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Method for esterification of fiber material and esterification material

A fiber material, esterification technology, applied in wood treatment, wood processing equipment, wood treatment details, etc., can solve the problems of separation, recycling and reuse difficulties, low qualified rate of finished products, long drying cycle, etc., and achieve good dimensional stability. , The effect of high esterification rate and high added value

Active Publication Date: 2016-01-20
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

[0004] Although the addition of the catalyst improves the speed of the esterification reaction, it also causes great difficulties for the subsequent separation, recycling and reuse, and the drying period in the later stage of the esterification wood treatment process of the prior art is long, and wood warping is prone to occur , internal cracks and other drying defects, resulting in a low pass rate of finished products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] (1) The specification is 2000mmx200mmx30mm (longitudinal x chord x radial) (the density is 0.56g / cm 3 ), the larch boards with a moisture content of 10% by weight are neatly stacked in a heatable high-pressure tank, the high-pressure tank is closed, and the vacuum is started, so that the inside of the high-pressure tank reaches a negative pressure of 0.096MPa, keeping 60min;

[0047] (2) Then under vacuum, inject the mixed fluid of acetic anhydride and acetic acid into the high-pressure tank (the volume ratio of the fluid to the plate is 3:1), the acetic acid in the fluid accounts for 15% by volume, and the acetic anhydride accounts for 85% by volume. Then continue heating to keep the temperature of the fluid inside the high-pressure tank at 140°C, and at the same time keep the internal pressure of the high-pressure tank at 1MPa for 5 hours;

[0048] (3) Then through the cold water circulation system of the high-pressure tank, the temperature of the fluid in the high-p...

Embodiment 2

[0051] (1) Poplar planks (density 0.39g / cm 3 ) neatly stacked in a heatable high-pressure tank, close the high-pressure tank, and start vacuuming, so that the inside of the high-pressure tank reaches a negative pressure of 0.096MPa and maintain it for 30 minutes;

[0052] (2) Then under the action of vacuum, inject the mixed fluid of acetic anhydride and acetic acid into the high-pressure tank (the volume ratio of the fluid to the plate is 2:1), the acetic acid in the fluid accounts for 10% by volume, and the acetic anhydride accounts for 90% by volume. Then continue heating to keep the temperature of the fluid inside the high-pressure tank at 120°C, and at the same time keep the internal pressure of the high-pressure tank at 0.8MPa for 4 hours;

[0053] (3) Then through the cold water circulation system of the high-pressure tank, the temperature of the fluid in the high-pressure tank is reduced to 25°C, the fluid is discharged, the plate is moved into the high-frequency vacuu...

Embodiment 3

[0056] (1) The eucalyptus board (density 0.60g / cm 3 ) neatly stacked in a heatable high-pressure tank, close the high-pressure tank, and start vacuuming, so that the inside of the high-pressure tank reaches a negative pressure of 0.096MPa, and keep it for 60 minutes;

[0057] (2) Then under the action of vacuum, inject the mixed fluid of acetic anhydride and acetic acid into the high-pressure tank (the volume ratio of the fluid to the plate is 5:1), the acetic acid in the fluid accounts for 20% by volume, and the acetic anhydride accounts for 80% by volume. Then continue heating to keep the temperature of the fluid inside the high pressure tank at 130°C and at the same time keep the internal pressure of the high pressure tank at 1.2MPa for 6 hours;

[0058] (3) Then through the cold water circulation system of the high-pressure tank, the temperature of the fluid in the high-pressure tank is reduced to 25°C, the fluid is discharged, the plate is moved into the high-frequency va...

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Abstract

The invention provides an esterification method of a fibrous material. The method comprises the following steps of contacting the fibrous material with a fluid containing acetic oxide to obtain contacted material, wherein the contacting condition is as follows: the pressure is 0.1-2.0MPa and the temperature is 60-140 DEG C, and the volume ratio of the fluid containing acetic oxide to the fibrous material is (1-10) to 1. The invention provides an esterification material obtained by esterification of the fibrous material through the esterification method. The esterification method of the fibrous material provided by the invention has the advantages that the fibrous material and the fluid containing acetic oxide are contacted, the dosage of the fluid in a contacting process is reasonably controlled, and the fluid is heated and pressed, so that the fibrous material and the acetic oxide are subjected to esterification reaction. According to the method provided by the invention, the esterification of the fibrous material is well performed without the action of any catalyst, the obtained esterification material has high esterification rate, the added value of the esterification material is obtained, and the fibrous material is used for manufacturing doors and windows, outdoor deck floors, escalators, fences and the like.

Description

technical field [0001] The invention relates to a method for esterifying fiber materials and an esterified material obtained by esterifying the method of the invention. Background technique [0002] Using acetic anhydride to esterify wood can significantly improve the dimensional stability and corrosion resistance of wood, thereby prolonging the service life of wood products and saving wood resources. [0003] The existing acetic anhydride esterification wood treatment process mostly uses solvents such as xylene or chlorinated hydrocarbons as diluents, and uses pyridine, sulfuric acid or anhydrous magnesium perchlorate as catalysts to contact wood with acetic anhydride for esterification. to fulfill. [0004] Although the addition of the catalyst improves the speed of the esterification reaction, it also causes great difficulties for the subsequent separation, recycling and reuse, and the drying period in the later stage of the esterification wood treatment process of the p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27K5/00
Inventor 刘君良秦特夫柴宇博储富祥黄洛华孙柏玲
Owner INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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