CN113403147A - Snow rhododendron essential oil and extraction method and application thereof - Google Patents
Snow rhododendron essential oil and extraction method and application thereof Download PDFInfo
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- 239000000341 volatile oil Substances 0.000 title claims abstract description 107
- 238000000605 extraction Methods 0.000 title claims description 45
- 241000245165 Rhododendron ponticum Species 0.000 title 1
- 241000208422 Rhododendron Species 0.000 claims abstract description 75
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 52
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- 230000032683 aging Effects 0.000 claims abstract description 12
- 238000002156 mixing Methods 0.000 claims abstract description 12
- 238000001035 drying Methods 0.000 claims abstract description 11
- 238000000199 molecular distillation Methods 0.000 claims abstract description 11
- 238000007789 sealing Methods 0.000 claims abstract description 9
- 239000002994 raw material Substances 0.000 claims abstract description 8
- 239000002304 perfume Substances 0.000 claims abstract description 6
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- 238000000926 separation method Methods 0.000 claims description 35
- 241000196324 Embryophyta Species 0.000 claims description 16
- 238000003756 stirring Methods 0.000 claims description 16
- 238000009835 boiling Methods 0.000 claims description 11
- 238000010992 reflux Methods 0.000 claims description 9
- 238000004140 cleaning Methods 0.000 claims description 4
- 239000002537 cosmetic Substances 0.000 claims description 4
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical group [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 3
- 150000003839 salts Chemical class 0.000 claims description 3
- 230000007613 environmental effect Effects 0.000 claims description 2
- 239000003205 fragrance Substances 0.000 abstract description 11
- 238000000034 method Methods 0.000 abstract description 7
- 239000000126 substance Substances 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 7
- 239000000047 product Substances 0.000 description 7
- XMGQYMWWDOXHJM-UHFFFAOYSA-N limonene Chemical compound CC(=C)C1CCC(C)=CC1 XMGQYMWWDOXHJM-UHFFFAOYSA-N 0.000 description 4
- DTGKSKDOIYIVQL-WEDXCCLWSA-N (+)-borneol Chemical compound C1C[C@@]2(C)[C@@H](O)C[C@@H]1C2(C)C DTGKSKDOIYIVQL-WEDXCCLWSA-N 0.000 description 3
- REPVLJRCJUVQFA-UHFFFAOYSA-N (-)-isopinocampheol Natural products C1C(O)C(C)C2C(C)(C)C1C2 REPVLJRCJUVQFA-UHFFFAOYSA-N 0.000 description 3
- KGEKLUUHTZCSIP-HOSYDEDBSA-N [(1s,4s,6r)-1,7,7-trimethyl-6-bicyclo[2.2.1]heptanyl] acetate Chemical compound C1C[C@]2(C)[C@H](OC(=O)C)C[C@H]1C2(C)C KGEKLUUHTZCSIP-HOSYDEDBSA-N 0.000 description 3
- 229940116229 borneol Drugs 0.000 description 3
- CKDOCTFBFTVPSN-UHFFFAOYSA-N borneol Natural products C1CC2(C)C(C)CC1C2(C)C CKDOCTFBFTVPSN-UHFFFAOYSA-N 0.000 description 3
- DTGKSKDOIYIVQL-UHFFFAOYSA-N dl-isoborneol Natural products C1CC2(C)C(O)CC1C2(C)C DTGKSKDOIYIVQL-UHFFFAOYSA-N 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
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- 235000006679 Mentha X verticillata Nutrition 0.000 description 2
- 235000002899 Mentha suaveolens Nutrition 0.000 description 2
- 235000001636 Mentha x rotundifolia Nutrition 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
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- 230000018109 developmental process Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 229940087305 limonene Drugs 0.000 description 2
- 235000001510 limonene Nutrition 0.000 description 2
- 238000007086 side reaction Methods 0.000 description 2
- 206010011224 Cough Diseases 0.000 description 1
- 241000208421 Ericaceae Species 0.000 description 1
- 206010062717 Increased upper airway secretion Diseases 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 230000003796 beauty Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229940115397 bornyl acetate Drugs 0.000 description 1
- 239000002775 capsule Substances 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 239000013065 commercial product Substances 0.000 description 1
- -1 daily necessities Substances 0.000 description 1
- 150000004179 delta-cadinene derivatives Chemical class 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 239000000796 flavoring agent Substances 0.000 description 1
- 235000019634 flavors Nutrition 0.000 description 1
- 238000010413 gardening Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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- 208000026435 phlegm Diseases 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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- 238000011160 research Methods 0.000 description 1
