As for the process of the electro oxidation of glyoxal to glyoxalic acid, the electrolytic result of either fixed bed electrolytic cell or varying current electrolysis was better than that of either flat plate electrolytic cell or constant current electrolysis. The average current density of varying current electro synthesis of glyoxalic acid in pairs was 1535 A/m 2 and the current efficiency were 85.3% and 86.7% and the selectivity were 93.9% and 94.0% for the anodic oxidation and cathodal reduction respectively. The initial composition of anodic electrolyte was 7% glyoxal and 8% hydrochloric acid (W/W) and the cathodal electrolyte consisted of saturated oxalic acid aqueous solution mixed with trace quantity of additive. The mass ratio of glyoxalic acid to glyoxal of the primary anodic product was over 40∶3, which avoided the separation of glyoxal from glyoxalic acid aqueous solution.


Glyoxalic acid, Paired electro synthesis, Fixed bed electrolytic cell, Varying current electrolysis, Glyoxal, Oxalic acid

Publication Date


Online Available Date


Revised Date


Received Date



[1] HiroyukiHarada,Yokohama,kazuhiroHirao,etal.Processforproducingglyoxalicacidbyelectrolyticoxida tion[P].USPats4,235,684,1980.

[2] HouYu,HeHui xin,TongYuTing,GuDeng ping.TheElectrochemicalsynthesisofglyoxalicacidinapairedelectrodes[J].Chemicalworld(HuaxueShijie),1992,1:38.

[3] WuMing dong.Studyonelectrochemicalsynthesisofglyoxalicacid[D].China:EastChianUniversityofSci enceandTechnology,1998.

[4] ChenYin sheng,ZhangXin sheng,HuJun,DaiYing chun.Electro oxidationofglyoxaltoglyoxalicacid[J].Electrochemistry,2000,6(1):102.

[5] G .Pierre,MELKordiandG .Cauquis.Electrochemicalsynthesisofglyoxalicacidfromglyoxal.Part1,Roleoftheelectrolyte,temperatureandelectrodematerials[J].ElectroanalChem.,1985,186:167~177.

[6] CottkS .Apreliminaryinvestigationofthesimultaneousanodicandcathodicproductionofglyoxalicacid[J].ElectrochemicaActa.,1991,36(9):1447~1452.

[7] XuWen ling,DingPing,YuanWei kang.Thestudyonthefixed bedelectrolyticcell’sbehavior[J],ChemialEngineeringScience,1992,47:2307.

[8] ZhangXin sheng,DaiYing chun,ChenYin sheng,etal.Theprocessofelectro reductionofoxalicaacidtoglyoxalicacid[P].CNPats1281063A ,2001



To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.