Method for liquefying wood

A wood and water solution technology, applied in wood treatment, wood processing equipment, wood treatment details, etc., can solve the problems of not being able to achieve mild liquefaction conditions at the same time, harsh liquefaction conditions, mild liquefaction conditions, etc., to reduce the difficulty of liquefaction and reduce liquefaction. Residue rate, effect of reducing requirements

Inactive Publication Date: 2007-09-12
INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the shortcoming that the wood atmospheric pressure liquefaction method in the prior art cannot realize mild liquefaction conditions, lower residue rate and smaller liquid ratio at the same time, and provide a kind of method that can simultaneously realize mild liquefaction conditions, lower Wood Liquefaction Method with Residue Ratio and Small Liquor Ratio
[0007] In order to solve the above-mentioned problems in the prior art, the inventors of the present invention have carried out a large amount of researches, as a result, unexpectedly found that, adopting the wood of 1 wt % NaOH aqueous solution extract content not less than 30 wt % to carry out liquefaction, can reduce greatly Liquefaction is difficult, thus solving the problem of low residue rate and mild liquefaction conditions in the prior art
And the discarded wood after cultivating Poria cocos can be used as the wood that the extract content of 1% by weight NaOH aqueous solution of the present invention is not less than 30% by weight, thereby on the one hand solved the problem that wood liquefaction condition is harsher, solvent consumption is big, on the other hand On the one hand, it has also found a new way out for the waste wood after cultivating Poria cocos

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] This embodiment is used to illustrate the wood liquefaction method provided by the present invention.

[0021] 20 grams of 1% by weight NaOH aqueous solution extract content is 62.29% by weight of the masson pine powder (by 0.9 mm mesh aperture) and 40 gram of phenol and 3.2 gram of concentration is that the phosphoric acid of 85% by weight is added to the equipment equipped with stirrer, thermometer and a 500 ml three-necked flask with a reflux condenser, the three-necked flask was immersed in an oil bath preheated to 150° C. and stirred for 120 minutes to obtain a wood liquefaction product. The masson pine collection site is Taiyang Village, Heping Township, Yuexi County, Anhui Province. The Poria cocos fungus was cultivated for about 10 months after harvesting Poria cocos under conditions of 25-30° C. and relative air humidity of 60-80% humidity provided by Poria cocos growers. Abandoned masson pine brown rot wood.

[0022] Calculate the residue rate after wood liqu...

Embodiment 2

[0027] This embodiment is used to illustrate the wood liquefaction method provided by the present invention.

[0028] Carry out wood liquefaction according to the same method as Example 1, the difference is that the masson pine wood is 1% by weight NaOH aqueous solution extract content is 70.07% by weight of wood, the residue after the wood liquefaction calculated according to the method of Example 1 The rate is 1.3%. The masson pine collection site is Taiyang Village, Heping Township, Yuexi County, Anhui Province. The Poria cocos fungus was cultivated for 15 weeks under conditions of 25-30° C. and relative air humidity of 60-80% humidity provided by Poria cocos growers to remove surface layer Poria cocos hyphae and Masson pine brown rot wood after debris.

Embodiment 3

[0030] This embodiment is used to illustrate the wood liquefaction method provided by the present invention.

[0031] Carry out wood liquefaction according to the same method as Example 1, the difference is that the masson pine wood is 1% by weight NaOH aqueous solution extract content is 54.01% by weight of wood, the residue after the wood liquefaction calculated according to the method of Example 1 The rate is 3.37%. The masson pine collection site is Taiyang Village, Heping Township, Yuexi County, Anhui Province. The Poria cocos mycelium and mycelium of the surface layer are removed after cultivating Poria cocos fungi for 11 weeks under the conditions of 25-30° C. and relative air humidity of 60-80% humidity provided by Poria cocos growers. Masson pine brown rot wood after debris.

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Abstract

The timber liquefying method is to mixing timber with solvent in the presence of acid catalyst and under timber liquefying condition, with the timber accounting for not less than 30 wt% of the 1 wt% concentration water solution of NaOH as the extractant. The present invention has mild timber liquefying condition, reduced solvent consumption, greatly reduced liquefied residue rate, environment friendship and other advantages. The timber liquefying product is used for preparing adhesive, foamed polyurethane plastic, molded phenolic plastic and other polymer material.

Description

technical field [0001] The invention relates to a wood liquefaction method. Background technique [0002] Wood, as a kind of insoluble and infusible natural polymer material, cannot be processed by heating and pressure like plastic, metal and glass, so the reprocessing and deep utilization of wood are limited to a certain extent. Later research found that the products after wood liquefaction have thermal fluidity and can be used as raw materials for various new polymer materials such as adhesives, polyurethane foams, phenolic molded plastics, fibers and carbon fibers, thus broadening the application of wood field. Wood liquefaction mainly refers to the reaction of wood materials with organic solvents such as phenol, polyols, and cyclic carbonates, and the liquefaction reaction occurs under the conditions of acidic catalysts, basic catalysts, or even no catalysts, so that the cellulose, hemicellulose, and wood in the wood are liquefied. Macromolecules degrade into liquid su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27K5/00C12S3/02
Inventor 江泽慧李改云秦特夫任海青费本华虞华强
Owner INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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