Solventless ketalization of glycerol to solketal with acetone over the ionic liquid [P(C4H9)3C14H29][TsO]

Ji, Yu; Zhang, Tengda; Gui, Xiahui; Shi, HaiJian; Liu, Yang

doi:10.1016/j.cjche.2019.07.019

Cited by 17 publications

(14 citation statements)

References 34 publications

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“…As the water content increases, equilibrium conversion decreases, and the negative effect of water is greater for lower A/G molar ratios. For example, at 293 K and 10 wt % water, equilibrium ) Present work Nanda [5] Moreira [6] Cornejo [7] Vannucci [15] Ji [16] [26]. These results are similar to those obtained in this work, which are presented in Fig.…”

Section: Determination Of Equilibrium Compositions and Glycerol Conversionsupporting

confidence: 89%

“…In addition, the results calculated in this work are compared with those experimentally obtained by other authors who carried out the experiments until no changes were observed in the bulk composition to ensure the pseudo-equilibrium state of the reaction. The value of the equilibrium constant K a s is similar to those obtained by authors who considered the liquid phase as nonideal [6,15,16]. Furthermore, this value differs considerably from those obtained by Nanda et al [5] and Cornejo et al [7], who considered the liquid phase as ideal.…”

Section: Chemical Equilibrium Constant Under Standard Conditionssupporting

confidence: 82%

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Thermodynamic Assessment of Chemical Equilibrium for the Synthesis of Solketal in the Liquid Phase

2021

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The synthesis of solketal is one of the innovative routes of glycerol valorization to value-added products, and the simulation of the process requires the knowledge of thermodynamic properties that are not still available in the literature. In this work, the specific heat capacity as a function of temperature and the enthalpy and entropy of formation of all compounds involved in the reaction were calculated by employing a second-order group-additivity method. Expressions for the enthalpy of reaction and equilibrium constant as a function of temperature were also obtained. The glycerol conversion at equilibrium was calculated at different temperatures, pressures, acetone/glycerol molar ratios, and initial water contents, considering the nonideality of the liquid phase.

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Section: Determination Of Equilibrium Compositions and Glycerol Conversionsupporting

confidence: 89%

Section: Chemical Equilibrium Constant Under Standard Conditionssupporting

confidence: 82%

Thermodynamic Assessment of Chemical Equilibrium for the Synthesis of Solketal in the Liquid Phase

2021

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“…In fact, the utility of HPA for the acetalization of glycerol has been well-established in the literature 54,55 . Considering these results and previous reports 56, 57 , it can be suggested that in the course of the reaction, glycerol can be encapsulated in the pores of HR/Y-F127. This issue, known as con nement effect, is bene ciary for the catalysis.…”

Section: Recyclability Of Hr/y-f127-il-hpmosupporting

confidence: 86%

Highly efficient glycerol acetalization to solketal over Keggin type heteropolyacid supported on ionic liquid decorated hierarchical faujasite zeolite, prepared through a novel approach

Tarighi

Sadjadi

Delangiz

2022

Preprint

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To handle huge amount of glycerol produced in biodiesel industry, glycerol is transformed to value-added products. In this regard, glycerol acetalization to solketal is industrially attractive. As in this process various by-products can be formed, designing highly selective catalysts is of great importance. In this line, we wish to report a novel catalyst that benefits from strong acidity, high specific surface area and thermal stability, which can selectively form solketal in glycerol acetalization. To prepare the catalyst, hierarchical zeolite was prepared via a novel method, in which partially delaminated NaY was treated with Pluronic®F-127 and then reacted with NH4NO3 to furnish the H-form zeolite. Hierarchical faujasite was then achieved through calcination and template removal. Subsequently, it was functionalized with ionic liquid and used for the immobilization of heteropolyacid. The results indicated the importance of the mesoprosity of zeolite and the presense of ionic liquid functionality for achiveing high solketal yield. Moreover, among three investigated heteropolyacids, phosphomolybdic acid exhibited the highest catalytic activity. In fact, using 10 wt.% catalyst at 55°C and glycerol to acetone molar ratio of 1: 20, solketal with yield of 98% was furnished under solvent-less condition. Besides, the catalyst was recyclable with low leaching of heteropolyacid.

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“…Also, they recovered and reused the catalyst 4 times without loss of activity. [125] In 2020, Ji et al [126] used a phosphonium ionic liquid salt (TTPS). They found that at 30 °C, with molar ratio acetone: glycerol of 2 : 1 and a catalyst loading of 5 % wt.…”

Section: Ketalization Of Glycerolmentioning

confidence: 99%

Catalysis for Oleochemical Platforms

et al. 2023

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The present review articles the most recent efforts, made in the Department of Chemical Sciences of the University of Naples Federico II, in the catalytic treatment of biomasses derived from vegetable oils. The review is focused on several technologies aimed at the production of either biofuels or valuable chemicals: (i) biodiesel production; (ii) esterification to obtain high‐added value products; (iii) epoxidation of vegetable oils; (iv) glycerol ketalization; (v) oxidative cleavage of unsaturated fatty acids. The results are critically summarized to highlight the scientific activities and the main results in the field of biorefinery concept.

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Solventless ketalization of glycerol to solketal with acetone over the ionic liquid [P(C4H9)3C14H29][TsO]

Cited by 17 publications

References 34 publications

Thermodynamic Assessment of Chemical Equilibrium for the Synthesis of Solketal in the Liquid Phase

Thermodynamic Assessment of Chemical Equilibrium for the Synthesis of Solketal in the Liquid Phase

Highly efficient glycerol acetalization to solketal over Keggin type heteropolyacid supported on ionic liquid decorated hierarchical faujasite zeolite, prepared through a novel approach

Catalysis for Oleochemical Platforms

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