Herein, acidic concentrated lithium bromide-water system was efficiently carried out to synthesize levulinic acid (LA) from raw lignocellulose by two-step treatment. Saccharification was processed in 1st step, and 80.96 wt% glucose and 85.60 wt% xylose were yielded based on their theoretical yield from poplar at 110 °C for 20 min. The hydrolysate after solid residual lignin (SRL) separation was converted into LA and furfural by thermal treatment (130 °C) in the 2nd step, where 67.0 wt% LA and 48.0 wt% furfural were yielded. The SRL in 1st step, with high hydrophobicity and uniform dispersity, was used to prepare lignin nanoparticles (LNPs), which showed tailored size (100–200 nm diameters) and morphology in solid or hollow structure with single hole. Additionally, the residue in 2nd step was suggested as biochar. So far, this study offered a simple pathway for utilization of raw lignocellulose in water system, resulting in high yields of LA and LNPs.

在此，酸性浓溴化锂-水体系通过两步处理从木质纤维素原料中有效地合成乙酰丙酸（LA）。在第一步中进行糖化，根据杨树在 110°C 下 20 分钟的理论产率，得到 80.96 wt% 的葡萄糖和 85.60 wt% 的木糖。固体残留木质素 (SRL) 分离后的水解产物在第二步中通过热处理 (130 °C) 转化为 LA 和糠醛，其中产生 67.0 wt% LA 和 48.0 wt% 糠醛。第一步中的 SRL 具有高疏水性和均匀分散性，用于制备木质素纳米粒子 (LNP)，其在具有单孔的实心或空心结构中显示出定制的尺寸（100-200 nm 直径）和形态。此外，第二步中的残留物被建议为生物炭。迄今为止，