TITLE

ANALYSIS METHODS FOR PYRAZINE-2,3-DICARBOXYLIC ACID SYNTHESIZED USING ELECTROCHEMICALLY REGENERATED KMnO4

AUTHOR(S)
Ţăranu, Bogdan-Ovidiu; Vlaia, Vicenţiu; Stefănuţ, Mariana-Nela; Vlţtţnescu, Valeria Nandina; Dobrescu, Marius-Ciprian; Popa, Iuliana
PUB. DATE
August 2010
SOURCE
Environmental Engineering & Management Journal (EEMJ);Aug2010, Vol. 9 Issue 8, p1115
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Previous studies have shown that pyrazine-2,3-dicarboxylic acid (PDCA) can be obtained through quinoxaline (Q) oxidation with electrochemically regenerated KMnO4 using Pt, Ni, stainless steel, Cu, brass and bronze electrodes. This corresponds to a smaller oxidant consumption as compared to the chemical oxidation reaction, a smaller energy consumption, an increase in the PDCA manufacturing efficiency and a significantly smaller impact on the environment due to secondary products removal (both from Q oxidation as well as from KMnO4 production). This paper presents the analysis methods used for the quantitative determination of PDCA obtained through Q oxidation (such as conductometric titration, UV-VIS and IR spectrophotometry) as well as those used for monitoring Mn7+ and Mn6+ concentrations (UV-VIS spectrophotometry and the visual method). The right conditions for applying these methods were established in order to properly evaluate the electrochemical process.
ACCESSION #
55786649

 

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