Preparing method of insect-prevention slow-release wood preservative
A wood preservative and insect-proof technology, which is applied in the direction of impregnating wood, wood impregnation, wood processing equipment, etc., can solve the problems of fast loss rate of copper-based preservatives, poor insect-proof effect, etc., and achieve high electronegativity, good adhesion, The effect of improving binding force
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example 1
[0031] Preparation of insect repellent essential oil:
[0032] Put the camphor leaves in an oven and heat up to 80°C, bake and dry until the water content is 3%, then mix and soak the dried camphor leaves and distilled water at a mass ratio of 1:7 for 2 hours, and distill the camphor leaves , the control distillation temperature is 60 ℃, and the distillation time is 1h, removes the impurity that distills out, then collects and obtains purified camphor leaf;
[0033] Mix the purified camphor leaves and safflower pyrethrum at a mass ratio of 2:1 to obtain a mixed raw material, then add the mixed raw material and absolute ethanol to the extraction kettle at a mass ratio of 20:1, and input supercritical carbon dioxide into the extraction kettle The fluid is extracted under the conditions of an extraction pressure of 6 MPa and an extraction temperature of 25°C. After extraction for 45 minutes, an extracted supercritical carbon dioxide fluid is obtained;
[0034] The extracted supe...
example 2
[0041] Preparation of insect repellent essential oil:
[0042] Put the camphor leaves in an oven and heat up to 82°C, bake and dry to a water content of 4%, then mix and soak the dried camphor leaves and distilled water at a mass ratio of 1:7 for 2.5 hours, and dry the camphor leaves. Distillation, control the distillation temperature to 62°C, and the distillation time to 1.5h, remove the distilled impurities, and then collect and obtain purified camphor leaves;
[0043] Mix the purified camphor leaves and safflower pyrethrum at a mass ratio of 2:1 to obtain a mixed raw material, then add the mixed raw material and absolute ethanol to the extraction kettle at a mass ratio of 20:1, and input supercritical carbon dioxide into the extraction kettle The fluid is extracted under the conditions of an extraction pressure of 7 MPa and an extraction temperature of 27°C. After extraction for 47 minutes, an extracted supercritical carbon dioxide fluid is obtained;
[0044] Lead the extr...
example 3
[0051] Preparation of insect repellent essential oil:
[0052] Put the camphor leaves in an oven and heat up to 85°C, bake and dry until the water content is 5%, then mix and soak the dried camphor leaves and distilled water at a mass ratio of 1:7 for 3 hours, and distill the camphor leaves , the control distillation temperature is 65 ℃, and the distillation time is 2h, removes the impurity that distills out, then collects and obtains purified camphor leaf;
[0053] Mix the purified camphor leaves and safflower pyrethrum at a mass ratio of 2:1 to obtain a mixed raw material, then add the mixed raw material and absolute ethanol to the extraction kettle at a mass ratio of 20:1, and input supercritical carbon dioxide into the extraction kettle The fluid is extracted under the conditions of an extraction pressure of 8 MPa and an extraction temperature of 28°C. After extraction for 50 minutes, an extracted supercritical carbon dioxide fluid is obtained;
[0054] The extracted supe...
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