在离子液体中选择性电化学氧化乙醇为乙醛

The Indirect Electrochemistry Oxidation of Alcohol to Aldehyde in the Ionic Liquid

以质子酸离子液体甲基咪唑硫酸氢盐(HmimHSO4)作为溶剂和催化剂设计了一种可控电化学氧化乙醇为乙醛的工艺。结果显示,在优化的条件下,在同一催化反应体系中乙醇可以选择性氧化为乙醛,并且催化体系在使用七次以后并没有发现催化活性有所下降,此催化体系可以很好的实现循环使用,在调控合成乙醛的过程中没有任何废物排放,符合当前绿色化学所倡导的基本要求。

The indirect electrochemistry oxidation of alcohol could be carried out in the protonic ionic liquid methy- limidazolium hydrogen sulfate with high selectivity and current efficiency. The reaction consumed alcohol and produced the corresponding aldehyde with the co - product of hydrogen gas in the electrochemistry oxidation of alcohol. Further more, the corresponding carbonyl products could be separated from the electrolyte solution by the refluxing method, and the elec- trolyte solution could be recycled without apparent decrease in activity. Thus, this approach avoided the problematic by - products and separation difficulty in the preparation of the short chain aliphatic aldehydes.