Title:
METHOD FOR PURIFYING LIGNIN
Document Type and Number:
WIPO Patent Application WO/2020/108067
Kind Code:
A1
Abstract:
The present document discloses a method for purifying lignin. The method comprises steps of solvent dissolution, ultrasonic vibration, centrifugal filtration, stirring in water at a constant temperature, and membrane filtration and drying. In the present application, lignin extracted from a plant fiber raw material using an organic solvent is added to a specific solvent, and is purified by sequentially performing the steps of ultrasonic vibration, centrifugal filtration, stirring in water at a constant temperature, and membrane filtration and drying. Any of the steps cannot be omitted and the sequence thereof cannot be reversed. The steps are efficiently coordinated to achieve a synergistic effect, so as to remove impurities in lignin, and significantly improve the purity of the lignin while maintaining a high purification yield. The invention has broad application prospects and high market value.
Inventors:
LIU YUNSI (CN)
MIN YU (CN)
ZHANG RUIZHE (CN)
GAN ZIFENG (CN)
MIN YU (CN)
ZHANG RUIZHE (CN)
GAN ZIFENG (CN)
Application Number:
PCT/CN2019/108188
Publication Date:
June 04, 2020
Filing Date:
September 26, 2019
Export Citation:
Assignee:
GUANGZHOU YINNOVATOR BIOTECH CO LTD (CN)
International Classes:
C08H7/00
Domestic Patent References:
| WO2017108055A1 | 2017-06-29 |
Foreign References:
| CN109456496A | 2019-03-12 | |||
| CN101845064A | 2010-09-29 | |||
| CN103275331A | 2013-09-04 | |||
| CN101712698A | 2010-05-26 | |||
| CN102261007A | 2011-11-30 | |||
| KR101521238B1 | 2015-05-18 |
Attorney, Agent or Firm:
BEYOND ATTORNEYS AT LAW (CN)
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