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Method for efficiently separating lignin

A lignin and high-efficiency technology, used in textiles and papermaking, pulping with organic solvents, fiber raw material processing, etc., can solve problems such as inability to obtain relevant structural information, and achieve the effect of improved yield, clean and efficient separation

Active Publication Date: 2015-04-01
BEIJING FORESTRY UNIVERSITY
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  • Description
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Problems solved by technology

However, when using this method, the relevant structural information of some alkali-sensitive linkages originally contained in the lignin sample will not be available in the subsequent structural characterization

Method used

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  • Method for efficiently separating lignin
  • Method for efficiently separating lignin
  • Method for efficiently separating lignin

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Embodiment Construction

[0032] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.

[0033] The wood powder raw material in this example is fast-growing triploid Populus tomentosa, three-year-old, collected from Shandong Province. The raw materials are crushed and passed through a 0.8mm sieve, extracted with phenylalcohol at a volume ratio (2:1) for 6 hours, and dried samples of 80-100 mesh are taken after dewaxing for use. Ionic liquid [C 2 mim]OAc was purchased from Lanzhou Institute of Chemical Physics with a purity of ≥98.5%. Cellulase (Celluclast 1.5L) and β-glucosidase were purchased from Sigma Aldrich. All other reagents used were of analytical grade or reagent grade and were directly purchased and used without further purification.

[0034] figure 1 It is a schematic flow chart of the method for efficiently separating lignin of the present invention. Such ...

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Abstract

The invention discloses a method for efficiently separating lignin. The method comprises the following steps: a. dissolving dewaxed wood powder in liquid to obtain ionic liquid solution; b. transferring the ionic liquid solution to a reverse-phase solvent for regeneration; c. filtering the ionic liquid solution regenerated with the reverse-phase solvent, and freeze drying to obtain regenerated wood powder; d. carrying out mild alkali treatment on the regenerated wood powder obtained in the step c to obtain a lignin component, a hemicellulose component and residue after alkali treatment; and e. carrying out enzyme hydrolysis on the residues after alkali treatment, and filtering to obtain the lignin component. According to the method for efficiently separating lignin, the separating effect of lignin is improved.

Description

technical field [0001] The invention relates to the technical field of lignocellulose separation, in particular to a method for efficiently separating lignin. Background technique [0002] With the decrease of oil resources, the continuous rise of oil prices and people's widespread concern about environmental issues, lignocellulosic resources have become an ideal substitute for petrochemical resources. The main components of lignocellulosic raw materials are cellulose (35%-50%), hemicellulose (20%-40%) and lignin (15%-25%). In the lignocellulosic raw material, these three main components constitute the supporting skeleton of the plant body, in which the cellulose constitutes microfibers and constitutes the network skeleton of the fiber cell wall, while hemicellulose and lignin are covalently bonded and filled in the fiber Between the microfibers, a "concrete structure" similar to the interlacing of reinforced concrete is formed. For the needs of research or application, it...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21C3/20D21C5/00C08H7/00
Inventor 袁同琦许凤孙润仓张利鸣孙少妮
Owner BEIJING FORESTRY UNIVERSITY
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