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Method for preparing furfural and co-producing fiberboard by extracting xylose through reed steam explosion

A fiberboard and reed technology, applied in the field of plant extraction, can solve the problems of uneven distribution of laccase enzyme activity, long growth cycle of microorganisms, low production efficiency of pressing plate, etc., and achieve the effects of saving steam, good comprehensive utilization and low cost of raw materials

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

Method used

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  • Method for preparing furfural and co-producing fiberboard by extracting xylose through reed steam explosion
  • Method for preparing furfural and co-producing fiberboard by extracting xylose through reed steam explosion
  • Method for preparing furfural and co-producing fiberboard by extracting xylose through reed steam explosion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] A method for extracting xylose by reed steam explosion to prepare furfural, comprising the following steps:

[0077] 1) Raw reeds (water content 40wt% or fresh reeds) are fractured and cut into sections with a length of 20-40mm;

[0078] 2) Conveying by wind, while separating impurities such as reed leaves, reed flowers and flute membranes, it is the raw material for steam explosion;

[0079] 3) Add dilute sulfuric acid with a concentration of 0.3wt% to the above-mentioned raw materials, the solid-to-liquid ratio is 1:0.8, and mix evenly with a ribbon mixer; after mixing for 30 minutes, press to make the water content of the treated reed 45wt%. Send it into the steam blaster, under the steam pressure of 1.6Mpa and the temperature of 180°C, hold it for 120 seconds, and explode instantly.

[0080] After the steam explosion, the material is washed with 10 times the mass of hot water at 70°C in a continuous pulp washer, and then pressed and dehydrated to obtain a mixture o...

Embodiment 2

[0091] A method for extracting xylose by reed steam explosion to prepare furfural, comprising the following steps:

[0092] 1) Raw reeds are crushed and cut into sections, with a length of 20-40mm;

[0093] 2) Conveying by wind, while separating impurities such as reed leaves, reed flowers and flute membranes, it is the raw material for steam explosion.

[0094] 3) Add dilute sulfuric acid with a concentration of 0.3% (wt / wt) to the above-mentioned steam explosion raw materials, the solid-to-liquid ratio is 1:0.8, and mix evenly with a mixer; the mixer can be a ribbon type or a drum type, Maintain for 30 minutes and press to make the water content of the treated reed 45wt%. Send it into a steam blaster at a steam pressure of 1.6Mpa and a temperature of 180°C for 120 seconds to explode instantly.

[0095] After the steam explosion, the material is washed with 10 times of 70°C hot water in a continuous pulp washer, and then pressed and dehydrated to obtain a mixture of solid c...

Embodiment 3

[0106] Reeds are not subjected to steam explosion treatment, and fiberboards are produced by conventional methods.

[0107] The above three examples were made of MDF under the same conditions and tested according to the GB / T11718-009 standard. The comparison results are as follows:

[0108]

[0109]

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Abstract

The invention belongs to the field of plant extraction, relates to a reed high-added-value utilization technology, and in particular, relates to a method for preparing furfural and co-producing a fiberboard by extracting xylose through reed steam explosion. The method comprises the following steps: 1) fracturing and cutting raw material reeds into sections; 2) removing impurities; 3) carrying outsteam explosion treatment, and washing the treated material with water; 4) feeding a water washing liquid into a fractionating tower, collecting an aqueous solution containing formic acid, acetic acidand furfural from the tower top, and separating the formic acid, acetic acid and furfural aqueous solution by electrodialysis; and obtaining a reducing sugar mixture at the tower bottom; 5) adding yeast, fermenting, and then performing microfiltration to remove glucose to obtain a mixed solution containing xylose and arabinose; 6) performing reverse osmosis membrane concentration; and 7) preparing furfural, and preparing the fiberboard from remaining matters. According to the method, pentosan in the raw material reed is degraded into xylose through steam explosion without adding acid, water extraction is adopted for recycling, acid pollution is avoided, and economic benefits are obvious; the obtained xylose aqueous solution is used for producing furfural through a solvent method, the yield is high, steam is saved, and pollution is small.

Description

technical field [0001] The invention belongs to the field of plant extraction and relates to high value-added utilization technology of reeds, in particular to a method for extracting xylose by steam explosion of reeds to prepare furfural co-production fiberboards. 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 discarded or burned, which brought certain pressure to the environment in the production area. The development of reed wood-based panels is of great significance, which can alleviate the contradiction between wood ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21B1/36B27N3/12B27N1/02C07D307/50
CPCB27N1/0209B27N3/12C07D307/50D21B1/36
Inventor 雷林郭志刚唐印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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