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Method for extracting and processing lavender essential oil

A technology of lavender essential oil and lavender flower, which is applied in the directions of essential oil/spice, fat production, etc., can solve the problems of quality influence, organic solvent residue of essential oil, low extraction rate, etc., achieves less impurity content, prevents chemical residues, and has obvious effect. Effect

Inactive Publication Date: 2013-03-13
陈和平
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the extraction methods of lavender essential oil are generally steam distillation and organic solvent extraction. The former is the most common. This method has simple equipment, easy operation and low cost. However, the temperature is too high when extracting the essential oil, which will cause the production of heat-sensitive substances in the essential oil. Decomposition, and hydrolysis of easily hydrolyzed components, the resulting essential oil has low purity, high impurity content, and low extraction rate, generally between 0.8% and 1.2%, and cannot be used directly. It must be purified, detoxified, and concentrated. Secondary processing and finishing can be used
Although the latter has a relatively high extraction rate of 2%-3%, there are organic solvent residues in the extracted essential oils, which greatly affects the quality, and the recovery of organic solvents is also a big problem, involving safety and environmental factors

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0018] Weigh 100g of lavender flowers, crush them to 30 mesh, put them into an extraction tank, and pass in CO 2 Gas, turn on the high pressure pump to pressurize to 22MPa, CO 2 Circulate extraction at a flow rate of 25L / h, the temperature of the extraction tank is 45°C, and the extraction time is 1 hour.

[0019] The extracted CO 2 The fluids are respectively introduced into the separation tank 1 and the separation tank 2. The pressure of the separation tank 1 is 7 MPa and the temperature is 40 ° C, and the pressure of the separation tank 2 is 5 MPa and the temperature is 35 ° C.

[0020] Collect lavender wax from separation kettle 1 respectively, yield rate is 0.31%, is 0.31g. Collect lavender essential oil from separating still 2, yield rate is 4.50%, is 4.50g.

example 2

[0022] Weigh 100g of lavender flowers, crush them to 20 meshes, put them into an extraction tank, and inject CO 2 Gas, turn on the high pressure pump to pressurize to 16MPa, CO 2 The extraction was carried out at a flow rate of 20 L / h, the temperature of the extraction tank was 35°C, and the extraction time was 3 hours.

[0023] The extracted CO 2 The fluid is poured into the separation kettle 1 and the separation kettle 2 respectively, the pressure of the separation kettle 1 is 8MPa, the temperature is 50°C, the pressure of the separation kettle 2 is 6MPa, and the temperature is 40°C.

[0024] Collect lavender wax from separation kettle 1 respectively, yield rate is 0.29%, is 0.29g. Collect lavender essential oil from separating still 2, yield rate is 4.15%, is 4.15g.

example 3

[0026] Weigh 100g of lavender flowers, crush them to 40 mesh, put them into an extraction tank, and pass in CO 2 Gas, turn on the high pressure pump to pressurize to 28MPa, CO 2 Circulate extraction at a flow rate of 15L / h, the temperature of the extraction tank is 55°C, and the extraction time is 2 hours.

[0027] The extracted CO 2 The fluid is poured into the separation kettle 1 and the separation kettle 2 respectively, the pressure of the separation kettle 1 is 6MPa, the temperature is 30°C, the pressure of the separation kettle 2 is 4MPa, and the temperature is 30°C. Collect lavender wax from separation kettle 1 respectively, yield rate is 0.32%, is 0.32g. Collect lavender essential oil from separating still 2, yield rate is 4.22%, is 4.22g.

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Abstract

The invention relates to a method for extracting and processing lavender essential oil, belonging to the technical field of preparation of lavender essential oil. The method comprises the following steps: (1) pulverizing lavender flowers to 10-40 meshes, filling into an extraction tank of which the temperature is 35-55 DEG C, introducing supercritical CO2 gas into the extraction tank at the flow rate of 15-25 L / hour, and extracting under the pressure of 16-28 MPa for 1.0-3.0 hours; and (2) introducing the CO2 gas after extracting the lavender essential oil into a separation kettle 1 and a separation kettle 2 to carry out separation, and respectively collecting lavender wax lavender essential oil at the separation kettle 1 and the separation kettle 2, wherein the pressure and temperature of the separation kettle 1 are respectively 6-8 MPa and 30-50 DEG C, and the pressure and temperature of the separation kettle 2 are respectively 4-6 MPa and 30-40 DEG C.

Description

technical field [0001] The present invention relates to a kind of supercritical CO 2 A method for preparing lavender essential oil by fluid extraction technique. Background technique [0002] Lavender is the dry aerial part of Lavender angustifolia. Because of its aromatic smell, it is often used as a raw material for fragrances, insect repellents and perfumes. Modern pharmacological research shows that lavender has sedative hypnotics, antibacterial and anti-inflammatory effects, scar removal, blood pressure reduction, anti-oxidation, anti-depression, anti-coagulation, anti-mutation, anti-rheumatism, anti-nociceptive pain, anti-tumor and therapeutic cardiovascular function Incomplete equal effect. At present, the extraction methods of lavender essential oil are generally steam distillation and organic solvent extraction. The former is the most common. This method has simple equipment, easy operation and low cost. However, the temperature is too high when extracting the es...

Claims

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Application Information

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IPC IPC(8): C11B9/02
Inventor 陈和平
Owner 陈和平
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