Kinetics of the esterification between lactic acid and isoamyl alcohol in the presence of silica gel‐supported sodium hydrogen sulphate

Jiang, Zhongkai; Xu, Jumei; Zeng, Zuoxiang; Xue, Weilan; Li, Shating

doi:10.1002/cjce.23127

Cited by 6 publications

(11 citation statements)

References 37 publications

(27 reference statements)

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“…Isoamyl dl -lactate (CAS 19329-89-6), colorless and transparent, is a green solvent widely used in the food, coating, petroleum, and medical industries. , It can be obtained by esterification of lactic acid and isoamyl alcohol, , and its boiling point at normal pressure is 475.55 K, which was obtained from Syracuse Research Corporation of Syracuse. Unfortunately, there is only one literature source revealing that the boiling point of isoamyl dl -lactate is 369.15–373.15 K at 23 Torr, and the thermodynamic properties have not been studied so far.…”

Section: Introductionmentioning

confidence: 99%

Heat Capacity, Density, Vapor Pressure, and Enthalpy of Vaporization of Isoamyl dl-Lactate

Zeng

et al. 2019

J. Chem. Eng. Data

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The density and the heat capacity at saturation vapor pressure of isoamyl dl-lactate were measured at a temperature range of 288.15–453.65 K using a capillary pycnometer and adiabatic calorimeter, respectively. The Antoine equation was used to correlate the vapor pressure data which was determined with an ebulliometric technique at a temperature range of 374.59–478.56 K, and the deviation between the calculated value and the experimental data was less than 0.87%. On the basis of the Clausius–Clapeyron equation, the vaporization enthalpy of isoamyl dl-lactate at atmospheric pressure boiling point (T b, 474.89 K) was calculated to be 43.27 kJ/mol. According to the Othmer’s method, the standard vaporization enthalpy, Δvap H (298.15 K) was estimated using octanol and heptanol as reference substances, and the results are 57.21 and 57.35 kJ/mol, respectively.

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Section: Introductionmentioning

confidence: 99%

Heat Capacity, Density, Vapor Pressure, and Enthalpy of Vaporization of Isoamyl dl-Lactate

Zeng

et al. 2019

J. Chem. Eng. Data

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“…In our previous work, we designed a novel efficient catalyst for the esterification of lactic acid with isoamyl alcohol, and as the first step of RD process development, we also studied the reaction kinetics of esterification. 15 For the proper design of a RD column, the thermodynamic properties such as multicomponent vapor− liquid equilibrium (VLE) are required.…”

Section: Introductionmentioning

confidence: 99%

“…Removal of water (aqueous layer) from the azeotropic composition and recycling back the alcohol through the organic layer to the reaction mixture leads to an enhancement in the conversion. In our previous work, we designed a novel efficient catalyst for the esterification of lactic acid with isoamyl alcohol, and as the first step of RD process development, we also studied the reaction kinetics of esterification . For the proper design of a RD column, the thermodynamic properties such as multicomponent vapor–liquid equilibrium (VLE) are required.…”

Section: Introductionmentioning

confidence: 99%

Isobaric Vapor–Liquid Equilibrium for Binary System of Isoamyl dl-Lactate and Isoamyl Alcohol at 25.0, 50.0, and 101.3 kPa

Zeng

2019

J. Chem. Eng. Data

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Isobaric vapor–liquid equilibrium (VLE) data for the binary system of isoamyl dl-lactate and isoamyl alcohol were measured at 25.0, 50.0, and 101.3 kPa in a modified Rose equilibrium still. The mixtures do not represent azeotropes. The determined experimental data were checked by Wisniak and van Ness tests to verify their thermodynamic consistency. Meanwhile, the Wilson, NRTL, and UNIQUAC models are adopted to correlate the VLE data, and the parameters of the three models were regressed. The UNIQUAC model showed the best fit to the experimental values relative to the Wilson and NRTL models, and it had the lowest root-mean-square deviations of equilibrium temperature (T) and mole fraction of the vapor phase (y 1), with the value of 1.54 K and 0.0234, respectively.

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“…Heterogeneously catalyzed esterification takes place in the manner of adsorption of one or both of the reactants on the surface of catalyst, reaction on the surface sites, and desorption of the product from the surface of catalyst 28 . This mechanism can be described by the P‐H model, E‐R model, and L‐H model.…”

Section: Methodsmentioning

confidence: 99%

“…The L‐H model assumes that all the reactant molecules get adsorbed on the surface of catalyst where the reaction takes place, whereas the E‐R model assumes that the reaction takes place between adsorbed and unadsorbed molecules of the reactants. The reaction mechanisms for P‐H and L‐H models are reported in the literature 28,29 …”

Section: Methodsmentioning

confidence: 99%

Kinetics of catalyzed esterification of acetic acid with n‐butanol using carbonized agro‐waste

Bhusari

Mazumdar

Rathod

et al. 2020

Int J of Chemical Kinetics

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The objective of this research work was to investigate the kinetics of esterification of acetic acid with n-butanol through the variation of experimental parameters. The reaction mixture was catalyzed heterogeneously by a sulfonated catalyst in batch mode of operation. The catalyst was prepared from abundantly available agro-waste, Cajanus cajan husk by chemical activation process, which produces a carbon-based solid catalyst with high surface area. The catalyst was characterized by a Brunauer-Emmet-Teller surface analyzer and Fourier transform infrared spectroscopy to know the surface morphology. Process parameters such as contact time, reaction temperature, and catalyst loading, which can influence the extent of conversion of reactants, were studied. Furthermore, the kinetic investigation was also carried out to estimate the kinetic parameters for uncatalyzed and catalyzed reaction using the second-order pseudohomogeneous (P-H), Eley-Rideal (E-R), and Langmuir-Hinshelwood (LH) kinetic models for this research work. The kinetic parameters such as activation energy, preexponential factor, and the thermodynamic parameters such as enthalpy and entropy were estimated for uncatalyzed and catalyzed reactions using these three models. The process conditions were optimized for catalyzed and uncatalyzed reactions to obtain the maximum product yield by minimizing root mean square error of each experimental data using the MS-excel solver tool. Thus, this study reveals the high potential of an agro-waste, Cajanus cajan husk as raw material for the synthesis of catalyst. The results show that the E-R model is more appropriate for predicting the dynamic data of an esterification reaction, as the forward rate of reaction estimated using the E-R model are more modified than P-H and L-H models. K E Y W O R D Scatalyst, conversion, esterification, heterogeneous, kinetics 450

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Kinetics of the esterification between lactic acid and isoamyl alcohol in the presence of silica gel‐supported sodium hydrogen sulphate

Cited by 6 publications

References 37 publications

Heat Capacity, Density, Vapor Pressure, and Enthalpy of Vaporization of Isoamyl dl-Lactate

Heat Capacity, Density, Vapor Pressure, and Enthalpy of Vaporization of Isoamyl dl-Lactate

Isobaric Vapor–Liquid Equilibrium for Binary System of Isoamyl dl-Lactate and Isoamyl Alcohol at 25.0, 50.0, and 101.3 kPa

Kinetics of catalyzed esterification of acetic acid with n‐butanol using carbonized agro‐waste

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