Title:
EUTECTIC SOLVENT AND APPLICATION THEREOF IN EXTRACTING LIGNIN
Document Type and Number:
WIPO Patent Application WO/2021/036156
Kind Code:
A1
Abstract:
The present disclosure belongs to the technical field of biomass refining, and specifically relates to a eutectic solvent and an application thereof in extracting lignin. The eutectic solvent is composed of a certain amount of a hydrogen bond donor and a certain amount of a hydrogen bond acceptor, and is an economical and environmentally-friendly green solvent. Choline eutectic solvents have a wide range of applications in the extraction of lignocellulose. The inventor has found that the presence of chloride ions in choline eutectic solvents causes negative charge distribution to be concentrated, which reduces extraction efficiency and accelerates the aging of instruments. Provided in the present disclosure is a eutectic solvent having low halogen content, wherein organic acid radical ions are used to replace halogen anions in choline. Studies in the present disclosure prove that the described method has a high lignin extraction rate, high purity, simple operation, an obvious effect, strong practicability, low pollution and is easily promoted.
Inventors:
YANG GUIHUA (CN)
QI LETIAN (CN)
LIU JINKE (CN)
CHEN JIACHUAN (CN)
QI LETIAN (CN)
LIU JINKE (CN)
CHEN JIACHUAN (CN)
Application Number:
PCT/CN2020/070222
Publication Date:
March 04, 2021
Filing Date:
January 03, 2020
Export Citation:
Assignee:
UNIV QILU TECHNOLOGY (CN)
International Classes:
C08H7/00; C07G1/00
Foreign References:
| CN110540508A | 2019-12-06 | |||
| CN107311833A | 2017-11-03 |
Other References:
1 June 2018, article LI, TENGFEI: "Study on Separation and Extraction of Willow Lignin using Eutectic Solvents", pages: 1 - 77, XP055787677
ALVAREZ CARLOS, RUOSHUI MA, MELISSA QUINTERO, SCOTT GELEYNSE, MOND GUO, KARTHIKEYAN K. RAMASAMY, MICHAEL WOLCOTT, XIAO ZHANG: "Unique Low-molecular-weight Lignin with High Purity Extracted from Wood by Deep Eutectic Solvents (DES): A Source of Lignin for Valorization", GREEN CHEMISTRY, vol. 18, no. 19, 1 January 2016 (2016-01-01), pages 1 - 8, XP055787673, ISSN: 1463-1926
CHEN YUJIE, ZHANG LILI, YU JUAN, LU YINGZHAO, JIANG BO, FAN YIMIN, WANG ZHIGUO: "High-purity lignin isolated from poplar wood meal through dissolving treatment with deep eutectic solvents", ROYAL SOCIETY OPEN SCIENCE, vol. 6, no. 1, 1 January 2019 (2019-01-01), pages 181757, XP055787675, DOI: 10.1098/rsos.181757
ALVAREZ CARLOS, RUOSHUI MA, MELISSA QUINTERO, SCOTT GELEYNSE, MOND GUO, KARTHIKEYAN K. RAMASAMY, MICHAEL WOLCOTT, XIAO ZHANG: "Unique Low-molecular-weight Lignin with High Purity Extracted from Wood by Deep Eutectic Solvents (DES): A Source of Lignin for Valorization", GREEN CHEMISTRY, vol. 18, no. 19, 1 January 2016 (2016-01-01), pages 1 - 8, XP055787673, ISSN: 1463-1926
CHEN YUJIE, ZHANG LILI, YU JUAN, LU YINGZHAO, JIANG BO, FAN YIMIN, WANG ZHIGUO: "High-purity lignin isolated from poplar wood meal through dissolving treatment with deep eutectic solvents", ROYAL SOCIETY OPEN SCIENCE, vol. 6, no. 1, 1 January 2019 (2019-01-01), pages 181757, XP055787675, DOI: 10.1098/rsos.181757
Attorney, Agent or Firm:
FANG & ASSOCIATES (CN)
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