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Method for extracting thyme oil

A technology of thyme oil and thyme, which is applied in the direction of essential oil/fragrance, fat production, etc., can solve the problems of incomplete extraction of essential oil, high extraction cost, and easy loss, so as to reduce the loss of essential oil, facilitate subsequent extraction, and have effective aroma reserved effect

Inactive Publication Date: 2019-01-11
TIANJIN NAER BIOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Supercritical carbon dioxide is used for extraction, the extraction cost is relatively high, and the carrier is a mixture of ethanol, acetone and ether, and the final essential oil is an extract-like product, which is prone to loss during the separation process from the slag
[0005] Utilize an organic solvent to extract to obtain an extraction mixture, and volatilize the organic solvent from the extraction mixture, filter the volatilized extraction mixture through an organic filter membrane to obtain thyme oil, and the method is to use an organic solvent as Ethanol, n-hexane or 3-chloromethane cannot completely extract the essential oil, and the extraction rate is relatively low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method for extracting thyme oil, comprising the steps of:

[0026] (i) Nutmeg powder preparation

[0027] Wash the fresh whole plant of thyme with a water content of 8%, and dry it in the dark; add the dried whole plant of thyme to a stirring ball mill, grind it at a speed of 300r / min, and sieve it to obtain 20 mesh thyme powder ;

[0028] (ii) Thyme powder low-temperature pulverization treatment

[0029] The thyme powder obtained in step (i) is placed in a temperature-controlled crushing tank, the temperature is lowered to -50°C, and the temperature is raised to room temperature at a constant speed of 20°C / min, and further crushed while heating;

[0030] (ⅲ) Thyme powder extraction

[0031] Thyme powder is placed in an extraction kettle for extraction, the liquid level of the extractant is completely submerged in the thyme powder, the extraction temperature is 50°C, the extraction pressure is 1.0 MPa, and the extraction time is 10 hours;

[0032] The extractant i...

Embodiment 2

[0038] A method for extracting thyme oil, comprising the steps of:

[0039] (i) Nutmeg powder preparation

[0040] Wash the fresh whole plant of thyme with a water content of 10%, and dry it in the dark; add the dried whole plant of thyme to a stirring ball mill, grind it at a speed of 500r / min, and sieve it to obtain a 60-mesh thyme powder ;

[0041] (ii) Thyme powder low-temperature pulverization treatment

[0042] The thyme powder obtained in step (i) is placed in a temperature-controlled crushing tank, the temperature is lowered to -90°C, and the temperature is raised to room temperature at a constant speed of 20°C / min, and further crushed while heating;

[0043] (ⅲ) Thyme powder extraction

[0044] Thyme powder is placed in an extraction kettle for extraction, the liquid level of the extractant is completely submerged in the thyme powder, the extraction temperature is 70°C, the extraction pressure is 1.5 MPa, and the extraction time is 15 hours;

[0045] The extractan...

Embodiment 3

[0051] A method for extracting thyme oil, comprising the steps of:

[0052] (i) Nutmeg powder preparation

[0053] Wash the fresh whole plant of thyme with a water content of 9%, and dry it in the dark; add the dried whole plant of thyme to a stirring ball mill, grind it at a speed of 400r / min, and sieve it to obtain a 40-mesh thyme powder ;

[0054] (ii) Thyme powder low-temperature pulverization treatment

[0055] The thyme powder obtained in step (i) is placed in a temperature-controlled crushing tank, the temperature is lowered to -70°C, and the temperature is raised to room temperature at a constant speed of 20°C / min, and further crushed while heating;

[0056] (ⅲ) Thyme powder extraction

[0057] Thyme powder is placed in an extraction kettle for extraction, the liquid level of the extractant is completely submerged in the thyme powder, the extraction temperature is 60°C, the extraction pressure is 1.2MPa, and the extraction time is 12h;

[0058] The extractant is fo...

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Abstract

The invention provides a method for extracting thyme oil. The method comprises the following steps: (i) preparation of nutmeg powder; (ii) low temperature pulverization of thyme powder; (iii) thyme powder extraction; (iv) product separation; and (v) residue collection. The invention provides the method for extracting thyme oil, which can greatly minimize the loss of essential oil by optimizing thepulverization process and the extraction process, the extraction process is simple, and the finally prepared thyme oil is a mixture of a thyme extract and soybean oil, which is brown oily liquid withhigh extraction rate, the thyme oil has high purity, and effective retention of aroma can be realized. Low-temperature pulverization is used to reduce the loss of essential oil; the cell wall is damaged by temperature changes, and the wall-breaking effect is achieved, which facilitates subsequent extraction.

Description

technical field [0001] The invention belongs to a method for extracting natural vegetable oil, in particular to a method for extracting thyme oil. Background technique [0002] Thyme is a genus of Lamiaceae, including about 350 species of perennial aromatic herbs, reaching a height of about 40 cm, and growing in Europe, North Africa and Asia. It is usually an evergreen plant with narrow stems. It has medicinal value, can be used to repel mosquitoes, and is lukewarm. Expelling wind and relieving exterior syndrome, promoting qi circulation to relieve pain, relieving cough, lowering blood pressure. For colds, coughs, headaches, toothaches, indigestion, acute gastroenteritis, hypertension. [0003] Thyme is widely distributed and mainly grows in mountains, river banks or beaches, and has high edible and medicinal application values. And thyme has a rich fragrance, which can be used as a natural condiment; in addition, the essential oil contained in it has strong antioxidant ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B9/02
CPCC11B9/02C11B9/025
Inventor 孙静张荣飞李汝娟
Owner TIANJIN NAER BIOTECH
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