Development of the lignin extraction method from para rubber wood sawdust with choline chloride-lactic acid deep eutectic solvent

Abstract This work investigated the extraction of lignin from para rubber wood sawdust by deep eutectic solvent (DES) using choline chloride-lactic acid (ChCl-LA). The DES was operated ChCl/LA with molar ratio 1:10, and extracted good yields. To determine optimal conditions for this technique, various factors were studied, including temperature (90-150 °C), time (6-24 h), amount water required precipitation (150-300 mL), (24-48 h). optimized achieved at 150 °C, 24 h, 300 mL DI 48 h time, highest content 17.54%. Moreover, excessive in solution can be recovered evaporation, it discovered that similar could obtained (16.85%) only during but extending to h. study provides a simple, inexpensive, environmentally friendly technique.