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Method for extracting natural rose essential oil from rose

A technology for rose essential oil and rose flower, which is applied in the directions of essential oil/spice, fat generation, etc., can solve the problems of waste, low-level repetition of products, and untimely processing of rose flowers, and achieves the effect of avoiding high temperature process and having a sweet aroma.

Inactive Publication Date: 2009-07-08
庆阳市康惠玫瑰发展有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Damascus roses are widely cultivated in my country, from Shandong in the east, Xinjiang in the west, Guangdong in the south, Inner Mongolia and Shanxi in the north, and a large number of roses are produced every year. A considerable number of roses are wasted due to untimely processing, and the processed products are mostly primary products, which can only be used for some low-end products, such as: food, etc.
As a result, the added value of the product is not high, the product is low-level repetitive, and the development of high-end products is difficult, which affects the promotion and cultivation of roses, a commercial crop.
[0003] At present, rose essential oil mainly adopts the method of small-scale production distillation, which is one of the traditional and effective methods, but the biggest disadvantage is that the smell of rose essential oil obtained is not pure enough. There are small, hard to avoid, which affects the development of high-end products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Pretreatment: salt the rose flowers picked on the day with 10% salt for 3 days.

[0017] Take 1kg of pretreated roses, put them into 10kg of Titian petroleum ether at 35°C-55°C, continuously and repeatedly leaching within 1-2 hours, put the leachate into a distiller, and distill off the petroleum ether , to obtain about 50g of extract.

[0018] Dissolve the extract with 3 times the weight of 70% ethanol, put it in a refrigerator at -20°C and cool overnight, filter off the residue to obtain an alcohol extract, then put it in a vacuum distiller, and keep it in a vacuum of 0.090 Concentrate at ~0.095MPa to remove ethanol to obtain rose essential oil.

[0019] The index of this example gained rose essential oil is:

[0020] Appearance: Liquid

[0021] Color: pale yellow

[0022] Aroma: characteristic rose fragrance

[0023] Relative density 20 / 20℃: 0.858

[0024] Refractive index 20°C: 1.4588

[0025] Optical rotation at 20°C: -2.9°

[0026] Freezing point (℃): 20 ...

Embodiment 2

[0030] Pretreatment: salt the rose flowers on the day of picking with 10% salt for 5 days.

[0031] Take 1 kg of pretreated roses, put them into 15 kg of Titian petroleum ether at 35 ° C ~ 55 ° C, continuously and repeatedly leaching within 1-2 hours, put the leaching solution into a distiller, and evaporate the oil ether to obtain about 50g of extract.

[0032] Dissolve the extract with 5 times of 70% ethanol by weight, put it into a refrigerator at -10°C and cool overnight, filter off the residue to obtain an alcohol extract, then put it into a vacuum distiller at a vacuum of 0.090- Concentrate at 0.095MPa, remove ethanol, and obtain rose essential oil.

[0033] The index of this example gained rose essential oil is:

[0034] Appearance: liquid

[0035] Color: light yellow

[0036] Aroma: characteristic rose fragrance

[0037] Relative density 20 / 20℃: 0.857

[0038] Refractive index 20°C: 1.4572

[0039] Optical rotation at 20°C: -2.4°

[0040] Freezing point (℃): 19...

Embodiment 3

[0044] Pretreatment: salt the rose flowers picked on the day with 10% salt for 3 days.

[0045] Take 1 kg of pretreated roses, put them into 20 kg of Titian petroleum ether at 35 ° C ~ 55 ° C, continuously and repeatedly leaching within 1-2 hours, put the leachate into a distiller, and distill off the petroleum ether , to obtain about 50g of extract.

[0046] Dissolve the extract with 5 times by weight of 85% ethanol, put it into a refrigerator at -15°C and cool overnight, filter off the residue to obtain an alcohol extract, and then put it into a vacuum distiller at a vacuum of 0.090- Concentrate at 0.095MPa, remove ethanol, and obtain rose essential oil.

[0047] The index of this example gained rose essential oil is:

[0048] Appearance: liquid

[0049] Color: light yellow

[0050] Aroma: characteristic rose fragrance

[0051] Relative density 20 / 20℃: 0.859

[0052] Refractive index 20°C: 1.4592

[0053] Optical rotation at 20°C: -1.9°

[0054] Freezing point (℃): 2...

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Abstract

The invention relates to a method for extracting natural rose essential oil from fresh rose, which comprises: pretreating the rose, placing the pretreated rose into flavor-extracting petroleum ether, performing repeated leaching and filtration, removing residue, and obtaining leachate; distilling the flavor-extracting petroleum ether in the leachate, and obtaining an extract; adding the extract into ethanol for dissolution, freezing and filtration, removing undissolved substances, and obtaining an alcohol extract; and concentrating the alcohol extract under vacuum, removing the ethanol, and obtaining the rose essential oil. The essential oil extracted by the method maintains the special flavor of the rose; the method has rich resources of raw materials, fully utilizes the prior resources, and has simple technique and low cost; and the obtained product has unique flavor and long flavor lasting time, and is an ideal additive of food, cosmetics and the like.

Description

technical field [0001] The invention relates to a method for extracting natural rose essential oil from rose flowers. Background technique [0002] The quality and application of rose essential oil depends on the variety of rose. Rosa Damascene Mill is one of the best raw materials for producing rose essential oil because of its uniform and coordinated aroma substances, pure and long-lasting aroma. Damascus roses are widely cultivated in my country, from Shandong in the east, Xinjiang in the west, Guangdong in the south, Inner Mongolia and Shanxi in the north, and a large number of roses are produced every year. A considerable number of roses are wasted due to untimely processing, and most of the processed products are primary products, which can only be used for some low-end products, such as food. As a result, the added value of the product is not high, the product is low-level repetitive, and the development of high-end products is difficult, which affects the promotion a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11B9/02
Inventor 翟文俊岳红
Owner 庆阳市康惠玫瑰发展有限责任公司
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