无隔膜电解合成乙醛酸研究

Study on the electrolytic reduction of oxalic acid to glyoxylic acid without diaphragm

研究了无隔膜电解草酸法生产乙醛酸的工艺 .使用性能优良的新型阳极材料钽铱电极 ,并对电解工艺进行了优化 .结果表明 :在电解温度为 2 0℃ ,电流密度为 350A/m2 ,使用钽铱电极 ,电解草酸饱和溶液 8h后 ,乙醛酸产率达 81% .该法具有装置简单、耗电低、电解液不受污染、阳极材料使用寿命长、产品纯度高等优点 .

Electrolytic reduction of oxalic acid to glyoxylic acid has been investigated.In the cell with lead cathode and iridium tantalum anode,under the condition of temperature of 20℃,current density of 350A/m 2,electrolytic time of 8 hours,the yield of glyoxylic acid can reach as high as 81%.Furthermore,the method has advantages of simple operation, mild reaction condition,high purity of the product without contamination.