Collect. Czech. Chem. Commun. 1989, 54, 2099-2104

Kinetics of esterification of diisopropylphenols with phosphoryl trichloride

Miroslav Maguraa, Ján Vojtkob and Ján Ilavskýb

a Chemko, 072 22 Strážske
b Department of Organic Technology, Slovak Technical University, 812 37 Bratislava


The title liquid-phase isothermal esterification kinetics have been measured in the temperature intervals of 110-125 and 110-160 °C for 2,4- and 2,6-diisopropylphenols, resp. The values measured have been used to calculate the rate constants of the respective three steps and to determine the activation energies. 2,6-Diisopropylphenol has been found to react only to the first degree, and the rate constants of the other two reaction steps (k2, k3) were only calculated from the differential equations given by means of a computer.