摘要
研究连续草酸电解还原制备乙醛酸的过程和工艺。采用一膜两室电解面积为10cm×10cm的离子膜电解槽进行连续电解实验,比较了电极材料、阳离子交换膜材料、研究了电解液流量对电流效率的影响以及电流密度、电解温度和电解时间对电解过程的影响。结果表明以铅极板作阴极、钽-铱作阳极板、NF-1型含氟磺酸阳离子交换膜时电解的效果较好,得到的优化电解条件为:电流密度1000A.m-2,电解温度25℃,电解时间4.5h,阴极液和阳极液流量均为2L.min-1。在此条件下的电耗为3038.9kWh.t-1产品,研究结果可为工业化设计提供参考数据。
Tiffs paper concerned the process and technology of continuous electrolytic reduction of oxalic acid to prepare glyoxylic acid.Tire experiments were carried out on a two chambers electrobath with one ionexchange membrane and two electrodes which has an electrolysis area of 10cm × 10cm. Materials of electrodes and cation exchange membrane were first compared, then the influence of flow rate on current efficiency as well as the influences of condition of electrolysis including the current density, temperature, and the time of electrolysis on the process were studied.The results show that, the optimized electrolysis condition was under temperature 25℃, current density 1000A·m^- 2, flow rate 2L·m^-1in, and electrolysis time 4.5h on the selected NF- 1 cation exchange membrane with lead electrode as cathode and Ta- Ir electrode as anode. Under this condition, the electrical energy cost is 3038.9kWh·t^-1. which provide a choice for industrial magnification.
出处
《化学工程师》
CAS
2006年第8期6-9,共4页
Chemical Engineer
关键词
草酸
乙醛酸
电解
oxalic acid
glyoxylic Acid
electrolysis
