Title:A Comparative Study on the Thermal and Microwave-assisted Direct Esterification of Phenyl-H-phosphinic Acid - Modeling the Rate Enhancing Effect of MWs
VOLUME: 6 ISSUE: 4
Author(s):Gyorgy Keglevich*, Nora Z. Kiss and Zoltan Mucsi
Affiliation:Budapest University of Technology and Economics, Department of Organic Chemical Technology, Budapest, Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, 1521 Budapest, Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, 1521 Budapest
Keywords:Phenyl-H-phosphinic acid, esterification, microwave, local overheating, modeling, arrhenius equation.
Abstract:Background: The theoretical background of MW-assisted reactions is in the focus these
days.
Objective and Method: We wished to model the distribution of local overheatings (OHs)
mathematically, and the rate enhancing effect of the OHs utilizing the Arrhenius equation. The model
reaction was the esterification of phenyl-H-phosphinic acid with 15-fold butanol at 160 °C.
Results: The results of the modelling and predictions matched the experimental data revealing the MWassited
esterification to be 2.71 time faster than the thermal reaction.
Conclusion: Our explanation for the beneficial effect of MW irradiation assuming local OHs may be
modelled well, and is in accord with experimental data.
