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A method for extracting tea tree oil by microwave radiation

A technology of microwave radiation and tea tree oil, which is applied in the direction of essential oil/fragrance, fat production, etc., can solve the problems of large equipment investment, high impurity dissolution rate, and restriction of technology promotion, and achieve low operating costs, simple equipment structure, and highly operable effect

Inactive Publication Date: 2011-12-07
AGRI PRODS PROCESSING RES INST CHINESE ACAD OF TROPICAL AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the main extraction method of tea tree oil is steam distillation, some of which use solvent extraction, but these methods have the disadvantages of low extraction efficiency, high impurity dissolution rate, large amount of solvent used, and large environmental pollution. Most of them are terpenes, which are easy to oxidize and other problems
New extraction methods such as CO 2 The extraction effect of supercritical extraction is better than that of traditional methods, but there are problems such as large investment in equipment and high operating costs, which limit the promotion of its technology

Method used

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  • A method for extracting tea tree oil by microwave radiation

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Effect test

Embodiment 1

[0021] (1) Take by weighing 100g of fresh Melaleuca alternifolia branches and leaves, add 200g of n-hexane, put it into a microwave reactor, and install a condenser;

[0022] (2) Set the microwave power to 800W, the temperature to 40°C, extract with microwave radiation for 5 seconds each time, carefully pour out the supernatant after cooling, and then add an appropriate amount of n-hexane to repeat the extraction for 5 times;

[0023] (3) merging the extract obtained by step (2), and concentrating under reduced pressure with a rotary evaporator to obtain the crude product of tea tree oil essential oil;

[0024] (4) Dissolve with absolute ethanol, freeze in -15°C refrigerator for 48 hours, centrifuge to remove flocculent impurities, filter, and use a rotary evaporator to concentrate the filtrate under reduced pressure to obtain tea tree oil essential oil.

Embodiment 2

[0026] (1) Take by weighing fresh Melaleuca alternifolia branch and leaf 100g, add 1000g ethanol, put into microwave reactor, load onto condenser;

[0027] (2) Set the microwave power to 300W, the temperature to 60°C, extract with microwave radiation for 2 minutes each time, carefully pour out the supernatant after cooling, and then add an appropriate amount of ethanol to repeat the extraction for 5 times;

[0028] (3) merging the extract obtained by step (2), and concentrating under reduced pressure with a rotary evaporator to obtain the crude product of tea tree oil essential oil;

[0029] (4) Dissolve with absolute ethanol, freeze in -12°C refrigerator for 24 hours, centrifuge to remove flocculent impurities, filter, and use a rotary evaporator to concentrate the filtrate under reduced pressure to obtain tea tree oil essential oil.

Embodiment 3

[0031] (1) Take by weighing 100g of fresh Melaleuca alternifolia branches and leaves, add 500g propanol, put into a microwave reactor, and install a condenser;

[0032] (2) Set the microwave power to 350W, the temperature to 80°C, extract with microwave radiation for 20 minutes each time, carefully pour out the supernatant after cooling, and then add an appropriate amount of propanol to repeat the extraction for 3 times;

[0033] (3) merging the extract obtained by step (2), and concentrating under reduced pressure with a rotary evaporator to obtain the crude product of tea tree oil essential oil;

[0034] (4) Dissolve with absolute ethanol, freeze in -18°C refrigerator for 30 hours, centrifuge to remove flocculent impurities, filter, and use a rotary evaporator to concentrate the filtrate under reduced pressure to obtain tea tree oil essential oil.

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Abstract

The invention relates to a method for preparing essential oil, in particular to a method for extracting tea tree oil from Melaleuca alternifolia. A method for extracting tea tree oil by microwave radiation, adding a certain amount of extractant to the weighed fresh Melaleuca alternifolia branches and leaves, putting it into a microwave reactor, setting the microwave power and temperature, extracting for a certain period of time, and extracting The tea tree oil is concentrated, then centrifuged, filtered, and concentrated to obtain the tea tree oil essential oil; the equipment used in the present invention has a simple structure, the active ingredient tea tree oil is extracted thoroughly, and the operation cost is low; The design of power and microwave radiation time is reasonable, the operability is strong, the amount of organic solvent is small, the environmental pollution is small, and industrialized large-scale production can be realized.

Description

【Technical field】 [0001] The invention relates to a method for preparing essential oil, in particular to a method for extracting tea tree oil from Melaleuca alternifolia. 【Background technique】 [0002] Tea tree oil (Tea tree oil) should be called Melaleuca alternifolia oil according to the botanical definition, it is mainly obtained from the fresh branches and leaves of Melaleuca alternifolia (Melabeuca alternifolia) plant of Myrtaceae through steam distillation Color to light yellow essential oil, the essential oil is called Australian tea tree oil, which was included in the European Pharmacopoeia in 2001. People have used tea tree oil as a medicine for a long time. During World War II, it was widely accepted as an important medicine for the treatment of soldiers' skin injuries. Studies have shown that tea tree oil has broad-spectrum antibacterial, antifungal, antiviral and anti-inflammatory activities, can effectively prevent oral, skin, and urinary system infections, tr...

Claims

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Application Information

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IPC IPC(8): C11B9/02
Inventor 唐永富李积华曹玉坡陈家翠
Owner AGRI PRODS PROCESSING RES INST CHINESE ACAD OF TROPICAL AGRI SCI
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