemical Hydroxymethylfurfural

Sucrose Is a Promising Feedstock for the Synthesis of the Platform Chemical Hydroxymethylfurfural

Green Separation of Bioactive Natural Products Using Liquefied Mixture of Solids

Chemical markers or signals for determination of storability of chromatographic separator extract

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