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Machinery pretreatment method for dissolving lignocellulose raw material

A technology of lignocellulosic raw materials and lignocellulose, which is applied in the processing of fiber raw materials, post-processing of cellulose pulp, and modification of pulp properties, etc. big effect

Inactive Publication Date: 2016-04-06
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In the past, acids, alkali solutions and organic solvents were often used to dissolve and separate wood fibers. These solvent systems generally have problems such as heavy pollution and low recovery rates.

Method used

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  • Machinery pretreatment method for dissolving lignocellulose raw material
  • Machinery pretreatment method for dissolving lignocellulose raw material
  • Machinery pretreatment method for dissolving lignocellulose raw material

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Embodiment 1

[0029] The present embodiment is as follows: Weigh 50 g of absolute dry lignocellulosic raw material and 400 g of glycerol into a 500 mL beaker, and heat the beaker in an oil bath at 100° C. for 1 hour. After it is fully swelled, the lignocellulosic-glycerol mixture is added to the mechanical pressing device, the lignocellulose raw material and soaking liquid stay in the conical screw for 20s, and the temperature is controlled at 70°C. The screw uses a single screw to advance the lignocellulosic raw material, making it knead and impregnate continuously, destroying the bonding force between lignocellulose, making it easier to disperse lignocellulose, and continuously refine the fiber bundles. Therefore, the aspect ratio increases, the specific surface area of ​​lignocellulose increases, and the liquid absorption performance of lignocellulose is further improved. Add a small amount of H to the lignocellulosic raw material obtained by screw extrusion 2 SO 4 Carry out heating an...

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Abstract

The invention discloses a machinery pretreatment method for dissolving a lignocellulose raw material, and belongs to the field of lignocellulose processing and application, and aims at providing a machinery pretreatment process for dissolving lignocelluloses, and the machinery pretreatment process is simple and fast, and is high in efficiency. The machinery pretreatment method comprises that a, the lignocellulose raw material and an impregnating solution are mixed, and fully stirred, and are heated and swollen; b, a certain quality of the mixture of the lignocellulose raw material and the impregnating solution is conveyed to a machinery pretreatment device; c, the machinery pretreatment device continuously rubs, impregnates and extrudes the lignocellulose raw material and the impregnating solution; and d, lignocellulose is collected after being extruded and serves as a dissolving raw material. With respect to the machinery pretreatment method for dissolving the lignocellulose raw material, an existing extruding device is refitted, investment of extra complex equipment is not needed, efficient pretreatment to lignocellulose can be completed, and the comprehensive production cost of lignocellulose dissolving and processing is saved.

Description

technical field [0001] The invention belongs to the field of lignocellulose processing and application, and mainly relates to a mechanical pretreatment method for dissolving lignocellulose raw materials. Background technique [0002] At present, non-renewable resources are increasingly in short supply, and the energy crisis is becoming more and more serious. Biomass energy has become a hot spot in international research because of its advantages such as wide sources, strong renewability, and low price. Among them, lignocellulose has 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 covalen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21B1/16D21C9/00
CPCD21B1/16D21C9/002D21C9/007
Inventor 周小凡陆海龙张莉莉徐军飞
Owner NANJING FORESTRY UNIV
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