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Green separating process for components of lignocellulose

A lignocellulosic and green process technology, which is applied in the high-value utilization of biomass resources and the field of biochemical industry, can solve the problems of waste acid or waste lye discharge, large water consumption, secondary pollution, etc., and achieve low energy consumption and high yield. The effect of high yield and purity, simple process operation

Active Publication Date: 2016-04-13
BEIJING UNIV OF CHEM TECH
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Problems solved by technology

[0003] To sum up, the currently published report patents on the separation of lignocellulose components all need to add acid or alkali, and alcohol analysis and other processes, which consume a lot of water and are prone to discharge of waste acid or waste lye, and there is "secondary pollution" " hidden danger

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  • Green separating process for components of lignocellulose
  • Green separating process for components of lignocellulose
  • Green separating process for components of lignocellulose

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Embodiment Construction

[0026] The present invention will be further described in conjunction with the following specific examples, which are only used to illustrate the present invention but not to limit the scope of the present invention.

[0027] Case 1:

[0028] Put the reeds into the irradiation box and irradiate at 500kGy. Weigh 1.0 g of irradiated crushed reed powder into a 50 mL reactor, add 10 mL of tetrahydrofuran / water (volume ratio 4:6) mixed solution, and react at 170°C for 3 h. After the reaction, cool down, rinse the residual residue in the reaction kettle with a mixed solution of 1 volume of tetrahydrofuran / water (volume ratio: 4:6), filter once, dry the filter cake at 105°C for 2 hours, and weigh to obtain the cellulose component 0.56g, the detected glucose content is 91.7%. Recover THF in the filtrate, the recovery rate is 91%, and can be reused. After secondary filtration, the filter cake was dried at 105° C. for 4 hours, and weighed to obtain 0.21 g of lignin component with a p...

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Abstract

The invention provides a green separating process for components of lignocellulose, which belongs to the fields of high-value utilization of biomass resources and biochemical industry. According to the process, biomass is pretreated with irradiation and then coupled with low-boiling-point tetrahydrofuran or high-boiling-point gamma-valerolactone for a reaction, and primary filtering is carried out so as to obtain a cellulose component; tetrahydrofuran is recovered from obtained filtrate or a saturated NaCl solution is added into the filtrate for phase-split precipitation of lignin; and secondary filtering is carried out, the obtained residue is a lignin component, and secondary filtrate is dried so as to obtain a hemicellulose component. The process has the advantages that no organic solvent like acid, alkali and alcohol is needed for separation of the components of lignocellulose and the process is simple, highly efficient and clean.

Description

technical field [0001] The invention belongs to the fields of high-value utilization of biomass resources and biochemical industry, and relates to a green process that can realize the separation of lignocellulose components without adding any organic solvents such as acids, alkalis and alcohols. Background technique [0002] Energy security is an important factor related to a country's political stability and sustainable economic development. Finding clean and renewable energy to replace traditional fossil energy has become a hot research topic worldwide. As the most abundant renewable organic energy pool on earth, lignocellulosic biomass can produce a variety of clean biofuels and bio-based chemicals, and will play an increasingly important role in the future energy structure. However, the structure of lignocellulose is compact and complex, and it is difficult for microorganisms and biological enzymes to degrade it, and the structure and components of lignocellulose from di...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C5/00
CPCD21C5/00
Inventor 刘云
Owner BEIJING UNIV OF CHEM TECH
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