- USDOQCCMRDNVAH-UHFFFAOYSA-N sigma-cadinene Natural products C1C=C(C)CC2C(C(C)C)CC=C(C)C21 USDOQCCMRDNVAH-UHFFFAOYSA-N 0.000 description 1
- 230000017260 vegetative to reproductive phase transition of meristem Effects 0.000 description 1
- 238000003809 water extraction Methods 0.000 description 1
- USDOQCCMRDNVAH-KKUMJFAQSA-N β-cadinene Chemical compound C1C=C(C)C[C@H]2[C@H](C(C)C)CC=C(C)[C@@H]21 USDOQCCMRDNVAH-KKUMJFAQSA-N 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
- C11B9/00—Essential oils; Perfumes
- C11B9/02—Recovery or refining of essential oils from raw materials
- C11B9/027—Recovery of volatiles by distillation or stripping
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K8/00—Cosmetics or similar toiletry preparations
- A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
- A61K8/92—Oils, fats or waxes; Derivatives thereof, e.g. hydrogenation products thereof
- A61K8/922—Oils, fats or waxes; Derivatives thereof, e.g. hydrogenation products thereof of vegetable origin
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
- A61Q13/00—Formulations or additives for perfume preparations
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
- A61Q19/00—Preparations for care of the skin
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
- C11B9/00—Essential oils; Perfumes
- C11B9/02—Recovery or refining of essential oils from raw materials
- C11B9/022—Refining
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K2800/00—Properties of cosmetic compositions or active ingredients thereof or formulation aids used therein and process related aspects
- A61K2800/10—General cosmetic use
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- Health & Medical Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Animal Behavior & Ethology (AREA)
- Wood Science & Technology (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Birds (AREA)
- Epidemiology (AREA)
- Dermatology (AREA)
- Fats And Perfumes (AREA)
- Cosmetics (AREA)
Abstract
The invention discloses a method for extracting snow rhododendron essential oil, which comprises the following steps: (1) mixing and pulverizing branches and leaves of snow-layer rhododendron; (2) distilling and extracting in a water distillation device to obtain crude essential oil; (3) centrifuging the crude essential oil obtained in the step (2), taking the upper clear essential oil, adding a drying agent, and drying until the essential oil is clear and transparent; (4) sealing and aging the essential oil obtained in the step (3) for three days at normal temperature in a dark place; (5) and (3) separating and finely extracting the aged essential oil on molecular distillation equipment to obtain the snow rhododendron essential oil. The snow-layer rhododendron essential oil prepared by the invention has strong snow-layer rhododendron aroma and can provide a natural raw material with unique characteristics in storage areas for fragrance blending of perfume and daily chemical essence.
Description
Technical Field
The invention relates to the technical field of plant extraction and processing, in particular to snow rhododendron essential oil and an extraction method and application thereof.
Background
In recent years, with the improvement of the pursuit of green, health and environmental protection, the development of the green natural plants has been more and more valued by people. And the special geographical location and ecological environment of Tibet make it possess unique plant population because of being in the third pole of the world. Can be used in cold environment and in scarce material condition, and most research workers forget to do the work. In Tibet regions where natural plant resources are abundant and developed to a considerable extent, such sustainable green development is being demanded.
Snow-layer rhododendron is a evergreen shrub of rhododendron of Ericaceae, has many branches and is dense, and can be laid into a cushion shape; capsule round to oval, squashed; the flowering period is 5-8 months, and the fruit period is 8-9 months; distributed in southeast, south, east and northeast of the Tibet of China, and Nepal, India, Plumbum preparatium and Centanium are also distributed. The snow-layer rhododendron comes from mountain shrubs, glacier valley and meadows, the altitude is 3200-5800 meters, the snow-layer rhododendron has cultivation and gardening values due to the beauty of flowers, meanwhile, the tender branches and leaves of the snow-layer rhododendron can be used for relieving cough and eliminating phlegm, and the snow-layer rhododendron has special aromatic smell as a plant in a Tibetan region.
At present, the same type of products similar to the snow rhododendron essential oil are not available in the market.
