Method for realizing component fractionation by coupling eutectic solvent with alkaline oxidation treatment of lignocellulose and application thereof

By leveraging the synergistic effect of eutectic solvents and alkaline oxidants, efficient removal of lignin and retention of cellulose are achieved, solving the problems of high energy consumption and demanding equipment requirements of existing pretreatment technologies. This provides an efficient and economical method for fractionating lignocellulose components, applicable to various agricultural and forestry straws.

CN122127618APending Publication Date: 2026-06-02EAST CHINA UNIV OF SCI & TECH
View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
EAST CHINA UNIV OF SCI & TECH
Filing Date
2026-03-20
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Existing pretreatment technologies for processing lignocellulose suffer from problems such as high energy consumption, demanding equipment requirements, harsh reaction conditions, and the formation of inhibitors, resulting in low cellulose enzymatic hydrolysis efficiency and making it difficult to achieve high-value utilization of lignin.

Method used

A method using the synergistic effect of a eutectic solvent and an alkaline oxidant is employed. By synthesizing a eutectic solvent and mixing it with an alkaline oxidant, and reacting under normal pressure, pretreatment of lignocellulose is achieved, resulting in efficient separation of lignin while retaining cellulose.

Benefits of technology

It achieves a lignin removal rate of ≥90% and a cellulose retention rate of ≥90%, with mild reaction conditions, low energy consumption, and recyclable solvent. It is suitable for various agricultural and forestry straws, and has the advantages of efficient enzymatic reaction and significant economic benefits.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure FT_1
    Figure FT_1
  • Figure SMS_1
    Figure SMS_1
Patent Text Reader

Abstract

This invention discloses a method and application for fractional distillation of lignocellulose through alkaline oxidation coupled with a eutectic solvent, belonging to the field of high-value utilization technology of agricultural and forestry waste resources. The invention first prepares a eutectic solvent (DES) using quaternary ammonium salt hydrogen bond acceptors and amine and alcohol hydrogen bond donors as raw materials. Then, the lignocellulose raw material, DES solvent, and an alkaline oxidation system composed of NaOH and H₂O₂ are mixed and reacted at 70-130 °C under normal pressure for 1-4 h. Through steps such as alcohol release, water washing, solid-liquid separation, precipitation, and drying, efficient separation of biomass residue and lignin is achieved, while simultaneously recycling the eutectic solvent. This invention can achieve a lignin removal rate of ≥90% and a cellulose retention rate of ≥90%, and the separated residue has the potential for high-value conversion through efficient enzymatic reaction. This method achieves efficient separation of the three biomass components using low-cost recyclable solvents under medium-low temperature and short-time conditions. It has the advantages of high processing efficiency, wide raw material adaptability, environmental friendliness, and good industrialization prospects, and solves the problems of high energy consumption, easy degradation of cellulose, low lignin removal rate, and difficult solvent recovery of traditional pretreatment technologies.
Need to check novelty before this filing date? Find Prior Art