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Method for co-production of furfural and glue-free fiberboards by using reeds

A technology of fiberboard and furfural, which is applied in the field of furfural co-production of non-adhesive fiberboard from reeds, can solve the problems of underutilization of hemicellulose, uneven distribution of laccase enzyme activity, and long microbial growth cycle, so as to facilitate equipment selection, The effect of increasing the content of active groups and improving work efficiency

Active Publication Date: 2019-12-10
SICHUAN GOLDEN ELEPHANT SINCERITY CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method does not require an external adhesive, the production efficiency of the press plate is low due to the long microbial growth cycle, and the uneven distribution of laccase activity can easily lead to product instability.
Simultaneously these methods fail more valuable utilization of reed raw material
Another problem is that hemicellulose is not fully utilized during processing

Method used

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  • Method for co-production of furfural and glue-free fiberboards by using reeds
  • Method for co-production of furfural and glue-free fiberboards by using reeds
  • Method for co-production of furfural and glue-free fiberboards by using reeds

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] A method for preparing furfural co-production glue-free fiberboard from reeds, comprising the following steps:

[0059] (1) The raw material reed is fractured and cut into sections to make the length 20-40mm;

[0060] (2) by wind conveying, the reed leaves, reed flowers and flute membrane impurities in the reeds are separated, and the remaining reeds are raw materials for steam explosion;

[0061] (3) adding mass concentration to the reed steam explosion raw material obtained in step (2) is 1% dilute acetic acid, mix homogeneously with a mixer and maintain 30 minutes, the solid-to-liquid ratio in the mixer is 1:6; the mixer is Ribbon mixer or tumble mixer. Then the reed after the mixed acid is sent into the steam blaster for instant blasting. The conditions for instant blasting in the steam blaster are: steam pressure 1.4Mpa, temperature 180-200°C, holding time 8 minutes; the material after steam explosion is made into 24wt % thick pulp, grind into fluffy fibrous form...

Embodiment 2

[0071] A method for extracting xylose by reed steam explosion to prepare furfural, comprising the following steps:

[0072] (1) The raw material reed is fractured and cut into sections to make the length 20-40mm;

[0073] (2) by wind conveying, the reed leaves, reed flowers and flute membrane impurities in the reeds are separated, and the remaining reeds are raw materials for steam explosion;

[0074] (3) adding concentration to the reed steam explosion raw material obtained in step (2) is 1% dilute acetic acid, mix uniformly with a mixer and maintain 30 minutes, the solid-liquid ratio in the mixer is 1:6; Ribbon mixer or tumble mixer. Then the reed after the mixed acid is sent into the steam blaster for instant blasting in the steam blaster. The conditions for instant blasting in the steam blaster are: steam pressure 1.4Mpa, temperature is 180-200°C, and the maintenance time is 8 minutes; % thick pulp, grind into fluffy fibrous form with high consistency mill, and then wash...

Embodiment 3

[0082] The operating conditions are the same as in Example 1, except that the concentration of the xylose solution is changed to 24%.

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Abstract

The invention belongs to the field of comprehensive utilization of crop straw resources, and particularly relates to a method for co-production of furfural and glue-free fiberboards by extracting xylose through steam explosion of reeds. The method comprises the following steps: (1) carrying out fracturing and sectioning; (2) carrying out winnowing; (3) after dilute acetic acid pretreatment, carrying out squeezing and dewatering, then carrying out steam explosion after the squeezing and dewatering, and washing materials after the steam explosion; (4) removing a water extract to a fractionatingtower, and separating formic acid, acetic acid and a furfural aqueous solution by electrodialysis; (5) carrying out microfiltration on a reducing sugar mixture after fermentation; (6) carrying out reverse osmosis; (7) obtaining the furfural; (8) obtaining a mixture containing solid cellulose, lignin and a small amount of hemicellulose, and carrying out drying after treatment; and (9) preparing theglue-free fiberboards. According to the method, the high-pressure steam explosion is adopted, so that the hemicellulose in the reeds is easily hydrolyzed into monosaccharide or oligosaccharide undera relatively low-temperature steam explosion condition, the steam explosion temperature is lowered, further degradation of pentose sugars such as xylose is reduced, and the utilization rate of the reeds is improved.

Description

technical field [0001] The invention belongs to the field of comprehensive utilization of crop straw resources, and relates to a process technology for producing furfural through co-production of crop straw, especially focusing on the method of directly preparing furfural and remaining solid matter to make glue-free fiberboard from steam-exploded water-washed materials of crop straw, specifically a reed A method for preparing furfural co-production glue-free fiberboard. Background technique [0002] With the increasingly tight supply of wood, the search for wood substitute raw materials has received more and more attention. Studies have proved that reed can replace wood for the production of wood-based panels. my country has relatively sufficient reed resources, and the distribution area is very wide. There are as many as 14 main reed producing areas. Previously, reeds were used as raw materials for papermaking, and had no other industrial uses. The felled reeds were disca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27N3/12B27N3/18B27N3/20C07D307/50
CPCB27N3/12B27N3/18B27N3/203C07D307/50
Inventor 唐印郭志刚雷林刘朝慧李旭初武长安李刚王明权
Owner SICHUAN GOLDEN ELEPHANT SINCERITY CHEM CO LTD
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