Kinetics and mechanism of homogeneous catalytic hydroxylation of maleic acid by hydrogen peroxide: III. Kinetics of the hydrolysis of cis-epoxysuccinic acid

✍ Scribed by John O Oludipe

• Publisher: Wiley (John Wiley & Sons)
• Year: 1999
• Tongue: English
• Weight: 86 KB
• Volume: 74
• Category: Article
• ISSN: 0268-2575
• DOI: 10.1002/(sici)1097-4660(199908)74:8<785::aid-jctb102>3.0.co;2-m

✦ Synopsis

The objective of this work was to study the hydrolysis kinetics and also the character of the involvement of the epoxidation catalyst (Na 2 WO 4 ± sodium tungstate) on the hydrolysis of cisepoxysuccinic acid (the initial product in the hydroxylation reaction of maleic acid by hydrogen peroxide). The results obtained at 65 °C clearly revealed that the hydrolysis reaction exhibits a considerably low rate in the absence of a catalyst whilst the rate is signi®cantly enhanced by the introduction of catalytic quantities of Na 2 WO 4 . The phenomenon of end-product inhibition was observed in this study and the results obtained permitted the development of a kinetic model consistent with experimental observations. Analysis of the kinetic model shows that the reaction is ®rst order with respect to the concentrations of the catalyst and the epoxide. However, tartaric acid has a strong inhibitive in¯uence on the overall reaction rate.