Title:
METHOD FOR SEPARATING METHANOL-MEDIATED HEMICELLULOSE ALKALINE SOLUTION AND METHOD FOR SEPARATING ETHANOL-MEDIATED HEMICELLULOSE ALKALINE SOLUTION
Document Type and Number:
WIPO Patent Application WO/2019/119741
Kind Code:
A1
Abstract:
Disclosed are a method for separating a methanol-mediated hemicellulose alkaline solution and a method for separating an ethanol-mediated hemicellulose alkaline solution, wherein methanol/ethanol is added to an alkaline solution with dissolved hemicellulose, and is fully and uniformly mixed; the effect of the hydration layer formed between the hemicellulose and the alkaline solution is destroyed through the hydrophobic effect mediated by the methanol/ethanol, such that the hemicellulose is precipitated from the solution system; and a hemicellulose precipitate and the alkaline methanol/ethanol solution are obtained through sedimentation, centrifugation or filtration separation. By utilizing the promotion effect of alkaline conditions on the evaporation and gasification separation of methanol/ethanol and water, the methanol/ethanol and the alkaline solution are separated by using reduced pressure distillation (rectification) or a gasification membrane, and the prepared alkaline solution and the methanol/ethanol are reused for dissolving the hemicellulose and separation. By means of the complete reuse of the strong alkaline solution and methanol/ethanol of the method, the efficient, clean and economical production of alkali dissolution and separation of hemicellulose is achieved, and the separation and recovery efficiency of alkali-dissolved hemicellulose exceeds 99%.
Inventors:
XU YONG (CN)
LUO JING (CN)
YU SHIYUAN (CN)
LUO JING (CN)
YU SHIYUAN (CN)
Application Number:
PCT/CN2018/090851
Publication Date:
June 27, 2019
Filing Date:
June 12, 2018
Export Citation:
Assignee:
UNIV NANJING FORESTRY (CN)
International Classes:
C08B37/14
Foreign References:
| CN108047353A | 2018-05-18 | |||
| CN103924468A | 2014-07-16 | |||
| CN105297511A | 2016-02-03 | |||
| CN1923855A | 2007-03-07 | |||
| CN106632735A | 2017-05-10 |
Attorney, Agent or Firm:
BEIJING GAOWO LAW FIRM (CN)
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