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Citronella oil extraction method

A technology of citronella oil and citronella, which is applied in the direction of essential oil/fragrance, fat production, etc. It can solve the problems of accelerating plant cell rupture, easily destroying heat-sensitive substances, and losing aroma of products, and achieves short extraction time and simple and easy process The effect of running, saving energy and auxiliary materials

Inactive Publication Date: 2019-08-09
南宁辰康生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Citronella essential oil can be extracted by steam distillation, which is cheap in equipment, easy to operate, large in output, and has been applied industrially, but high temperature easily destroys heat-sensitive substances and causes partial aroma loss
Microwave-assisted steam distillation method accelerates plant cell rupture through microwave treatment. Compared with traditional steam distillation process, the whole extraction process shortens half the time, and the extraction rate is higher, but the product still loses part of its aroma and has a cooking smell.
Supercritical carbon dioxide extraction method], this method has opened up a low-temperature extraction path, and the aroma quality of the product is good, but the solvent selectivity is low, the equipment cost is high, and the investment cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1 A kind of method that citronella oil extracts, comprises the steps:

[0029] 1) Cut the dried lemongrass stems and leaves (naturally sun-dried or dried) into short pieces;

[0030] 2) The cut citronella stems and leaves are pressed into pieces, put into filter bags, and fed into the subcritical equipment extraction kettle;

[0031] 3) Pour into subcritical fluid (may contain entrainer);

[0032] 4) Control the pressure and temperature for static extraction and decompression separation to obtain citronella extract;

[0033] 5) Repeat step 3) and step 4) once or several times, combine the extracts, drain, let stand for stratification, and the upper oil layer is the finished product of citronella oil.

[0034] Further, the stems and leaves of citronella are citronella species such as citral type and Java type.

[0035] Further, the cut short pieces are 1-3 cm long.

[0036] Further, the tableting process is to press into a round cake (with a diameter small...

Embodiment 2

[0041] 2kg of citronella stems and leaves were cut into flakes, and fed after tableting treatment, the ratio of solid to liquid was 1:1.5 (kg / L); butane was used as the extraction agent, 0.4MPa, 40°C static extraction for 30min once. After evaporating the solvent in the separation kettle, the citronella extract was obtained, discharged, and left to stand for 30 minutes to obtain 46.06 grams of the upper layer essential oil, and the yield of the essential oil was 2.30%.

Embodiment 3

[0043] 1.5kg of citronella stems and leaves were cut into flakes, and fed after tableting, the ratio of solid to liquid was 1:2 (kg / L); dimethyl ether was used as the extraction agent, 0.6MPa, 30°C static extraction for 30min once. After evaporating the solvent in the separation kettle, the citronella extract was obtained, discharged, and allowed to stand for 30 minutes to obtain 38.09 grams of essential oil in the upper layer, with a yield of 2.54%.

[0044] Compared with the traditional water vapor method, according to the Chinese Pharmacopoeia (2010 edition), the first appendix XD method for the determination of volatile oil, the essential oil is collected by the volatile oil detector, and the yield of essential oil is 2.28%.

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PUM

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Abstract

Belonging to the field of fine chemicals, the invention discloses a citronella oil extraction method. The method includes: cutting a dried citronella stem leaf product into short pieces; then performing tabletting on the cut citronella stem leaf, then putting the product into a filter bag, and conducting feeding into subcritical equipment extraction kettle; pouring a subcritical fluid into the extraction kettle; and controlling the pressure and temperature for static extraction and decompression separation to obtain a citronella extract. The method provided by the invention has the advantagesof short extraction time, high extraction rate, simple and feasible process, low extraction cost, excellent product quality, environmental friendliness, industrializability, etc.

Description

technical field [0001] The invention belongs to the field of fine chemical industry and relates to a method for extracting citronella oil. Background technique [0002] Citronella, Gramineae (Gramineae) Citronella (Cymbopogon) herb. Distributed in India, Sri Lanka, Malaysia, Java to Sumatra in Indonesia, and cultivated in Guangdong, Guangxi, Yunnan, Hainan Island, and Taiwan. Its stems and leaves are the raw materials for extracting essential oils. Javanese citronella essential oil has been successfully commercialized and has a wide range of uses. It is generally used in Southeast Asia to prevent mosquitoes and insects. At the same time, citronella essential oil has been proved to have antibacterial effects and is used in agriculture such as melon and fruit preservation. In the field, it is also used to isolate citronellal, geraniol, citronellol and other components for the preparation of advanced flavors or deep processing to prepare advanced fine chemicals. [0003] Citr...

Claims

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Application Information

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IPC IPC(8): C11B9/02
CPCC11B9/022C11B9/025
Inventor 邓倩李鸿山李华杰
Owner 南宁辰康生物科技有限公司
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