Reaction kinetics of lactic acid with methanol catalyzed by acid resins

Choi, Jong Il; Hong, Won Hi; Chang, Ho Nam

doi:10.1002/(sici)1097-4601(1996)28:1<37::aid-kin5>3.0.co;2-n

Cited by 42 publications

(31 citation statements)

References 5 publications

(7 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…From Figure , the temperature has a slightly negative effect on the IBOH equilibrium conversion because the IBIBE esterification is exothermic reaction. Nevertheless, nearly equal IBOH conversions are reached at equilibrium, which has also been discovered by other authors . This behavior can be interpreted by the relatively small standard enthalpy of esterification so that the chemical equilibrium constant is originally temperature independent.…”

Section: Resultssupporting

confidence: 79%

Bifunctional imidazole‐PTSA deep eutectic solvent for synthesizing long‐chain ester IBIBE in reactive extraction

et al. 2018

View full text Add to dashboard Cite

The traditional production of long‐chain organic esters like isobutyl isobutyrate (BIBE) suffers from severe problems due to the homogenous catalyst in process and complex system thermodynamics. In this work, an innovative bifunctional deep eutectic solvent (DES) is introduced, playing as both reaction catalyst and extraction solvent, to intensify the esterification process. The DES was formed by imidazole (Im) and p‐toluenesulfonic acid (PTSA), which was for the first time found acid–base tunable, represented by weak basic DES [3Im:PTSA] and strong acidic DES [Im:2PTSA]. The formation mechanisms of [3Im:PTSA] and [Im:2PTSA] were illustrated by Fourier‐transform infrared spectroscopy (FTIR) and COnductor‐like Screening MOdel for Real Solvent (COSMO‐RS) combined with the Im‐PTSA phase diagram. The dual functions of the acidic [Im:2PTSA] in reactive extraction were evaluated by σ‐potential analysis and esterification experiments. The high conversion, easy product separation, and good solvent reusability confirm the excellent catalytic and solvent effect of [Im:2PTSA]. © 2018 American Institute of Chemical Engineers AIChE J, 65: 675–683, 2019

show abstract

Section: Resultssupporting

confidence: 79%

Bifunctional imidazole‐PTSA deep eutectic solvent for synthesizing long‐chain ester IBIBE in reactive extraction

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Several investigators have explored only the kinetics of LA esterification with methanol in the past (Choi et al, 1996;Seo and Hong, 2000;Sanz et al, 2002;Kumar et al, 2006b;andJiang et al, 2010. Sanz et al (2004) A quasi-homogeneous (QH) activity (a i = γ i x i ) based on kinetic model is used and can be written as:…”

Section: The ML Kinetic Modelmentioning

confidence: 99%

Methyl lactate synthesis using batch reactive distillation: Operational challenges and strategy for enhanced performance

Aqar

Rahmanian

Mujtaba

2016

Separation and Purification Technology

View full text Add to dashboard Cite

Link to original published version: http: //dx.doi.org/10.1016/j.seppur.2015.12.023 Citation: Aqar DY, Rahmanian N and Mujtaba IM (2016) Methyl lactate synthesis using batch reactive distillation: Operational challenges and strategy for enhanced performance. Separation and Purification . AbstractBatch reactive distillation is well known for improved conversion and separation of desired reaction products. However, for a number of reactions, the distillation can separate the reactants depending on their boiling points of them and thus not only reduces the benefit of the reactive distillation but also offers operational challenges for keeping the reactants together. Methyl lactate (ML) synthesis via the esterification of lactic acid (LA) with methanol in a reactive distillation falls into this category and perhaps that is why this process has not been explored in the past. The boiling points of the reactants (LA, methanol) are about 490 K and 337 K while those of the products (ML, water) are 417 K and 373 K respectively. Clearly in a conventional reactive distillation (batch or continuous) methanol will be separated from the LA and will reduce the conversion of LA to ML significantly.Here, first the limitations of the use of conventional batch distillation column (CBD) for the synthesis of ML is investigated in detail and a semi-batch reactive distillation (SBD) configuration is studied in detail where LA is the limiting reactant and methanol is continuously fed in excess in the reboiler allowing the reactants to be together for a longer period. However, this poses an operational challenge that the column has to be carefully controlled to avoid overflow of the reboiler at any time of the operation. In this work, the performance of SBD for the synthesis of ML is evaluated using model based optimization in which operational constraints are embedded. The results clearly demonstrate the viability of the system for the synthesis of ML.

show abstract

“…In the presence of Dowex 50 W resins, different results were also recorded for the esterification of lactic and salisilic acids with methanol (Choi et al, 1996;Bochner et al, 1965). Furthermore, in the presence of Amberlyst-15, the esterification of acrylic and lactic acids with butanol showed that the total change was controlled by the surface reaction and alcohol and water had an inhibition effect on the reaction rate (Darge and Thyrion, 1993;Dassy et al, 1994).…”

Section: Introductionmentioning

confidence: 97%

“…Also, the catalyst can be easily removed and recycled from the reaction product by decantation in columns (Choi et al, 1996;Matouq and Goto, 1993;Liu et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Determination of Adsorption and Kinetic Parameters for Synthesis of Isobutyl Acetate Catalyzed by Amberlite Ir-122

Izci

Uyar

Izci

2008

Chemical Engineering Communications

View full text Add to dashboard Cite

In the present study, the kinetics of esterification of acetic acid with isobutanol was studied by using Amberlite IR-122 as an acid catalyst. Experiments were carried out in a stirred batch reactor in dioxane at different temperatures (323 to 348 K) under atmospheric pressure. The equilibrium constant was found to be constant as 4 in the temperatures ranging from 323 to 367 K. The possible mechanism of reaction was mathematically treated using the theories of the Eley-Rideal model based on inhibition by water and isobutanol on the resins. The reaction rate constants and the adsorption coefficients for isobutanol and water were determined from the experimental data at the same temperature intervals. Furthermore, the activation energy of the esterification reaction was found to be 50.5 kJ=mol. The heat of adsorption for isobutanol and water was also calculated as À50.9 kJ=mol and À18.9 kJ=mol, respectively.

show abstract

Reaction kinetics of lactic acid with methanol catalyzed by acid resins

Cited by 42 publications

References 5 publications

Bifunctional imidazole‐PTSA deep eutectic solvent for synthesizing long‐chain ester IBIBE in reactive extraction

Bifunctional imidazole‐PTSA deep eutectic solvent for synthesizing long‐chain ester IBIBE in reactive extraction

Methyl lactate synthesis using batch reactive distillation: Operational challenges and strategy for enhanced performance

Determination of Adsorption and Kinetic Parameters for Synthesis of Isobutyl Acetate Catalyzed by Amberlite Ir-122

Contact Info

Product

Resources

About