Disclosure of Invention
The invention aims to provide an extraction method for extracting and preparing snow-layer rhododendron essential oil by utilizing rhododendron branches and leaves in the south Tibetan region, which is characterized in that the snow-layer rhododendron essential oil with better fragrance is obtained by evaluating and analyzing the fragrance of the snow-layer rhododendron essential oil and directionally carrying out refined extraction and impurity removal, so that a unique natural raw material with characteristics of the Tibetan region is provided for fragrance blending of perfume and daily chemical essence, and the problem that the blank of the characteristic rhododendron essential oil of the Tibetan region does not exist in the fragrance raw material market in the prior art is solved.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the invention provides a method for extracting snow rhododendron essential oil, which comprises the following steps:
(1) mixing and pulverizing branches and leaves of snow-layer rhododendron;
(2) distilling and extracting in a water distillation device to obtain crude essential oil;
(3) centrifuging the crude essential oil obtained in the step (2), taking the upper clear essential oil, adding a drying agent, and drying until the essential oil is clear and transparent;
(4) sealing and aging the essential oil obtained in the step (3) for three days at normal temperature in a dark place;
(5) and (3) separating and finely extracting the aged essential oil on molecular distillation equipment to obtain the snow rhododendron essential oil.
In some specific embodiments, the snow-layer azalea is a snow-layer azalea grown in Quilashan, Tibet or Milin county.
In some specific embodiments, in the step (1), the crushed mesh number is 200-400 mesh.
In some specific embodiments, in step (2), the distillation extraction process is water extraction in a water distillation device, and the water ratio is plant: 1 part of water: and 8, boiling and refluxing for 2h, and collecting refluxed crude essential oil.
In some specific embodiments, in step (3), the centrifugation is performed at a rate of 3000 to 10000rpm for 3 to 20 min.
In some specific embodiments, in step (3), the drying agent is anhydrous sodium sulfate or dried and dehydrated salt.
In some specific embodiments, in the step (4), the ambient temperature of the aging and standing is 8-35 ℃.
In some specific embodiments, in the step (5), the separation and fine extraction is a secondary separation, the temperature of the primary separation is 60-80 ℃, and the stirring speed is 180-220 r/min; the temperature of the secondary separation is 80-150 ℃, and the stirring speed is 180-250 r/min.
In a second aspect, the invention provides a rhododendron essential oil obtained by the above extraction method.
Preferably, the snow rhododendron essential oil comprises the following components in parts by mass:
in a third aspect, the invention also provides application of the snow rhododendron essential oil.
Specifically, a proper amount of the rhododendron essential oil can be used as a raw material to be added into household cleaning products, perfume, daily necessities and cosmetics, so that the products have special fragrance.
Compared with the prior art, the invention provides snow rhododendron essential oil and an extraction method and application thereof, and the snow rhododendron essential oil has the following beneficial effects:
the snow rhododendron essential oil extracted by the method is relatively appropriate in reduction of the fragrance of the plant snow rhododendron; because of using the water distillation extraction process, the plant is completely soaked in water and has higher temperature, the occurrence of unpredictable side reactions is inevitable, and other unpleasant miscellaneous gases are easy to generate, and the balance between the yield and the aroma quality is found as much as possible on the process parameter setting; by the process method, interference of side reaction on the quality of the snow rhododendron essential oil can be eliminated only by aging for a short time, and the aroma quality of the snow rhododendron essential oil can be used as an essence raw material component to be applied to products such as household cleaning products, perfumes, daily necessities, cosmetics and the like.
Detailed Description
The technical solutions of the present invention will be described clearly and completely by the detailed embodiments, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the following examples, the drying agent is anhydrous sodium sulfate or dried salt. The used water distillation equipment, centrifuge and separation distillation equipment are all commercial product equipment.
