Kinetic investigations on the esterification of phthalic anhydride with n-heptyl, n-nonyl or n-undecyl alcohol over sulfuric acid catalyst

摘要

Kinetic investigations on the syntheses of higher aliphatic alcohol (C₇, C₉, C₁₁) phthalates have been conducted in an isothermal, semibatch reactor. The first stage of the process, the formation of monoester, is very fast and irreversible. The second stage, the esterification of monoester towards diester, is slow and catalyst should be used. These reactions appear to be first order with respect to monoester and do not depend on the concentration of alcohol.