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A kind of extraction method of citrus essential oil

An extraction method and technology of citrus essential oil, which is applied in the direction of essential oil/fragrance, fat production, etc., can solve the problems of high pressure in supercritical extraction operation, lower quality of essential oil, difficulty in large-scale production, etc., achieve excellent miscibility and increase extraction rate , short time effect

Active Publication Date: 2017-04-19
HUNAN AGRI PRODS PROCESSING INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Vacuum distillation and molecular distillation are carried out at high temperature, which decomposes the heat-sensitive aroma components in the essential oil and reduces the quality of the essential oil; the efficiency of the continuous countercurrent method to remove terpenes is low, and the aldehydes that contribute greatly to the aroma of citrus essential oils are also removed. It affects the quality of the essential oil; the operation pressure of supercritical extraction is high, the equipment requirements are high, the cost is high, and it is difficult to produce on a large scale; the common method for extracting citrus deterpenoid essential oil in general production is the organic solvent extraction method, and the essential oil obtained by this method High yield, good deterpenification effect, less pigment, the disadvantage is that the solvent residue of essential oil is high, the extraction time is long, the operation is complicated, and the efficiency is low

Method used

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  • A kind of extraction method of citrus essential oil

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Experimental program
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Effect test

Embodiment 1

[0032] see figure 1 , a method for extracting citrus essential oil of the present invention, specifically comprising the steps of:

[0033] (1) Take 200 g of dried citrus peel, and use an ultrafine pulverizer to ultrafinely pulverize it at -10°C for 5 minutes to obtain a powder with a particle size of 2 mm.

[0034] (2) Place the powder of step (1) in the batching tank, add extractant by 1g: 15mL (extractant is a mixed solution of ethane and dimethyl ether, wherein the volume ratio of ethane and dimethyl ether is 8: 1 ), while slowly stirring, use a probe-type ultrasonic extractor to perform ultrasonic extraction for 15 minutes under the condition of a current intensity of 1.2A / 45w to obtain an ultrasonic extract.

[0035] (3) Place the ultrasonic extract in step (2) in a high-voltage pulsed electric field, set the electric field strength to 25KV / cm, pulse time to 500μs, pulse frequency to 240Hz, and extract for 20min to obtain a high-voltage pulsed extract.

[0036] (4) Tak...

Embodiment 2

[0041] see figure 1 , a kind of extracting method of citrus essential oil of the present invention, comprises the steps:

[0042] (1) Take 200 g of dried citrus peel, and use an ultrafine pulverizer to ultrafinely pulverize it at -10°C for 5 minutes to obtain a powder with a particle size of 2 mm.

[0043] (2) Place the powder of step (1) in the batching tank, add extractant by 1g:10mL (extractant is a mixed solution of ethane and dimethyl ether, wherein the volume ratio of ethane and dimethyl ether is 8:1 ), while slowly stirring, use a probe-type ultrasonic extractor to perform ultrasonic extraction for 10 minutes under the condition of current intensity 1A / 25w to obtain an ultrasonic extract.

[0044](3) Place the ultrasonic extract in step (2) in a high-voltage pulsed electric field, set the electric field strength to 25KV / cm, pulse time to 500μs, pulse frequency to 240Hz, and extraction time to 20min to obtain a high-voltage pulsed extract.

[0045] (4) Take 3L of the h...

Embodiment 3

[0050] see figure 1 , a kind of extracting method of citrus essential oil of the present invention, comprises the steps:

[0051] (1) Take 200 g of dried citrus peel, and use an ultrafine pulverizer to ultrafinely pulverize it at -10°C for 5 minutes to obtain a powder with a particle size of 2 mm.

[0052] (2) Place the powder of step (1) in the 5L leaching tank of the subcritical extraction complete set of equipment, add the extractant by 1g: 10mL (the extractant is a mixed solution of ethane and dimethyl ether, wherein ethane and dimethyl ether Ether volume ratio is 8:1), infiltrated for 3 hours; then subcritical solvent extraction was carried out under the conditions of extraction pressure of 15Mpa, extraction temperature of 40°C and extraction of 30min to obtain mixed oil and citrus powder.

[0053] (3) Take the mixed oil in step (2) and import it into the desolventization tank, reduce the pressure to -0.08MPa to carry out decompression separation in the desolventization ...

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Abstract

The invention relates to the technical field of bioseparation and particularly discloses an extracting method of citrus essential oil. The method comprises the following steps that citrus peels are dried in the shade and smashed into powder, an extracting agent composed of dimethyl ether and ethane is added, and the mixture is extracted ultrasonically; the feed liquid mixture subjected to ultrasonic treatment is placed into a high-voltage pulse electric field to be extracted; the feed liquid mixture subjected to treatment in the high-voltage pulse electric field is subjected to subcritical extraction with organic solvent and water as extracting agents, and the extracting agents are removed, so that the citrus terpene removal essential oil is obtained. According to the extracting method of the citrus essential oil, in the extracting process, the required temperature and pressure are low, it can be ensured that aroma components in the essential oil are not damaged while the good terpene substance removal effect is achieved, the essential oil extracting yield is high, the technology is simple, and the equipment cost is low; the extract liquor obtained after subcritical solvent extraction has recycling value and can be widely used for preparing limonene.

Description

technical field [0001] The invention relates to the technical field of biological separation, in particular to a method for extracting citrus essential oil. Background technique [0002] Citrus essential oil exists in citrus peel or citrus secretory gland, and is an important by-product of citrus processing. It has a natural, fresh and pleasant aroma of citrus, and is widely used in the production of food, flavoring, medicine, cosmetics and beverages. Its main components are terpene compounds, which account for more than 90% of the total amount of citrus essential oils. Among them, limonene has the most content and can be used as cosmetics, soaps and daily chemical essences, but its contribution to citrus aroma is small, and It is easy to oxidize and deteriorate and reduce the quality of essential oil; the content of aldehydes, alcohols, lipids and ketones is less than 5%, but it is the main source of aroma of citrus essential oil. In production, organic solvent extraction,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C11B9/02
CPCC11B9/022C11B9/025
Inventor 单杨梁曾恩妮付复华谢秋涛潘兆平尚雪波苏东林
Owner HUNAN AGRI PRODS PROCESSING INST
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