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Preparation method for novel wood preservative

A wood preservative, a new type of technology, used in the preparation of organic compounds, impregnated wood, wood impregnation, etc.

Inactive Publication Date: 2012-07-04
UNIV OF SCI & TECH LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] As mentioned above, there is no low-cost, environmentally friendly method for synthesizing tropolone for wood preservation

Method used

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  • Preparation method for novel wood preservative
  • Preparation method for novel wood preservative
  • Preparation method for novel wood preservative

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Dissolve 100.1g of cyclopentadiene in 860.0g of n-hexane solution, add 206.4g of dichloroacetyl chloride into the n-hexane solution, and then add 151.8g of triethylamine dropwise under stirring within 3 hours, At the same time, keep the temperature of the solution at 0°C, and the degree of stirring is 0.3kw / m 3 , after the dropwise addition is completed, the formed salt is dissolved with 1N hydrochloric acid, and then the organic phase is separated to obtain a n-hexane solution containing ketene adduct;

[0056] Distill out n-hexane from the n-hexane solution containing ketene adduct, then distill the residue under reduced pressure to obtain distillate of 210.6g ketene adduct;

[0057] Take the above-mentioned distillate and add it to a mixed solvent composed of 706.5g tert-butanol, 43ml water and 71.8g acetic acid, heat to reflux, drop 240.8g triethylamine, drop it in 2h, and then reflux for 6h. After the reaction is completed, 1N hydrochloric acid was added to the so...

Embodiment 2

[0059] Dissolve 100.6g of cyclopentadiene in 861.5g of n-hexane solution, add 205.8g of dichloroacetyl chloride into the n-hexane solution, and then add 152.5g of triethylamine dropwise under stirring within 3 hours, At the same time, keep the temperature of the solution at 0°C, and the degree of stirring is 0.3kw / m 3 . After the dropwise addition was completed, the formed salt was dissolved with 1N hydrochloric acid, and then the organic phase was separated to obtain a n-hexane solution containing ketene adduct;

[0060] Distill out n-hexane from the n-hexane solution containing ketene adducts, and then distill the residue under reduced pressure to obtain a distillate of 208.4 g of ketene adducts;

[0061] Take the above-mentioned distillate and add it to a mixed solvent composed of 699.5g tert-butanol, 42ml water and 70.4g acetic acid, heat to reflux, drop 238.4g triethylamine, drop it in 2h, then reflux for 6h, after the reaction is completed, 1N hydrochloric acid was add...

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Abstract

The invention relates to a preparation method for a novel wood preservative. The invention relates to a method for preparing the novel wood preservative, which comprises the following steps that: cyclopentadiene and a reaction product of dichloroacetyl chloride and triethylamine are subjected to an addition reaction to prepare a cyclopentadiene allyl ketene adduct, and the cyclopentadiene allyl ketene adduct is reacted with acetic acid, triethylamine, tert-butanol and water to prepare the novel wood preservative tropolone. The wood preservative with the concentration of 1% is used for treating wood, the decay-resistant capacity of the treated wood for wood decay fungi Trametes versicolor and Gloeophyllum trabeum reaches a strong decay-resistant level, and simultaneously the wood preservative has a mildew-proof effect.

Description

technical field [0001] The invention relates to a method for synthesizing a novel wood preservative tropolone by adopting a new reaction system. Background technique [0002] The demand for wood in modern life is increasing, and the demand for wood preservatives continues to increase. Although there are a variety of compound structures with wood preservative activity in the prior art, they are generally accompanied by one or another disadvantage, such as poor antiseptic effect and serious pollution in the production process. Therefore, there is a continuing need to develop new wood preservatives. [0003] In 1942, Harold Raistrick isolated tropolone from Penicillium stipitatum for the first time, and identified its structure in 1945 (Natural Product Reports, 2008, 25, 118-138). Tropolone is also known as tropolone, 2-hydroxyheptaaryl ketone, chemical name: 2-hydroxy-2,4,6-cycloheptatrien-1-one (2-Hydroxycyclohepta-2, 4,6-trienone), molecular formula: C 7 h 6 o 2 , mole...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27K3/50C07C49/717C07C45/76
Inventor 胡君一徐英黔李淑君张凤陈晨杨思徐乐乐
Owner UNIV OF SCI & TECH LIAONING
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