Example 1
The embodiment provides an extraction method of snow rhododendron essential oil, which comprises the following steps:
(1) taking twigs and leaves of snow-layer rhododendron growing in Tibet Quilashan, mixing and crushing to 100-200 meshes;
(2) adding water into a water distillation device for extraction, wherein the water adding proportion is that the plants: 1 part of water: boiling and refluxing for 2h, and collecting refluxed crude essential oil;
(3) centrifuging the crude essential oil obtained in the step (2) by using a centrifuge, wherein the speed of centrifugal separation is 6000rpm, the time is 10min, taking the upper clear essential oil, adding a drying agent, drying until the essential oil is clear and transparent, and completely removing water;
(4) sealing and aging the dehydrated essential oil obtained in the step (3) for three days at normal temperature in a dark place, wherein the normal temperature refers to the ambient temperature of 8-35 ℃;
(5) and (3) carrying out separation and fine extraction on the aged essential oil on molecular distillation equipment, wherein the temperature of the first-stage separation is 70 ℃, the stirring speed is 180r/min, the temperature of the second-stage separation is 120 ℃, and the stirring speed is 220r/min, so as to obtain the snow-layer rhododendron essential oil.
Example 2
The embodiment provides an extraction method of snow rhododendron essential oil, which comprises the following steps:
(1) taking twigs and leaves of snow-layer rhododendron growing in Milin county of Tibet, mixing and crushing to 100-200 meshes;
(2) adding water into a water distillation device for extraction, wherein the water adding proportion is that the plants: 1 part of water: boiling and refluxing for 2h, and collecting refluxed crude essential oil;
(3) centrifuging the crude essential oil obtained in the step (2) by using a centrifuge, wherein the speed of centrifugal separation is 6000rpm, the time is 10min, taking the upper clear essential oil, adding a drying agent, drying until the essential oil is clear and transparent, and completely removing water;
(4) sealing and aging the dehydrated essential oil obtained in the step (3) for three days at normal temperature in a dark place, wherein the normal temperature refers to the ambient temperature of 8-35 ℃;
(5) and (3) carrying out separation and fine extraction on the aged essential oil on molecular distillation equipment, wherein the temperature of the first-stage separation is 70 ℃, the stirring speed is 180r/min, the temperature of the second-stage separation is 120 ℃, and the stirring speed is 220r/min, so as to obtain the snow-layer rhododendron essential oil.
Example 3
The embodiment provides an extraction method of snow rhododendron essential oil, which comprises the following steps:
(1) taking twigs and leaves of snow-layer rhododendron growing in Tibet Quilashan, mixing and crushing to 100-200 meshes;
(2) adding water into a water distillation device for extraction, wherein the water adding proportion is that the plants: 1 part of water: boiling and refluxing for 5h, and collecting refluxed crude essential oil;
(3) centrifuging the crude essential oil obtained in the step (2) by using a centrifuge, wherein the speed of centrifugal separation is 6000rpm, the time is 10min, taking the upper clear essential oil, adding a drying agent, drying until the essential oil is clear and transparent, and completely removing water;
(4) and (4) carrying out separation and fine extraction on the essential oil obtained in the step (3) on molecular distillation equipment, wherein the temperature of the first-stage separation is 70 ℃, the stirring speed is 180r/min, the temperature of the second-stage separation is 120 ℃, and the stirring speed is 220r/min, so as to obtain the rhododendron hybridum essential oil.
Example 4
The embodiment provides an extraction method of snow rhododendron essential oil, which comprises the following steps:
(1) taking twigs and leaves of snow-layer rhododendron growing in Tibet Quilashan, mixing and crushing to 100-200 meshes;
(2) adding water into a water distillation device for extraction, wherein the water adding proportion is that the plants: 1 part of water: boiling and refluxing for 4h, and collecting refluxed crude essential oil;
(3) centrifuging the crude essential oil obtained in the step (2) by using a centrifuge, wherein the speed of centrifugal separation is 6000rpm, the time is 10min, taking the upper clear essential oil, adding a drying agent, drying until the essential oil is clear and transparent, and completely removing water;
(4) sealing and aging the dehydrated essential oil obtained in the step (3) for three days at normal temperature in a dark place, wherein the normal temperature refers to the ambient temperature of 8-35 ℃;
(5) and (3) carrying out separation and fine extraction on the aged essential oil on molecular distillation equipment, wherein the temperature of the first-stage separation is 70 ℃, the stirring speed is 180r/min, the temperature of the second-stage separation is 120 ℃, and the stirring speed is 220r/min, so as to obtain the snow-layer rhododendron essential oil.
