欢迎访问《电化学(中英文)》期刊官方网站,今天是

电化学(中英文) ›› 2002, Vol. 8 ›› Issue (2): 213-218. 

• 研究论文 • 上一篇    下一篇

阴极冷却反应器电合成乙醛酸

樊金红,李军,陈学云,李薇,高浩其   

  1. 厦门大学化工系,厦门大学化工系,厦门大学化工系,厦门大学化工系,宁波高等专科学校 福建厦门361005 ,福建厦门361005 ,福建厦门361005 ,福建厦门361005 ,浙江宁波315016
  • 收稿日期:2002-05-28 修回日期:2002-05-28 出版日期:2002-05-28 发布日期:2002-05-28

Electrosynthesis of Glyoxylic Acid in a Cooled Cathode Reactor

FAN Jin_hong 1,LI Jun *1 ,CHEN Xue_yun 1,LI Wei 1,GAO Hao_qi 2   

  1. (1.Dept. of Chem. Engin., Xiamen Univ., Xiamen 361005, China; 2.Ningbo College, Ningbo 315016, China
  • Received:2002-05-28 Revised:2002-05-28 Published:2002-05-28 Online:2002-05-28

摘要: 以过饱和草酸水深液为阴极液 ,盐酸溶液为阳极液 ,在阴极冷却电化学反应器内草酸电解合成乙醛酸 .考察了电极温度、电解液温度、电流密度和电极材料对合成乙醛酸的时空产率和电流效率的影响 .结果表明 ,阴极冷却反应器既节省能耗 ,又可使电解过程在较高草酸浓度下进行 ,提高电流效率和时空产率 .用石墨板做阳极 ,铅做阴极 ,电流密度为 4 0 9.4 6A·m-2 ,阴极液流速 μ=1 .0 8m·s-1,电解温度为 2 0℃左右时 ,电解 3 .70h ,可得到质量分数为 3 .52 %的乙醛酸溶液 ,平均时空产率为 0 .0 3 2kg·dm-3·h

关键词: 草酸, 乙醛酸, 阴极冷却

Abstract: Glyoxylic acid was produced by electroreduction of oxalic acid in a well designed cooled cathode reactor. The cathodic and anodic electrolytes were super_saturated oxalic acid and hydrochloric acid aqueous solutions separated by a super_acid ion_exchange membrane. The current efficiency and time_space yield of glyoxylic acid were studied under different temperatures of cathode and electrolyte,current densities,materials of cathode. With the cooled cathode reactor, the energy consumption was reduced and higher oxalic acid concentration was available in solution, so that current efficiency was improved. The results indicated that the average time_space yield of glyoxylic acid was about 0.032 kg·dm -3 ·h -1 and the concentration of glyoxylic acid could reach 3.52 % after 3.7 h electrolysis with cathode of lead and anode of graphite board under conditions of temperature 20 ℃, catholyte flow rate of 1.08 m·s -1 and current density of 409.46 A·m -2 in the cooled cathode reactor.

Key words: Cooled cathode, Oxalic acid, Glyoxylic acid

中图分类号: