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Method for extracting lavender essential oil

A technology of lavender essential oil and an extraction method, which is applied in the field of spice extraction, can solve the problems of solvent residue, essential oil component destruction, influence on the quality of essential oil, etc., and achieves the effects of pure aroma, light color and improved separation efficiency.

Inactive Publication Date: 2014-03-12
AGATE PERFUME MINGGUANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using this method to prepare essential oils can remove waxes well, but during distillation and concentration, it is easy to cause molecular rearrangement, oxidation, hydrolysis, polymerization, etc., resulting in the destruction of essential oil components, and it may also cause solvent residues. Affect the quality of essential oil

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Referring to the above method, crush 500g of lavender flowers and put them in the extraction kettle, keep the extraction pressure at 10MPa, and the extraction temperature at 25°C; A yellow paste solid extract was obtained; the pressure of the second-stage separator was 5 MPa, and the temperature was 15°C to obtain dark yellow slightly turbid lavender crude oil with a yield of 5.3%. Crude lavender oil enters the molecular still with a flow rate of 9mL / min, the feed temperature is 30°C, the distillation pressure is 300Pa, the distillation temperature is 45°C, the speed of the scraping film is 250r / min, and the cooling temperature is 45°C to obtain a clear and transparent Light, pure aroma, the yield is 15%.

Embodiment 2

[0023] Referring to the above method, crush 490g of lavender flowers and put them in the extraction kettle, store the extraction pressure at 40MPa, and the extraction temperature at 80°C; the pressure of the first-stage rectification column is 23MPa, and the temperature is 65°C. A yellow paste solid extract was obtained; the pressure of the second stage separator was 25MPa, and the temperature was 65°C to obtain dark yellow slightly turbid lavender crude oil with a yield of 8.3%. Crude lavender oil enters the molecular still at a flow rate of 12mL / min, the feed temperature is 40°C, the distillation pressure is 500Pa, the distillation temperature is 65°C, the speed of the scraping film is 320r / min, and the cooling temperature is 45°C to obtain a clear and transparent Light and pure aroma, the yield is 23%.

Embodiment 3

[0025]Referring to the above method, crush 490g of lavender flowers and put them in the extraction kettle, keep the extraction pressure at 20MPa, and the extraction temperature at 45°C; the pressure of the first-stage rectification column is 12MPa, and the temperature is 30°C. A yellow paste solid extract was obtained; the pressure of the second-stage separator was 10 MPa, and the temperature was 25° C. to obtain dark yellow slightly turbid lavender crude oil with a yield of 6.4%. Crude lavender oil enters the molecular distiller at a flow rate of 10mL / min, the feed temperature is 32°C, the distillation pressure is 390Pa, the distillation temperature is 50°C, the speed of the scraping film is 280r / min, and the cooling temperature is 35°C to obtain clear, transparent and lustrous Light and pure aroma, the yield is 17.3%.

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PUM

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Abstract

The invention provides a method for extracting lavender essential oil. The method comprises two processes: supercritical extraction and molecular distillation. The method comprises the following steps: extracting to obtain crude lavender oil by using supercritical extraction and rectification, and further purifying the crude lavender oil by utilizing the molecular distillation technology to obtain the lavender essential oil. The lavender essential oil obtained by the method is clear, transparent, light in color and pure in aroma, and the yield is 15-25 percent.

Description

technical field [0001] The invention belongs to a spice extraction method, in particular to a method for extracting lavender essential oil by using supercritical extraction and molecular distillation techniques. Background technique [0002] Lavender( Lavandula angustifolia Mill ) Department of Labiatae ( Labiatae ) Lavender ( Lavandula Linn ) plants, perennial herbs or semi-shrubs, known as "after aromatic grass". Native to the coast of the Mediterranean Sea and the islands of Oceania. It is distributed in China, Russia, Australia, the United States and South America, and has a long history of cultivation and application. my country introduced lavender as early as 1952, mainly distributed in Xinjiang, Shaanxi, Jiangsu and other places. Lavender leaves, stems, and flowers all have aroma, especially the aroma of flowers is rich and soft, non-irritating, and non-toxic and side effects. Therefore, it is widely used in medicine, aromatherapy, cosmetics, washing, and food ...

Claims

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Application Information

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IPC IPC(8): C11B9/02
Inventor 胡云福
Owner AGATE PERFUME MINGGUANG
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