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Rapid liquefying method for wood

A wood and fast technology, applied in wood processing, wood processing appliances, wood processing details, etc., can solve the problems of high residue rate, time-consuming and energy consumption of wood liquefaction reaction

Inactive Publication Date: 2012-05-23
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

But in the early stage of wood liquefaction reaction, the whole wood liquefaction reaction system is heterogeneous, and the process of wood liquefaction system changing from heterogeneous phase to homogeneous phase takes a long time. Therefore, the traditional liquefaction method is very time-consuming and energy-consuming. , and even after a long time, the residue rate of wood liquefaction reaction is still high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] This embodiment is used to illustrate the wood rapid liquefaction method provided by the present invention.

[0029] The sweetgum powder that will pass through mesh sieve (0.15 millimeter aperture, 100 sieve holes) is air-dried to the water content in wood and is lower than 8% by weight; 100 grams of this wood powder, 200 grams of liquid phenol (20 g of water content), 20 grams of poly Ethylene glycol 400, and 3 grams of sulfuric acid (concentration of 98% by weight) and 3 grams of phosphoric acid (concentration of 85% by weight) as a catalyst were mixed, and stirred for 20 minutes with an American kitchen treasure mixer (KitchenAid stand mixer) to make it evenly mixed Take out three parts of 15 gram mixtures and join respectively in three identical 100 milliliters airtight polytetrafluoroethylene reaction tanks, under the condition of stirring, carry out heating with high-pressure microwave equipment (Milestone Ethos EX), the rate of heating is 32.5 ℃ / min, after reach...

Embodiment 2

[0051] This embodiment is used to illustrate the wood rapid liquefaction method provided by the present invention.

[0052] Air-dry the Chinese fir powder that passes through the mesh screen (0.15 mm aperture, 100 meshes) until the water content in the wood is lower than 10% by weight; 400, and 4.8 gram of sulfuric acid (concentration is 95% by weight) and 4.8 gram of phosphoric acid (concentration is 85% by weight) as catalyst are mixed, stir 20 minutes with U.S. KitchenAid stand mixer (KitchenAid stand mixer), make it mix homogeneously; Take out three A portion of 15 grams of the mixture was added to three identical 100 milliliters of airtight polytetrafluoroethylene reaction tanks, under stirring conditions, heated with high-pressure microwave equipment (Milestone Ethos EX), the rate of heating was 35 ° C / min, After reaching 130°C, continue to react, and keep at 130°C to continue to react. The three reactors reacted for 2.5 minutes, 5 minutes, and 10 minutes respectively ...

Embodiment 3

[0055] This embodiment is used to illustrate the wood rapid liquefaction method provided by the present invention.

[0056] Air-dry the poplar wood powder passing through the mesh sieve (0.15 mm aperture, 100 meshes) until the water content in the wood is lower than 12% by weight; 100 grams of wood powder, 120 grams of solid phenol, 8 grams of water, 8 grams of polyethylene glycol Alcohol 400, and 1 gram of sulfuric acid (concentration of 95% by weight) and 1 gram of phosphoric acid (concentration of 85% by weight) as a catalyst were mixed, stirred for 20 minutes with an American KitchenAid stand mixer, and mixed evenly; Three parts of 15 grams of the mixture were added to three identical 100 ml airtight polytetrafluoroethylene reaction tanks respectively, and heated with high-pressure microwave equipment (MilestoneEthos EX) under stirring conditions at a heating rate of 70° C. / min. After reaching 165°C, continue to react and keep at 165°C to continue the reaction. The three r...

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Abstract

The invention provides a rapid liquefying method for wood. The method comprises steps of: uniformly mixing wood, an acid catalyst and a liquefying agent, and heating to a temperature between 100 DEG C and 180 DEG C to proceed a wood liquefying reaction, and is characterized in that the liquefying agent comprises phenol having water and carbon atoms 6-15 in number. The heating is performed by microwave, and the wood liquefying reaction is performed in a closed reactor. According to the rapid liquefying method for the wood provided by the invention, not only the liquefaction of the wood can be rapidly realized, but also the residue rate of the wood liquefying reaction is very low.

Description

technical field [0001] The invention relates to a wood rapid liquefaction method. Background technique [0002] Wood has many excellent physical and chemical properties, environmental characteristics and good processing performance, but it is also a kind of insoluble and infusible natural polymer material, which cannot be processed by heating and pressure like plastic, metal and glass. Therefore, the reprocessing and deep utilization of wood are limited to a certain extent. Later studies found that the liquefaction of wood can be achieved by chemically treating wood with chemical reagents under normal or high pressure conditions. After liquefaction, chemical components such as cellulose, hemicellulose and lignin in wood are converted into liquid substances with certain fluidity, which can be used as adhesives, polyurethane foams, phenolic molding plastics, fibers and carbon fibers, etc. The raw material of new polymer materials makes the utilization rate of wood reach 100%...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27K5/00
Inventor 李改云许忠允秦特夫
Owner INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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