Analysis of products distribution and selectivity in maleic acid epoxidation by hydrogen peroxide in catalytic systems

✍ Scribed by John O. Oludipe

• Publisher: Wiley (John Wiley & Sons)
• Year: 1997
• Tongue: English
• Weight: 282 KB
• Volume: 70
• Category: Article
• ISSN: 0268-2575
• DOI: 10.1002/(sici)1097-4660(199711)70:3<261::aid-jctb777>3.0.co;2-w

✦ Synopsis

This paper discusses the results of the analysis of products distribution and selectivity in hydrogen peroxide epoxidation of maleic acid (MA) in (H 2 O 2 ) the presence of sodium tungstate as catalyst in the native form and also immobilized on polymer resin support. A specially designed experimental procedure a †orded accurate monitoring of the oxygen released during epoxidation occasioned by decomposition and also enabled selectivity to be reliably H 2 O 2 estimated. Irrespective of the catalytic system employed, it was observed that between 10 and 15% of the initially present in the reaction is lost via H 2 O 2 decomposition which, presumably, is induced by the action of the metallic catalytic species. Consequently, selectivity was observed to drop gradually in the course of the reaction, but more rapidly in the case of the homogeneous catalysis.