Przemysl Chemiczny, Vol.89, No.3, 246-248, 2010
Synthesis of di-n-butyl phthalate and di-isobutyl phthalate over sulphuric acid catalyst. Kinetic investigations
Phtalic anhydride was esterified with BuOH and iso-BuOH on H(2)SO(4) catalyst at 383 K to 413 K for 550 min to det. the reaction kinetics. Calculation of phtalic anhydride conversion was based on det. the acid no. of the reaction mixt. The reaction was 1st order reaction in respect to the monophthalates. The activation energy was 78.5 kJ/mol for BuOH and 79.2 kJ/mol for iso-BuOH. The reaction rate did not depend on the alc. concns.