Abstract
AbstractKinetics of 1,1,1‐trimethylolpropane esterification by long‐chain (C4 —C18) carboxylic acids has been followed by GLC, HPLC, 1H‐NMR, and potentiometric titrimetry. The system composition evolution was established at technological conditions, i.e. molar ratio between 1/1 and 1/3 and temperatures between 160 and 205°C. The rate constants of the three involved consecutive reactions were determined according to the kinetic law which assumes a partial order of 1.5 with respect to the acid and 1.5 with respect to the alcohol.Once the three rate constants k1, k2, and k3 are known by direct determination, a computer simulation for the esterification process has been carried out. The experimental variation of the component concentrations and the calculated values show a proper agreement, thus proving the selected kinetic model.
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