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A device system and process for wood acetylation production

A production process and acetylation technology, which is applied in the device system and process field of wood acetylation production, and can solve the problems of separation, difficulty in recycling, long drying cycle, and low qualified rate of finished products

Active Publication Date: 2015-09-23
SHANGHAI HUAYI ENERGY CHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] 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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  • A device system and process for wood acetylation production

Examples

Experimental program
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Effect test

Embodiment 1

[0091] (1) Take 30 pieces with the specification of 2000mm×200mm×30mm (longitudinal×chord direction×radial direction) (the density is 0.56g / cm 3 ), larch boards with a moisture content of 10wt% (total volume 0.5m 3 ) are neatly stacked in the wood transport vehicle, then sent into the high-pressure acetylation tank 1, and the reaction tank is sealed; then the gas outlet 15 valve on the high-pressure acetylation tank 1 is opened, the vacuum pump 5 is turned on, and vacuum is started to make the high-pressure acetylation The inside of tank 1 reaches -0.09MPa and keeps for 60min;

[0092] (2) Inject the two streams of acetic anhydride and acetic acid into the ingredient storage tank 2, stir and mix evenly to form an acetylation reaction liquid, in which acetic acid accounts for 15wt% and acetic anhydride accounts for 85wt%; close the gas outlet of the high-pressure acetylation tank 1 15 valve, stop vacuuming, open the reaction liquid inlet valve 11 of the high-pressure acetylati...

Embodiment 2

[0098] (1) 24 pieces with a specification of 2000mm×150mm×40mm (longitudinal×chord×radial) and a density of 0.39g / cm 3 , poplar board with a moisture content of 8wt% (total volume 0.4m 3 ) are neatly stacked in the wood transport vehicle, then sent into the high-pressure acetylation tank 1, and the reaction tank is sealed; then the gas outlet 15 valve on the high-pressure acetylation tank 1 is opened, the vacuum pump 5 is turned on, and vacuum is started to make the high-pressure acetylation The inside of tank 1 reaches -0.05MPa, keep it for 100min;

[0099] (2) Close the gas outlet 15 valve of the high-pressure acetylation tank 1, and stop vacuuming; open the reaction liquid inlet 11 valve of the high-pressure acetylation tank 1, the liquid outlet valve of the ingredient storage tank 2, and the branch outlet valve of the mother liquor collection tank 7 B, then turn on the liquid delivery pump 3 to mix the acetylation reaction liquid formed by mixing the acetic anhydride in t...

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Abstract

The invention relates to a device system for acetylation production of wood and a wood acetylation production process utilizing the device system. The device system comprises a material storage tank, a liquid delivery pump, a heat exchanger I, a heat exchanger II, a high-pressure acetylation tank, a condenser, a gas-liquid separation tank, a vacuum pump and a mother liquor collecting tank. In the process of carrying out wood acetylation by utilizing the device system, after acetylation processing is carried out by external circulating heating of acetylation reaction liquid, a special deodorizing process is combined. Compared with an existing device system and an existing wood acetylation production process, the device system and the process have the characteristics that a catalyst is not used; a conditioning fluid can be recycled; reaction time is short; the reaction process is easy to control; and the result reproducibility is good.

Description

technical field [0001] The invention relates to a device system and process for wood acetylation production, in particular to a device system and process for producing acetylation treatment and deodorization drying with good dimensional stability and environment-friendly. Background technique [0002] Chemical modification of wood can be defined as the process of attaching a simple active substance to wood cell wall polymers, with or without a catalyst, forming a covalent bond between the two, thereby improving the properties of wood. Many chemical reactions related to chemical modification of wood have been published, but except for wood acetylation, other wood chemical modification technologies have not yet completed their research stage. [0003] The efficiency of chemical modification of solid wood is measured by the penetration of reactants into the cell wall. When liquid acetic anhydride reacts with wood at about 4% acetyl weight gain (WPG), more acetyl groups are dis...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27K3/10B27K3/36
Inventor 周志宏顾卫忠李俊岭崔伟高贵林王培新刘文艳刘君良储富祥秦特夫柴宇博
Owner SHANGHAI HUAYI ENERGY CHEM
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