Example 5
The embodiment provides an extraction method of snow rhododendron essential oil, which comprises the following steps:
(1) taking twigs and leaves of snow-layer rhododendron growing in Tibet Quilashan, mixing and crushing to 100-200 meshes;
(2) adding water into a water distillation device for extraction, wherein the water adding proportion is that the plants: 1 part of water: boiling and refluxing for 1h, and collecting refluxed crude essential oil;
(3) centrifuging the crude essential oil obtained in the step (2) by using a centrifuge, wherein the speed of centrifugal separation is 6000rpm, the time is 10min, taking the upper clear essential oil, adding a drying agent, drying until the essential oil is clear and transparent, and completely removing water;
(4) sealing and aging the dehydrated essential oil obtained in the step (3) for three days at normal temperature in a dark place, wherein the normal temperature refers to the ambient temperature of 8-35 ℃;
(5) and (3) carrying out separation and fine extraction on the aged essential oil on molecular distillation equipment, wherein the temperature of the first-stage separation is 70 ℃, the stirring speed is 180r/min, the temperature of the second-stage separation is 120 ℃, and the stirring speed is 220r/min, so as to obtain the snow-layer rhododendron essential oil.
Example 6
The embodiment provides an extraction method of snow rhododendron essential oil, which comprises the following steps:
(1) taking twigs and leaves of snow-layer rhododendron growing in Tibet Quilashan, mixing and crushing to 100-200 meshes;
(2) adding water into a water distillation device for extraction, wherein the water adding proportion is that the plants: 1 part of water: boiling and refluxing for 2h, and collecting refluxed crude essential oil;
(3) centrifuging the crude essential oil obtained in the step (2) by using a centrifuge, wherein the speed of centrifugal separation is 6000rpm, the time is 10min, taking the upper clear essential oil, adding a drying agent, drying until the essential oil is clear and transparent, and completely removing water;
(4) sealing and aging the dehydrated essential oil obtained in the step (3) for three days at normal temperature in a dark place, wherein the normal temperature refers to the ambient temperature of 8-35 ℃;
(5) and (3) carrying out separation and fine extraction on the aged essential oil on molecular distillation equipment, wherein the temperature of the first-stage separation is 60 ℃, the stirring speed is 180r/min, the temperature of the second-stage separation is 130 ℃, and the stirring speed is 220r/min, so as to obtain the snow-layer rhododendron essential oil.
Example 7
The embodiment provides an extraction method of snow rhododendron essential oil, which comprises the following steps:
(1) taking twigs and leaves of snow-layer rhododendron growing in Tibet Quilashan, mixing and crushing to 100-200 meshes;
(2) adding water into a water distillation device for extraction, wherein the water adding proportion is that the plants: 1 part of water: boiling and refluxing for 2h, and collecting refluxed crude essential oil;
(3) centrifuging the crude essential oil obtained in the step (2) by using a centrifuge, wherein the speed of centrifugal separation is 6000rpm, the time is 10min, taking the upper clear essential oil, adding a drying agent, drying until the essential oil is clear and transparent, and completely removing water;
(4) sealing and aging the dehydrated essential oil obtained in the step (3) for three days at normal temperature in a dark place, wherein the normal temperature refers to the ambient temperature of 8-35 ℃;
(5) distilling the aged essential oil under reduced pressure on molecular distillation equipment, heating at 70-120 deg.C in a gradient manner, and distilling at 10 deg.C for 15 min from 70 deg.C until the temperature is 120 deg.C to obtain the Rhododendron hybridum essential oil.
The snow rhododendron essential oil prepared in the above examples 1 to 7 was subjected to effective component detection and aroma evaluation. Wherein the main sources of specific aroma in the rhododendron essential oil comprise limonene (with fruity aroma), cadinene (radix aucklandiae), borneol and bornyl acetate (all of which can bring cool mint feeling).
Specifically, the evaluation results of the composition comparison of the snow rhododendron essential oil prepared in examples 1 to 7 are shown in the following table 1:
TABLE 1
| Examples | Limonene | Borneol acetate | Alpha-cadinenes | Delta-cadinenes | Borneol (borneol) |
| 1 | 0.307 | 1.008 | 5.550 | 20.098 | 0.101 |
| 2 | 0.725 | 0.913 | 3.919 | 17.433 | 0.143 |
| 3 | 0.305 | 1.157 | 3.831 | 25.053 | 0.109 |
| 4 | 0.058 | 0.395 | 6.402 | 23.503 | 0.030 |
| 5 | 0.262 | 1.038 | 5.789 | 19.624 | 0.088 |
| 6 | 0.253 | 0.993 | 5.809 | 19.935 | 0.012 |
| 7 | 0.054 | 0.653 | 8.758 | 13.384 | 0.114 |
Note: the data in table 1 are in percent.
