Abstract
Using SBS-g-(AA/StSO3Na)/SBS-g-DMAEMA Bipolar Membrane as a separator between the cathode and anode chambers in the electrolysis cell,the optimum conditions of deoxidization of oxygen in cathode were obtained through orthogonal experiment. Then using tungstate/pertungstate as media to indirect electrooxidate hydrophobic monascus red colorant to prepare hydrophobic monascus yellow colorant in cathode. The experiment results show the average current efficiency of cathode was up to 72.39% under the following conditions:that graphite as electrode,10% sulfuric acid as anode electrolyte,0.5 g·L-1 hydrophobic monascus red colorant solution as cathode electrolyte,tungstate concentration:15 mmol/L,pH:3,flow rate of oxygen:65 cm3/min,electrolyze 2 h under the current density of 5.78 mA·cm-2. The FT-IR and UV-VIS results of electrolysis products indicated the epoxidation of hydrophobic monascus red colorant.
Keywords
hydrophobic monascus red colorant, tungstate, hydrogen peroxide, current efficiency, hydrophobic monascus yellow colorant
Publication Date
2009-08-28
Online Available Date
2009-08-28
Revised Date
2009-08-28
Received Date
2009-08-28
Recommended Citation
Wen-jian CHEN, Xue-hong HUANG, Zhen CHEN, Sheng-bo KE, You-zhen LIN.
Tungstate/Pertungstate System Cathodic Indirect Oxidation to Synthesis Hydrophobic Monascus Yellow Colorant[J]. Journal of Electrochemistry,
2009
,
15(3): 293-298.
DOI: 10.61558/2993-074X.1998
Available at:
https://jelectrochem.xmu.edu.cn/journal/vol15/iss3/12
Included in
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