Combined extraction method for rosemary essential oil and rosemary antioxidant

A rosemary essential oil and anti-oxidant technology, which is applied in the directions of essential oils/fragrances, chemical instruments and methods, and fat production, can solve the problems of low extraction rate, expensive equipment, and small scale, and achieve short extraction cycle and low price. Inexpensive and easy to recycle

Inactive Publication Date: 2005-08-17
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

"Edible oil extraction method" is to crush rosemary leaves and extract them directly with edible oil at room temperature or under heating, but the speed of filtering and removing residue is slow, and the oil will have a strong rosemary essential oil odor, which is difficult Exhaustion: "Organic solvent extraction" is a kind of extraction method that was used earlier and is economical and applicable. According to the different types of solvents used, the extraction methods and steps are also different; "CO 2 "Supercritical extraction method" has good extraction effect and high product quality, but the scale is small, the equipment is expensive, high-pressure operation, and operating cost are high. Adding a small amount of organic solvent as entrainer or co-solvent to improve the extraction yield or selectivity actually loses the advantage of not using organic solvents; The obtained product has poor appearance, low yield when used alone, and the pH range of the extract must be strictly controlled; the "superheated water extraction method" is only a preliminary research report, and the method has not yet been formed. The extraction device is special and the scale is very small. Not yet valuable for application development
[0003] In the existing "organic solvent extraction method" close to the present invention, it includes extracting rosemary raw materials with ethanol or steamed residual leaves, removing the so

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A comprehensive extraction method of rosemary essential oil and rosemary antioxidant, which is characterized in that the rosemary is directly circulated and extracted at 20-100°C with a polar organic solvent equivalent to 3 to 20 times the weight of rosemary leaf material Germ leaf material 0.08~6h, obtain the solution of the rosemary essential oil and rosemary antioxidant that are dissolved in the polar organic solvent, use the mixture that is equivalent to rosemary essential oil and rosemary antioxidant 3~200 times weight Polar or weakly polar organic solvents are directly circulated to extract rosemary essential oil and rosemary antioxidants at 20-100°C for 0.08-6h and cooled to 5-30°C to obtain solutions dissolved in non-polar or weakly polar organic solvents The rosemary essential oil and the precipitated rosemary antioxidant are filtered to obtain the precipitate rosemary antioxidant, and the extract is evaporated at 20-100 DEG C to remove the solvent to obtain the...

Embodiment 2

[0041] A comprehensive extraction method of rosemary essential oil and rosemary antioxidant, comprising the following two steps:

[0042] The first step: mix the rosemary leaf material with a polar organic solvent equivalent to 3 to 20 times the weight of rosemary leaf material in a circulating extraction equipment, and directly circulate and extract at 20-100 ° C for 0.08-6 hours, and the rosemary Leaf residue is left in the extractor, and the extract solution in the bottom receiver is evaporated to remove the solvent at 20-100° C. to obtain a mixture of rosemary essential oil and rosemary antioxidant;

[0043] Among them, the dry leaves of rosemary as raw material can be mature dry leaves or fresh leaves dried naturally, and the water content is all ≤ 10%. Non-toxic organic solvents can be alcohols (such as methanol, ethanol, propanol, butanol and other solvents, or their aqueous mixtures), ketones (acetone, methyl ethyl ketone, cyclohexanone and other solvents), esters (met...

Embodiment 3

[0047]A comprehensive extraction method of rosemary essential oil and rosemary antioxidants. First, at 20-100°C, use a mixed organic solvent of polar organic solvents and non-polar or weakly polar organic solvents to directly extract rosemary Geranium leaf material 0.08~6h, wherein the total weight of the mixed organic solvent of non-polar or weak polar organic solvent and polar organic solvent is 3~20 times of rosemary leaf material weight, the weight of polar organic solvent accounts for non-polar organic solvent The percentage of the total weight of the polar or weakly polar organic solvent and the polar organic solvent is 0.1 to 20%, and after circulating extraction, it is cooled to 5 to 30°C to obtain an extract containing light-colored insoluble solid rosemary antioxidants, Filtration, the obtained solid is a rosemary antioxidant product, and the filtrate is evaporated to remove the solvent at 20-100° C. to obtain a rosemary essential oil product,

[0048] Among them, th...

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PUM

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Abstract

The comprehensive process of extracting refined rosemary oil and rosemary antioxidant includes the following steps: circularly extracting rosemary leaf directly with polar organic solvent in 3-20 times rosemary leaf at 20-100 deg.c for 0.08-6 hr to obtain refined rosemary oil and rosemary antioxidant dissolved in the polar organic solvent; circularly extracting the mixture of refined rosemary oil and rosemary antioxidant directly with non-polar organic solvent or weak polar organic solvent in 3-200 times the mixture at 20-100 deg.c for 0.08-6 hr and cooling to 5-30 deg.c to obtain refined rosemary oil dissolved in the non-polar organic solvent or weak polar organic solvent and rosemary antioxidant deposit; filtering to obtain rosemary antioxidant; and distilling the extracted liquid at 20-100 deg.c to eliminate solvent and obtain refined rosemary oil. The said process has short extraction period, high efficiency and low cost.

Description

technical field [0001] The present invention relates to a kind of extracting method of rosemary essential oil and rosemary anti-oxidant, particularly relate to a kind of extracting by polar organic solvent, non-polar or weak polar organic solvent or its mixed solvent circulation extraction of rosemary dry leaf, If necessary, it is assisted by ultrasonic strengthening treatment, and the comprehensive extraction method of rosemary essential oil and rosemary antioxidant can be obtained simultaneously or successively. Background technique [0002] The extraction method of rosemary essential oil mainly uses the traditional steam distillation method, and recently also uses CO 2 Supercritical extraction method. The extraction methods of rosemary antioxidants include: "edible oil extraction method", "organic solvent extraction method", "CO 2 "Supercritical extraction method", "alkaline water extraction method" and "superheated water extraction metho...

Claims

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Application Information

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IPC IPC(8): C09K19/34C11B9/00
Inventor 毕良武赵振东刘先章李冬梅王婧古研
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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