Journal
JOURNAL OF CHEMICAL ENGINEERING OF JAPAN
Volume 39, Issue 3, Pages 327-333Publisher
SOC CHEMICAL ENG JAPAN
DOI: 10.1252/jcej.39.327
Keywords
terephthalic acid; dimethyl terephthalate; hydrolysis; mono methyl terephthalate; kinetics
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Hydrolysis of dimethyl terephthalate (DMT) to produce terephthalic acid (TPA) was studied using a batch reactor. Zink acetate was used as a catalyst to promote the reaction rate. We found that the reaction consists of two reactions: from DMT to mono methyl terephthalate (MMT) and then MMT to TPA. The first reaction is relatively fast and irreversible while the second reaction is relatively slow and reversible. A kinetic equilibrium constant for the second reaction decreases with reaction temperature. A kinetic model consisting of the two reactions for the hydrolysis fitted well with the experimental data.
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