木质素磺酸盐
化学
香兰素
降级(电信)
电化学
香兰素酸
试剂
氧化剂
木质素
无机化学
水溶液
化学工程
阴极
有机化学
电极
物理化学
工程类
电信
计算机科学
作者
Jana Klein,Siegfried R. Waldvogel
出处
期刊:Chemsuschem
[Wiley]
日期:2023-03-09
卷期号:16 (8)
被引量:6
标识
DOI:10.1002/cssc.202202300
摘要
A sustainable electrochemical pathway for degradation and thermal treatment of technical lignosulfonate is presented. This approach is an opportunity to produce remarkable quantities of low molecular weight compounds, such as vanillin and acetovanillone. For the electrochemical degradation, a simple two-electrode arrangement in aqueous media is used, which is also easily scalable. The oxidation of the biopolymer occurs at the anode whereas hydrogen is evolved at the cathode. The subsequent thermal treatment supports the degradation of the robust chemical structure of lignosulfonates. With optimized electrolytic conditions, vanillin could be obtained in 9.7 wt% relative to the dry mass of lignosulfonate used. Aside from vanillin, by-products such as acetovanillone or vanillic acid were observed in lower yields. A new and reliable one-pot, two-step degradation of different technically relevant lignosulfonates is established with the advantages of using electrons as an oxidizing agent, which results in low quantities of reagent waste.
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