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电化学(中英文) ›› 2002, Vol. 8 ›› Issue (1): 73-77. 

• 研究论文 • 上一篇    下一篇

固定床反应器电合成乙醛酸的研究

樊金红,李军,苏玉忠,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 福建厦门361005 ,福建厦门361005 ,福建厦门361005 ,福建厦门361005
  • 收稿日期:2002-02-28 修回日期:2002-02-28 出版日期:2002-02-28 发布日期:2002-02-28

Electrosynthesis of Glyoxylic Acid in a Packed Bed Reactor

FAN Jin_hong, LI Jun , SU Yu_zhong, GAO Hao_qi   

  1. (Dept. of Chem. Engin., Xiamen Univ., Xiamen 361005,China
  • Received:2002-02-28 Revised:2002-02-28 Published:2002-02-28 Online:2002-02-28

摘要: 以过饱和草酸水溶液为阴极液 ,盐酸为阳极液 ,在固定床电解槽中草酸电还原得到乙醛酸 .考察改变固定床的结构、电解温度及电流密度对生成乙醛酸电流效率和产率的影响 .结果表明 ,以铅粒作阴极 ,石墨板作阳极 ,电流密度 96 .3A·m- 2 ,阴极液空速 0 .5 0 5m·s- 1,电解温度 32℃时 ,在固定床双阳极室内反应 4 5min ,乙醛酸的电流效率仍达到 6 6 .2 % ,浓度 2 .0 2 %

关键词: 固定床, 草酸, 电合成, 乙醛酸

Abstract: Glyoxylic acid was produced by electroreduction of oxalic acid in a packed bed reator.The cathodic and anodic electrolytes were super_saturated oxalic and hydrochloric acid aqueous solutions separated by a super_acid ion_exchange membrane.The current efficiency and yield of glyoxylic acid were studied under different structured packed bed reactors and different electrode materials,temperatures and current densities.The results indicated that the current efficiency of synthsis of glyoxylic acid was over 66.2% and the concentration of glyoxylic acid could reach 2.02% after 45min electrolysis with cathode of lead particles and anode of graphite board under conditions of temperature 32 ℃,superficial flow rate of 0.505 m·s -1 and current density of 96.3 A·m -2 in a packed bed reactor with double_anode cell.

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