Pine acid degreasing method

A pine wood and acid technology, applied in the direction of impregnated wood, wood impregnation, wood processing equipment, etc., can solve the problems of great variation, difficulty in the permeability of degreasing liquid, and difficult to accurately reflect the permeability of degreasing liquid of large-size specimens. Small drop in physical and mechanical properties, low production cost, and easy-to-achieve effects

Inactive Publication Date: 2009-08-26
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Secondly, because it is difficult to measure the degreasing fluid permeability coefficient of large-sized specimens in practice, and the current research on degreasing penetration is based on laboratory-scale small-sized specimens, and the variation of degreasing fluid permeability is extremely large. The degreasing fluid permeability of large-sized specimens has certain limitations in practical applications, and it is difficult to accurately reflect the actual degreasing fluid permeability characteristics of large-sized specimens

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1), preparation of degreasing liquid: according to m 甲酸 :m 次氯酸 :m 磷酸 :m 硅酸钠 = 1:8:2:1.0 mixed, and then made into an aqueous solution with a mass percentage concentration of 1%, and made into a degreasing liquid;

[0022] (2), canning: according to V 松木 / V 脱脂液 =1:10, put the degreasing liquid and pine board into the high-pressure degreasing tank (the degreasing tank requires resistance to 3MPa pressure, acid resistance and oxidation resistance);

[0023] (3) Degreasing treatment: heat up to 55°C at the fastest speed, keep it warm for 8 hours, make the degreasing depth reach 0.8-2cm, and keep the color of fresh pine wood; then drain the liquid and recover the rosin; after draining the liquid, open the degreasing tank, just unload the pine wood. After degreasing, the degreasing rate is not less than 60%, the color of pine wood is fresh, and the physical and mechanical properties are not more than 10%.

Embodiment 2

[0025] (1), preparation of degreasing liquid: according to m 甲酸 :m 次氯酸钠 :m 磷酸 :m 硅酸钠 = 2: 6.5: 1.45: 0.5 mixed, then made into an aqueous solution with a concentration of 5% by mass percentage, and made into a degreasing liquid;

[0026] (2), canning: according to V 松木 / V 脱脂液 =1:4, put the degreasing liquid and pine board into the high-pressure degreasing tank (the degreasing tank requires resistance to 3MPa pressure, acid resistance and oxidation resistance).

[0027] (3) Degreasing treatment: raise the temperature to 85°C at the fastest speed, keep it warm for 6 hours, make the degreasing depth reach 0.8-2cm, and keep the color of fresh pine wood; then drain the liquid and recover the rosin; after draining the liquid, open the degreasing tank, just unload the pine wood. After degreasing, the degreasing rate is not less than 60%, the color of pine wood is fresh, and the physical and mechanical properties are not more than 10%.

Embodiment 3

[0029] (1), preparation of degreasing liquid: according to m 甲酸 :m 次氯酸 :m 磷酸 :m 硅酸钠 = 3:2:1:0.1 mixed, and then made into an aqueous solution with a mass percentage concentration of 0.1%, and made into a degreasing liquid;

[0030] (2), canning: according to V 松木 / V 脱脂液 =1:0.1, put the degreasing liquid and pine board into the high-pressure degreasing tank (the degreasing tank requires resistance to 3MPa pressure, acid resistance and oxidation resistance).

[0031] (3) Degreasing treatment: heat up to 105°C at the fastest speed, keep it warm for 4 hours, make the degreasing depth reach 0.8-2cm, and keep the color of fresh pine wood; then drain the liquid and recover the rosin; after the liquid is drained, open the degreasing tank, just unload the pine wood. After degreasing, the degreasing rate is not less than 60%, the color of pine wood is the color of fresh wood, and the change of physical and mechanical properties is not more than 10%.

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Abstract

The invention discloses an acidic degreasing method for pine wood, which comprises the following steps: (1) preparing a degreasing liquid; (2) filling in cans; (3) degreasing treatment. The invention can make the degreasing depth of one side of the pine wood reach 0.8-2 cm, keep the fresh wood color of the pine wood, reduce the physical and mechanical properties less, and fully meet the requirements of furniture. The invention has the advantages of easy realization, convenient operation, and low production cost. More importantly, the technology does not produce waste water, increases the added value of pine wood, creates jobs, and is conducive to promoting the harmonious development of artificial forest resources, ecology, and society.

Description

technical field [0001] The invention relates to a method for acidic degreasing of pine wood, in particular to a method for removing pine resin with an acidic degreasing solution. Background technique [0002] At present, the degreasing methods of various pine woods are slightly different due to their different material properties, rosin content and inclusions, but the current pine wood degreasing methods and technologies can be summarized into five types: (1) lye saponification method, (2) solvent Extraction method, (3) catalytic polymerization method, (4) high temperature drying method, (5) vacuum drying method. [0003] Generally, in order to improve the degreasing effect, two or more degreasing methods are often combined, but the manufacturers are not ideal in practical applications. For example, the pine wood processed by lye saponification has low degreasing rate, easy to change color, dull luster, and the problem of waste water has not been fundamentally solved, which...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27K3/10B27K3/52
Inventor 彭万喜李年存侯海郑真真
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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