Catalytic Hydrolysis of Ethyl Acetate using Cation Exchange Resin (Amberlyst - 15) : A Kinetic Study

Ayyappan, K.R.; Toor, Amrit Pal; Gupta, Ritu; Bansal, Ajay; Wanchoo, K.

doi:10.9767/bcrec.4.1.22.16-22

Cited by 5 publications

(10 citation statements)

References 9 publications

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“…These values are within the similar range of reported activation energies for ethyl acetate hydrolysis, 30-70 KJ/mol. 64,75,80,81 Moreover, these values are within the range of the activation energy values reported for ethyl acetate hydrolysis by H 2 SO 4 aqueous solutions at the same reaction system and reaction conditions, reported 39.6 KJ/mol. 64 So, the catalysts have similar activities and activation energies as found for hydrolysis in a homogenous reaction medium.…”

Section: Effect Of Reaction Temperature On the Tpa Yieldsupporting

confidence: 80%

“…This showed that in homogeneous reaction medium, these acids have similar activities, same as reported for ethyl acetate hydrolysis for H 2 SO 4 . 64,75,80,81 While the enthalpy of adsorption was not determined, the higher activity of these catalysts was evidenced by PET surface wetting 64 and determination of octanol/water partition coefficients. 68 Contact angle measurements revealed better wetting of the PET surface, which has a positive effect on higher efficiency of these catalysts for PET hydrolysis.…”

Section: Discussionmentioning

confidence: 99%

“…The catalyst H + content was subtracted from the total H + to determine the amount of acetic acid produced. Afterwards, the reaction rate constants and the activation energies were calculated and compared 64,75 …”

Section: Methodsmentioning

confidence: 99%

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Aryl sulfonic acid catalysts: Effect of pendant group structure on activity in hydrolysis of polyethylene terephthalate

Abedsoltan

Coleman

2022

J of Applied Polymer Sci

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A series of aryl sulfonic acids were tested as catalysts for acid hydrolysis occurring at the surface of poly(ethylene) terephthalate (PET) particles. Specifically, p‐toluenesulfonic acid monohydrate (PTSA), 2‐naphthalenesulfonic acid (2‐NSA), and 1,5‐naphthalenedisulfonic acid tetrahydrate (1,5‐NDSA) were chosen to provide sulfonic acid active groups and varying hydrophobic functionality. The effect of catalyst concentration and reaction temperature on PET hydrolysis rate was studied. The aryl sulfonic acid catalysts exhibited much higher rates of PET hydrolysis than the mineral acid, H2SO4. At 150°C and 4 M catalyst, the time required to achieve more than 90% TPA yield was 3, 3, and 8 h, and 18 h for (PTSA), (2‐NSA), (1,5‐NDSA), and H2SO4, respectively. Ethyl acetate hydrolysis was performed as a model reaction to probe the activity of the catalysts in homogenous reactions to compare with the heterogenous hydrolysis reaction occurring at the PET surface. The higher catalytic activities for PET hydrolysis of the PTSA, 2‐NSA, and 1,5‐NDSA than H2SO4 was attributed to improved wetting by the reaction media and affinity of the aryl sulfonic acid catalysts for the PET surface.

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Section: Effect Of Reaction Temperature On the Tpa Yieldsupporting

confidence: 80%

Section: Discussionmentioning

confidence: 99%

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Aryl sulfonic acid catalysts: Effect of pendant group structure on activity in hydrolysis of polyethylene terephthalate

Abedsoltan

Coleman

2022

J of Applied Polymer Sci

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“…Reaction enthalpy ( H ) and reaction entropy (S ) for forward reaction were obtained from Equation (6) by plotting ln K against 1000/T [7]. (6) Where K = equilibrium constant, R = universal gas constant. The positive value of enthalpy suggests that the esterification reaction is endothermic in nature.…”

Section: Effect Of Temperaturementioning

confidence: 99%

“…investigated. Typical homogenous catalysts like H2SO4, HCl and ClSO3OH are used but due to their miscibility with the reaction medium, separation becomes a problem, hence ion exchange resins are preferred over homogeneous acids due to ease of product separation and catalyst recovery [6]. The drive to develop green processes has led to the development of solid acid catalysts to a significant increase in research activities both in academic and industrial sections.…”

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confidence: 99%

Ion-exchange Resin Catalyzed Esterification of Lactic Acid with Isopropanol: a Kinetic Study

Toor

Sharma

Thakur

et al. 2011

Bull. Chem. React. Eng. Catal.

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The kinetic behavior of esterification of lactic acid with isopropanol over an acidic cation exchange resin, Amberlyst 15, was studied under isothermal condition. Isopropyl lactate synthesized in this reaction is an important pharmaceutical intermediate. The experiments were carried out in a stirred batch reactor in the temperature range of 323.15 to 353.15 K. The effect of various parameters such as temperature, molar ratio and catalyst loading was studied. Variation in parameters on rate of reaction demonstrated that the reaction was intrinsically controlled. Kinetic modeling was performed using Eley-Rideal model which acceptably fits the experimental data. The activation energy was found to be 22.007 kJ/mol and frequency factor was 0.036809 l2 g-1 mol-1 min-1 for forward reaction. The value of entropy for the forward reaction was found to be 182.317 J K-1 mol-1 . © 2011 BCREC UNDIP. All rights reserved

(Received: 19th January 2011, Revised: 16th March 2011; Accepted: 16th March 2011)

[How to Cite: A.P. Toor, M. Sharma, S. Thakur, and R. K. Wanchoo. (2011). Ion-exchange Resin Catalyzed Esterification of Lactic Acid with Isopropanol: a Kinetic Study. Bulletin of Chemical Reaction Engineering and Catalysis, 6(1): 39-45. doi:10.9767/bcrec.6.1.791.39-45]

[How to Link / DOI: http://dx.doi.org/10.9767/bcrec.6.1.791.39-45 ]

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Liquid Phase Esterification of Acrylic Acid with Isobutyl Alcohol Catalyzed by Different Cation Exchange Resins

Karakuş

Sert

Buluklu

et al. 2014

Ind. Eng. Chem. Res.

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The esterification reaction of acrylic acid with isobutyl alcohol in the presence of ion exchange resins, Amberlyst 15, Amberlyst 131, and Dowex 50wX-400, has been studied. According to experimental results, Amberlyst 131 was a more effective catalyst compared with the other ion exchange resins. The effects of catalyst loading, stirrer speed, initial alcohol to acid molar ratio, and temperature on the conversion of acrylic acid were investigated. The experimental data were tested by using Pseudohomogeneous, Eley−Rideal and Langmuir−Hinshelwood−Haugen−Watson models. The nonideality of the reaction medium was taken into account by using activities instead of concentrations. The activity coefficients were calculated using the UNIQUAC group contribution method. The activation energy and kinetic and adsorption constants were determined according to the model representing the dual site adsorption, which comprises the data with minimum error.

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Catalytic Hydrolysis of Ethyl Acetate using Cation Exchange Resin (Amberlyst - 15) : A Kinetic Study

Cited by 5 publications

References 9 publications

Aryl sulfonic acid catalysts: Effect of pendant group structure on activity in hydrolysis of polyethylene terephthalate

Aryl sulfonic acid catalysts: Effect of pendant group structure on activity in hydrolysis of polyethylene terephthalate

Ion-exchange Resin Catalyzed Esterification of Lactic Acid with Isopropanol: a Kinetic Study

Liquid Phase Esterification of Acrylic Acid with Isobutyl Alcohol Catalyzed by Different Cation Exchange Resins

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