The following table 2 is summarized in combination with the information on the yield, state, aroma and production area of examples 1 to 7:
TABLE 2
| Examples | Yield (%) | Status of state | Fragrance | Origin of raw materials |
| 1 | 2.2 | Yellow transparent liquid | Rich snow-covered rhododendron odor | Mount Laplace in Christian province |
| 2 | 1.8 | Yellow transparent liquid | Rich snow-covered rhododendron odor | Milin county |
| 3 | 2.2 | Yellow transparent liquid | Smell of boiling in water, weak fragrance of snow-layer rhododendron | Mount Laplace in Christian province |
| 4 | 2.4 | Yellow transparent liquid | Smell of boiling in water, weak fragrance of snow-layer rhododendron | Mount Laplace in Christian province |
| 5 | 1.8 | Yellow transparent liquid | Rich snow-covered rhododendron odor | Mount Laplace in Christian province |
| 6 | 2.2 | Yellow transparent liquid | Fragrant of snow-layer rhododendron and weak sense of mint | Mount Laplace in Christian province |
| 7 | 2.0 | Yellow transparent liquid | The fragrance of the rhododendron with the snow layer is lost | Mount Laplace in Christian province |
From the results of tables 1 and 2, it is understood that the yield and flavor of example 1 are optimum. From examples 1 to 7 and evaluation results, it can be seen that the snow rhododendron essential oil with good state and better aroma quality can be extracted by using water distillation extraction combined with fine extraction and impurity removal of molecular distillation equipment under the process conditions of example 1.
In addition, as an example, the rhododendron hybridum essential oil extracted and prepared in the example 1 is taken as a raw material and is respectively added into a household cleaning product, perfume, daily necessities and cosmetics in a proper amount, and detection shows that the product added with the rhododendron hybridum essential oil has special and rich rhododendron hybridum aroma.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. The extraction method of the rhododendron essential oil is characterized by comprising the following steps of:
(1) mixing and pulverizing branches and leaves of snow-layer rhododendron;
(2) distilling and extracting in a water distillation device to obtain crude essential oil;
(3) centrifuging the crude essential oil obtained in the step (2), taking the upper clear essential oil, adding a drying agent, and drying until the essential oil is clear and transparent;
(4) sealing and aging the essential oil obtained in the step (3) for three days at normal temperature in a dark place;
(5) and (3) separating and finely extracting the aged essential oil on molecular distillation equipment to obtain the snow rhododendron essential oil.
2. The extraction method according to claim 1, characterized in that: the snow-layer rhododendron is grown in Tibet Quilashan or Milin county.
3. The extraction method according to claim 1, characterized in that: in the step (1), the crushed mesh number is 200-400 meshes.
4. The extraction method according to claim 1, characterized in that: in the step (2), the distillation extraction process is to add water into a water distillation device for extraction, wherein the water adding proportion is that the plant: 1 part of water: and 8, boiling and refluxing for 2h, and collecting refluxed crude essential oil.
5. The extraction method according to claim 1, characterized in that: in the step (3), the speed of centrifugal separation is 3000-10000 rpm, and the time is 3-20 min.
6. The extraction method according to claim 1, characterized in that: in the step (3), the drying agent is anhydrous sodium sulfate or salt bars obtained by drying and removing water.
7. The extraction method according to claim 1, characterized in that: in the step (4), the environmental temperature during aging and standing is 8-35 ℃.
8. The extraction method according to claim 1, characterized in that: in the step (5), the separation and fine extraction is a secondary separation, the temperature of the primary separation is 60-80 ℃, and the stirring speed is 180-220 r/min; the temperature of the secondary separation is 80-150 ℃, and the stirring speed is 180-250 r/min.
9. The rhododendron hybridum essential oil obtained by the extraction method according to claims 1 to 8, which is characterized by comprising the following components in parts by mass:
10. use of the essential oil of rhododendron hybridum according to claim 9 as a raw material for household cleaning products, perfumes, daily necessities, and cosmetics.
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