CN106635425A - Preparation method for essential oil of fresh wintersweet flowers - Google Patents
Preparation method for essential oil of fresh wintersweet flowers Download PDFInfo
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- CN106635425A CN106635425A CN201710077153.XA CN201710077153A CN106635425A CN 106635425 A CN106635425 A CN 106635425A CN 201710077153 A CN201710077153 A CN 201710077153A CN 106635425 A CN106635425 A CN 106635425A
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- Prior art keywords
- wintersweet
- extraction
- oil
- flower
- fresh
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- 235000007519 Chimonanthus praecox Nutrition 0.000 title claims abstract description 48
- 235000015987 Origanum dictamnus Nutrition 0.000 title claims abstract description 48
- 235000004383 Origanum vulgare subsp. vulgare Nutrition 0.000 title claims abstract description 48
- 239000000341 volatile oil Substances 0.000 title claims abstract description 40
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 240000001359 Origanum dictamnus Species 0.000 title claims abstract 16
- 238000000605 extraction Methods 0.000 claims abstract description 59
- 239000003921 oil Substances 0.000 claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 238000004821 distillation Methods 0.000 claims abstract description 17
- 238000000199 molecular distillation Methods 0.000 claims abstract description 9
- 239000003205 fragrance Substances 0.000 claims abstract description 8
- 239000000284 extract Substances 0.000 claims abstract description 7
- 238000000926 separation method Methods 0.000 claims abstract description 6
- 241000628997 Flos Species 0.000 claims description 33
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 11
- 235000015110 jellies Nutrition 0.000 claims description 7
- 239000008274 jelly Substances 0.000 claims description 7
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 6
- 230000001413 cellular effect Effects 0.000 claims description 6
- 210000004700 fetal blood Anatomy 0.000 claims description 6
- 239000012535 impurity Substances 0.000 claims description 6
- 239000001569 carbon dioxide Substances 0.000 claims description 3
- 238000001035 drying Methods 0.000 abstract description 3
- 240000001825 Chimonanthus praecox Species 0.000 description 33
- 239000004480 active ingredient Substances 0.000 description 6
- 230000006378 damage Effects 0.000 description 5
- 239000004615 ingredient Substances 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 238000000638 solvent extraction Methods 0.000 description 4
- 241000220317 Rosa Species 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 241001529246 Platymiscium Species 0.000 description 2
- 239000010692 aromatic oil Substances 0.000 description 2
- 230000003796 beauty Effects 0.000 description 2
- 239000002537 cosmetic Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 239000002304 perfume Substances 0.000 description 2
- 238000002203 pretreatment Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000001256 steam distillation Methods 0.000 description 2
- 244000269722 Thea sinensis Species 0.000 description 1
- 241001464837 Viridiplantae Species 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 235000009508 confectionery Nutrition 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 229930003935 flavonoid Natural products 0.000 description 1
- 235000017173 flavonoids Nutrition 0.000 description 1
- 150000002215 flavonoids Chemical class 0.000 description 1
- 239000000796 flavoring agent Substances 0.000 description 1
- 235000013355 food flavoring agent Nutrition 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 150000004676 glycans Chemical class 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000008204 material by function Substances 0.000 description 1
- 230000003020 moisturizing effect Effects 0.000 description 1
- 229930014626 natural product Natural products 0.000 description 1
- 239000000419 plant extract Substances 0.000 description 1
- 150000008442 polyphenolic compounds Chemical class 0.000 description 1
- 235000013824 polyphenols Nutrition 0.000 description 1
- 239000005017 polysaccharide Substances 0.000 description 1
- 229920001282 polysaccharide Polymers 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 235000013599 spices Nutrition 0.000 description 1
- 238000000194 supercritical-fluid extraction Methods 0.000 description 1
Classifications
-
- 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
- C11B9/025—Recovery by solvent extraction
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Fats And Perfumes (AREA)
Abstract
The invention provides a preparation method for essential oil of fresh wintersweet flowers. The preparation method for the essential oil of the fresh wintersweet flowers comprises the following steps: pretreatment, extraction, separation and molecular distillation. Oil and water separated wintersweet flower extracts are sent to molecular distillation equipment for molecular distillation, the column temperature of a distillation column is controlled to be 100 to 110 DEG C, and the distillation pressure is controlled at 1 to 3Pa, thus the essential oil of the wintersweet flowers is controlled. According to the invention, the fresh wintersweet flowers are extracted by utilizing a supercritical CO2 extraction technology, and then separated through an oil-water separator, and distilled to obtain the essential oil of the wintersweet flowers, so that the problems of seriously damaged effective components and the like in the traditional flower-fragrance essential oil extraction process are solved and the loss of volatile components in the fresh flower pretreatment drying process is reduced by adopting a fresh flower extraction method; furthermore, the prepared essential oil is more realistic in aroma.
Description
Technical field
The invention belongs to processing of agriculture product technical field, and in particular to a kind of preparation method of wintersweet ethereal oil of flower.
Background technology
Wintersweet is Calycanthaceae wintersweet platymiscium, and the leaf of the platymiscium, Huadu distribute fragrance, containing volatile aromatic oil thing
Matter, is the traditional garden famous flower of China and raw material green plants, with all good ornamental value of color, perfume (or spice), shape, appearance, rhythm.In Chongqing
Etc. ground establishing in large scale and be applied to the food processings such as tealeaves, drinks, candy.
