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Method for extracting citronella hydrolat

A technology of pure dew and citronella, which is applied in the field of extraction of active ingredients of natural plants, can solve problems such as insufficient aroma, loss of color of the head fragrance, and influence on the aroma of the pure dew, and achieve the effect of pure aroma, improved purity, and obvious dehydration effect

Pending Publication Date: 2022-01-11
海南黎草纪新生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its low-concentration characteristics are easily absorbed by the skin, completely free of fragrance and alcohol, mild and non-irritating, can be used every day, and can also replace pure water to prepare various facial masks; After chemical action, the plant active ingredients are easily destroyed, and its efficacy will also be lost; among them, in the process of extracting citronella pure dew, because the solubility of citronella essential oil in water is extremely small, in the process of preparing citronella hydrosol by steam distillation, A part of essential oil components and a small part of small molecule water-soluble substances will enter the water layer hydrosol, resulting in low purity of the extracted hydrosol; High, affecting the aroma of pure dew, making it smell sour and astringent, affecting the sense of use, serious loss of top aroma and heavy color, high impurity content in oil, and insufficient aroma

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A method for extracting citronella hydrosol: comprising the following steps:

[0027] S1. Pretreatment: select the whole aerial part of lemongrass that has been sunny for more than 3 days, take the leaves of lemongrass, wash and cut into sections, heat and soak in a softener, the softener is chlorine with a volume ratio of 2:1:2 Sodium chloride, lithium acetate, sodium lignosulfonate, heated and soaked at 60°C, soaked for 1 hour, and taken out;

[0028] S2. Low-pressure steam distillation: add the treated citronella leaves to water, the mass volume ratio of citronella leaves to water g / mL is 5:1, and carry out low-pressure steam distillation, set the pressure to 0.03MPa, and the temperature to 100°C , distilled for 2h, collected the upper oil, and took the oil-water mixture under the precipitation;

[0029] S3. Mixed steam: Put the oil-water mixture distilled by the above S2 into the distillation tank, and feed steam with a flow rate of 0.5m 3 / h, the temperature is 1...

Embodiment 2

[0033] A method for extracting citronella hydrosol: comprising the following steps:

[0034] S1. Pretreatment: select the whole aerial part of lemongrass that has been sunny for more than 3 days, take the leaves of lemongrass, wash and cut into sections, heat and soak in a softener, the softener is chlorine with a volume ratio of 7:3:2 Sodium chloride, lithium acetate, sodium lignosulfonate, heated and soaked at 80°C, soaked for 3 hours, and taken out;

[0035] S2. Low-pressure steam distillation: add the treated lemongrass leaves to water, the mass volume ratio of lemongrass leaves to water g / mL is 5:3, and perform low-pressure steam distillation, set the pressure to 0.09MPa, and the temperature to 120°C , distilled for 5h, collected the upper oil, and took the oil-water mixture under the precipitation;

[0036] S3. Mixed steam: Put the oil-water mixture distilled by the above S2 into the distillation tank, and feed steam with the amount of 1.5m 3 / h, temperature is 150 ℃, ...

Embodiment 3

[0040] A method for extracting citronella hydrosol: comprising the following steps:

[0041] S1. Pretreatment: select the whole aerial part of lemongrass that has been sunny for more than 3 days, take the leaves of lemongrass, wash and cut into sections, heat and soak in a softener, the softener is chlorine with a volume ratio of 5:2:2 Sodium chloride, lithium acetate, sodium lignosulfonate, heating and soaking temperature is 70°C, soaking time 2h, take out;

[0042] S2. Low-pressure steam distillation: add the treated citronella leaves to water, the mass volume ratio of citronella leaves to water g / mL is 5:2, and carry out low-pressure steam distillation, set the pressure to 0.07MPa, and the temperature to 110°C , distilled for 3h, collected the upper layer oil, and took the oil-water mixture under the precipitation;

[0043] S3. Mixed steam: Put the oil-water mixture distilled by the above S2 into the distillation tank, and feed steam with the amount of 1m 3 / h, the temper...

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Abstract

The invention provides a method for extracting citronella hydrolat, and the method comprises the following preparation methods: S1, pretreatment, S2, low-pressure steam distillation, S3, steam mixing, S4, condensation, and S5, oil-water separation. The method has the advantages that the extracted hydrolat is high in purity, high in volatile main component content and pure in fragrance, has citronella fragrance, the hydrolat concentration reaches 99.2%, the volatile main components comprise more than 20% of citronellol, more than 25% of citronellal, more than 3% of citronellal and more than 25% of geranial.

Description

technical field [0001] The invention relates to the technical field of natural plant active ingredient extraction, in particular to a method for extracting citronella hydrosol. Background technique [0002] Citronella is a perennial herb widely distributed in Asia, Africa and America. Suitable for growing in tropical, subtropical, plateau grasslands and arid regions. Most of the citronella plants have the characteristics of strong regeneration, many tillers, fast growth, small investment, quick results and easy development and planting. There are more than 140 species of citronella plants in the world. There are 8 species of citronella plants in my country, namely Java citronella, lemongrass, rue grass, tall stalk citronella (withered grass), red stalk grass (Lusha citronella), twisted sheath citronella (wild citronella), Lemongrass and Maplegrass are mainly distributed in Yunnan, Sichuan, Guizhou, Guangdong, Guangxi, Hainan, Fujian and other places, and are important grass...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B9/02
CPCC11B9/027C11B9/02C11B9/022
Inventor 李艳李梓源章文浩孙学华范冠宝
Owner 海南黎草纪新生物科技有限公司
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