Biorefineries are meant to play a key role as regards both the complementation of energy sources and the integral exploitation of biomass. Wood residues left over from industrialisation have a high potential to obtain numerous bio-based products. The aim of this work was to obtain high quality and high purity lignin as well as a solid product rich in carbohydrates with not more than 10%ODW of the remaining acid-insoluble lignin. To achieve this goal, a soda-ethanosolv process was optimised for the delignification of washed black carob tree sawdust (WBCTS) using a central composite experimental design; afterwards, the time of reaction was adjusted. The optimum process (19.9% NaOH (ODW of WBCTS) and 58:42 EtOH:H₂O) was found, and then the reaction time was adjusted to 80 min for a higher delignification (pretreated WBCTS with less than 10%ODW). Therefore, the lignin recovered from the liquor of the SodEt process is of high quality and good purity and, the IR spectrum of the lignin is consistent with GS lignins. The results found could be used to establish sustainable chains of high value of bio-based products obtained from black carob tree sawdust and by using low-impact technologies with low environmental impact which could be applied to biorefineries.

生物精炼厂将在能源补充和生物质整体开发方面发挥关键作用。工业化过程中残留的木材残渣具有获得众多生物基产品的巨大潜力。这项工作的目的是获得高质量和高纯度的木质素，以及富含碳水化合物的固体产品，其中剩余的不溶于酸的木质素的ODW不超过10％。为了实现这一目标，采用中央复合实验设计优化了苏打-乙醇溶液工艺，以使洗涤后的黑角豆树屑（WBCTS）脱木质素。之后，调节反应时间。最佳工艺（19.9％NaOH（WBCTS的ODW）和58:42 EtOH：H ₂发现O），然后将反应时间调节至80分钟以实现更高的脱木质素作用（ODW小于10％的预处理WBCTS）。因此，从SodEt方法的液体中回收的木质素具有高质量和良好的纯度，并且木质素的IR光谱与GS木质素一致。发现的结果可用于建立从黑角豆树锯末获得的高价值生物基产品的可持续链，并通过使用对环境具有低影响的低影响技术应用于生物炼油厂。