基于氯化胆碱的深共晶溶剂对黑液中木质素的高效、环保分离纯化

IF 0.9 4区农林科学 Q3 MATERIALS SCIENCE, PAPER & WOOD

Nordic Pulp & Paper Research Journal Pub Date : 2023-03-13 DOI:10.1515/npprj-2022-0093

Zhuang Liu, Yi Hou, Chao Liu, Song-Qing Hu

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引用次数: 0

摘要

摘要:研究了一种高效、绿色的从黑液(BL)中分离纯化木质素的方法——深共晶溶剂(DESs)。采用优化后的DES(乳酸:氯化胆碱(ChCl) 10∶1，摩尔比)，在700 W微波辅助、100℃、DES: BL 1:5 (v: v)、30 min条件下，从100 mL BL中得到的木质素得率和纯度分别为1.58 g和88.12%，比常规工艺的1.18 g和78.54%提高了。此外，95%以上的初步结果经过三个周期后获得。DESs与常规纯化木质素的组成和结构略有不同。对这两种工艺的溶剂成本进行了评估，表明DES工艺具有巨大的潜力，可以取代传统的笨重且不环保的木质素分离和纯化工艺，并有助于开发木质素潜在附加值的新策略。

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Efficient and eco-friendly isolation and purification of lignin from black liquor with choline chloride-based deep eutectic solvents

Abstract This study developed an efficient and green method for isolating and purifying lignin from black liquor (BL) using deep eutectic solvents (DESs). After the short and mild process (700 W microwave-assisted, 100 °C, DES: BL 1:5 (v: v), 30 min) using optimized DES (lactic acid (LA): choline chloride (ChCl) 10:1, molar ratio), the yield and purity of lignin obtained from 100 mL BL was 1.58 g and 88.12%, respectively, which was more efficient than the results of 1.18 g and 78.54% of the conventional process. Furthermore, more than 95% of initial results were obtained after three cycles. The composition and structure of DESs and conventionally purified lignin were slightly different. The solvent costs for both processes were also evaluated, showing that the DES process has great potential to replace traditional bulky and environmentally unfriendly procedures for lignin isolation and purification and to help develop new strategies for the potential added value of lignin.

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来源期刊

Nordic Pulp & Paper Research Journal 工程技术-材料科学：纸与木材

CiteScore

2.50

自引率

16.70%

发文量

审稿时长

1 months

期刊介绍： Nordic Pulp & Paper Research Journal (NPPRJ) is a peer-reviewed, international scientific journal covering to-date science and technology research in the areas of wood-based biomass: Pulp and paper: products and processes Wood constituents: characterization and nanotechnologies Bio-refining, recovery and energy issues Utilization of side-streams from pulping processes Novel fibre-based, sustainable and smart materials. The editors and the publisher are committed to high quality standards and rapid handling of the peer review and publication processes. Topics Cutting-edge topics such as, but not limited to, the following: Biorefining, energy issues Wood fibre characterization and nanotechnology Side-streams and new products from wood pulping processes Mechanical pulping Chemical pulping, recovery and bleaching Paper technology Paper chemistry and physics Coating Paper-ink-interactions Recycling Environmental issues.