Title:
HIGH-EFFICIENCY PRETREATMENT SEPARATION OF HEMICELLULOSE FROM FIBER-BASED BIOMASS AND COMPREHENSIVE UTILIZATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2020/258463
Kind Code:
A1
Abstract:
The high-efficiency pretreatment separation of hemicellulose from a fiber-based biomass raw material and a comprehensive utilization method therefor. Using a fiber-based biomass raw material which is a type of forest biomass resource as a raw material, the fiber-based biomass raw material is first subjected to a slurry method pretreatment: the fiber-based biomass raw material is ground by a ball mill and sieved to obtain fiber-based biomass raw material powder of a certain mesh, and the powder is mixed with water at a room temperature according to a ratio to obtain a fiber-based biomass raw material powder slurry premixed liquid; by means of the regulation and control of the reaction temperature, time and water quantity, hemicellulose is hydrothermally and highly efficiently removed from the fiber-based biomass raw material powder in a slurry fiber-based biomass raw material powder premixed liquid system; once the mixed liquid is filtered, the filtrate is subjected to gradient precipitation to separate low-dispersion hemicellulose, the precipitate is dried, and the dried material is stored; once filter residue, a polar aprotic solvent and water are mixed, the mixture is heated and stirred in a pressurized reaction kettle for a certain period of time, and undergoes filtering separation to obtain high-purity cellulose, which is washed using water, dried and stored; the filtrate and water are mixed, the mixture is allowed to stand, the precipitated powder is filtered, drying is performed, and the dried material is stored; and the filtrate is subjected to reduced-pressure distillation to recover water, the solvent and a small amount of small-molecular chemicals, and recycling is performed.
Inventors:
WANG KUI (CN)
JIANG JIANCHUN (CN)
LIU YANYAN (CN)
XU JUNMING (CN)
WEI MIN (CN)
WEI LINSHAN (CN)
WANG RUIZHEN (CN)
JIANG JIANCHUN (CN)
LIU YANYAN (CN)
XU JUNMING (CN)
WEI MIN (CN)
WEI LINSHAN (CN)
WANG RUIZHEN (CN)
Application Number:
PCT/CN2019/100944
Publication Date:
December 30, 2020
Filing Date:
August 16, 2019
Export Citation:
Assignee:
INST CHEMICAL IND FOREST PRODUCTS CAF (CN)
International Classes:
C07D307/46; C08B37/14; C07D307/48; C07G1/00; C08B37/00; D21C3/20
Foreign References:
| CN105672012A | 2016-06-15 | |||
| CN109535109A | 2019-03-29 | |||
| CN104404803A | 2015-03-11 | |||
| CN103480627A | 2014-01-01 |
Attorney, Agent or Firm:
NANJING RUIHONG PATENT & TRADEMARK AGENCY (ORDINARY PARTNERSHIP) (CN)
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