草酸电解合成乙醛酸连续化工艺研究  

A Continuous Operation for Electroreduction of Oxalic Acid to Glyoxylic Acid

作　　者：胡晓慧[1] 剡翔飞[1] 苏玉忠[1] 李军[1] 李清彪[1] 

机构地区：[1]厦门大学化学化工学院化学工程与生物工程系,福建厦门361005

出　　处：《电化学》2005年第4期425-429,共5页Journal of Electrochemistry

基　　金：福建省科技计划重点项目(编号:2003H045)资助)

摘　　要：针对传统草酸电解生产乙醛酸工艺只能间歇循环的缺陷,本文提出模拟连续化实验方案,并分别设计阴极冷却反应器和阴极冷却固定床反应器,探讨连续化实验的可行性.另外还考察了草酸饱和度和温度工艺参数对反应的影响.实验表明,保持草酸过饱和和利用变温操作可在反应停留时间(30m in)内于连续化反应过程中得到分别含有3.76%和3.66%乙醛酸的反应液,因此阴极冷却固定床反应器可望实现草酸电解还原乙醛酸的连续化生产.A simulative-continuous-operation approach was proposed to study the continuous operation for electroreduction of oxalic acid to gloxylic acid using a packed bed reactor and a parallel reactor with cooled cathode in order to solve the low productivity problem in current state by using traditional reactor. The effects of the concentration of oxalic acid and temperature on this process were also studied. Results showed that, after 30min of the reaction （residence time）, the mass fraction of the produced glyoxylic acid in the catholic solution could reach 3.76% and 3.66% with respect to a saturated oxalic acid method and a step - temperature decreasing method. From this study, we conclude that it is feasible to produce glyoxylic acid through the three - dimensional electrode reactor under a continuous operation.

关 键 词：草酸电解法 阴极冷却固定床 连续化 

分 类 号：TQ151[化学工程—电化学工业]