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AMBIENTUM BIOETHICA BIOLOGIA CHEMIA DIGITALIA DRAMATICA EDUCATIO ARTIS GYMNAST. ENGINEERING EPHEMERIDES EUROPAEA GEOGRAPHIA GEOLOGIA HISTORIA HISTORIA ARTIUM INFORMATICA IURISPRUDENTIA MATHEMATICA MUSICA NEGOTIA OECONOMICA PHILOLOGIA PHILOSOPHIA PHYSICA POLITICA PSYCHOLOGIA-PAEDAGOGIA SOCIOLOGIA THEOLOGIA CATHOLICA THEOLOGIA CATHOLICA LATIN THEOLOGIA GR.-CATH. VARAD THEOLOGIA ORTHODOXA THEOLOGIA REF. TRANSYLVAN
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The STUDIA UNIVERSITATIS BABEŞ-BOLYAI issue article summary The summary of the selected article appears at the bottom of the page. In order to get back to the contents of the issue this article belongs to you have to access the link from the title. In order to see all the articles of the archive which have as author/co-author one of the authors mentioned below, you have to access the link from the author's name. |
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STUDIA CHEMIA - Issue no. 2 / 2011 | |||||||
Article: |
OBTAINING PYRAZINE-2,3-DICARBOXYLIC ACID THROUGH ELECTROCHEMICAL OXIDATION OF QUINOXALINE ON NICKEL ELECTRODE. Authors: POPA IULIANA, ŢĂRANU BOGDAN, ŢĂRANU IOAN, DRAGOŞ ANA, MARIUS DOBRESCU. |
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Abstract: The purpose of this paper is to investigate the pyrazine-2,3-dicarboxylic acid (PDCA) synthesis process by quinoxaline chemical oxidation on nickel electrode with electrochemically regenerated potassium permanganate (KMnO4). The investigation of electrode reaction was carried out through cyclic voltammetry and an efficient electrolyser for PDCA synthesis was used. Anodic regeneration of Mn7+ on the nickel electrode is possible. This process is favoured by KOH, Mn7+ (Mn6+ implicitly) and quinoxaline concentrations as well as by temperature increase. Current and substance efficiencies of 80% and 85%, respectively, were achieved. Keywords: quinoxaline, pyrazine-2,3-dicarboxylic acid, potassium permanganate, cyclic voltammetry, electrolysis, nickel electrode. |
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