Flos Mume elegant fragrance, strong fragrance, are also China's tradition cellar for storing things tea perfume flower with volatile aromatic oil, and essential oil is important
Essence and flavoring agent raw material, be widely used in the aspects such as health care, beauty, agricultural and food industry abroad.But it is domestic at present
For the extractive technique of wintersweet flower essential oil falls behind relatively, typically using steam distillation and solvent extraction, this method long-time
High temperature heating conditions under in wintersweet flower essential oil heat-sensitive ingredients destruction it is larger, facile hydrolysis composition is had undesirable effect,
Essential oil quality is not high.The disadvantage of solvent extraction wintersweet flower essential oil is dissolvent residual safety issue.In recent years, it is overcritical
CO2Extraction application of the abstraction technique in active ingredient of natural product is increasingly taken seriously, high with production efficiency, has extracted
Entirely, it is complete to the reservation of active ingredient, no solvent residue, many advantages, such as environmentally safe.
At present supercritical liquid extraction technique almost extracts mode in the extraction application of Rose Absolute with dried flower, while
Research in terms of Flos Mume active ingredient extraction is little, and especially extraction direct to fresh flower is rarely reported；Traditional handicraft is main
It is steam distillation and solvent extraction, but occurs because long-time high temperature breaks to the heat-sensitive ingredients in wintersweet flower essential oil
In bad and solvent extraction wintersweet flower essential oil the problems such as the security of dissolvent residual.
The content of the invention
The problem to be solved in the present invention is to provide a kind of wintersweet fresh flower for the above-mentioned deficiency in the presence of prior art
The preparation method of essential oil reduces the destruction of active ingredient.
For achieving the above object, present invention employs following technical scheme：
A kind of preparation method of wintersweet ethereal oil of flower, comprises the steps：
(1) pre-process：Flos Mume selects removal of impurities after plucking, -20 DEG C～-15 DEG C Cord bloods in jelly storehouse；
(2) extract and separate：Flos Mume after Cord blood is extracted and is separated and obtained fresh wintersweet flower concrete；
(3) molecular clock：Wintersweet flower concrete after separation is sent in molecular distillation equipment carries out molecular clock, distillation column
100-110 DEG C of column temperature, distillation pressure is controlled in 1-3Pa, and wintersweet flower essential oil is obtained.
Further, step 2) in extraction be that Flos Mume is loaded into supercritical CO2Supercritical CO is carried out in extraction kettle2Extraction,
Extracting pressure control in 22-30MPa, extraction temperature control at 40-60 DEG C, carbon dioxide flow 0.6-0.7m3/ h, separates I pressures
Power controls 6-8MPa, separates I temperature controls at 50-60 DEG C, separates II pressure 5-6MPa, separates II temperature at 25-30 DEG C, extraction
Time control collects extraction product in 2-4 hours.
Further, step 2) in be separated into water-oil separating, extraction product described above is placed in oil water separator,
Water-oil separating is carried out under the conditions of 45-55 DEG C, fresh wintersweet flower concrete is obtained.
Further, step 2) in above-mentioned extraction product is placed in oil water separator, profit is carried out under the conditions of 45-55 DEG C
The cellular water with Flos Mume fragrance can also be obtained after separation.
Further, step 1) in Flos Mume adopt fresh Flos Mume, freeze storehouse temperature setting be -18 DEG C, not at drying
Reason.
Compared to prior art, the present invention has the advantages that：The present invention utilizes supercritical CO2Abstraction technique is extracted
Fresh Flos Mume, then Jing oil water separators are separated, then are obtained plum blossom essential oil through distillation and not only solved traditional Rose Absolute
The problems such as destruction of extraction process active ingredient is serious, while taking fresh flower extracting mode to reduce fresh flower pre-treatment dry run to waving
The loss of the property sent out composition, obtained essential oil fragrance is more true to nature；While isolated wintersweet flower essential oil and the cured product of Flos Mume, plus
Upper super critical extraction process gained Flos Mume cellular water, it is higher that three kinds of products of this technology can provide specific aim for cosmetic industry
Plant extract raw material.
The further advantage of the present invention, target and feature embody part by description below, and part will also be by this
The research of invention and practice and be understood by the person skilled in the art.
Specific embodiment
In order that the technological means of present invention realization, creation characteristic, reached purpose are more clear with effect and are apparent to,
With reference to specific embodiment, the present invention is further elaborated：
The present invention proposes a kind of preparation method of wintersweet ethereal oil of flower, comprises the steps：
(1) pre-process：Flos Mume selects removal of impurities after plucking, -20 DEG C～-15 DEG C Cord bloods in jelly storehouse；
(2) Jing extractions and isolated fresh wintersweet flower concrete；
(3) molecular clock：Molecular clock is carried out by sending in molecular distillation equipment through the wintersweet flower concrete of water-oil separating,
100-110 DEG C of distillation column column temperature, distillation pressure is controlled in 1-3Pa, and wintersweet flower essential oil is obtained.
The present invention selects removal of impurities and carries out Cord blood and avoids Flos Mume cell from being destroyed after first is plucked Flos Mume, then Jing
Extraction and isolated fresh wintersweet flower concrete are reduced to the heat-sensitive ingredients destruction in wintersweet flower essential oil and avoid essence
The security of dissolvent residual in oil, and wintersweet flower essential oil is obtained by molecular clock not only solves traditional Rose Absolute and extract
The problems such as destruction of process active ingredient is serious, while taking fresh flower extracting mode to reduce fresh flower pre-treatment dry run to volatility
The loss of composition, obtained essential oil fragrance is more true to nature.
Used as specific embodiment, extraction mode is that Flos Mume is loaded into supercritical CO2Supercritical CO is carried out in extraction kettle2Extraction
Take, extracting pressure control in 22-30MPa, extraction temperature control at 40-60 DEG C, carbon dioxide flow 0.6-0.7m3/ h, separates I
Stress control 6-8MPa, separates I temperature controls at 50-60 DEG C, separates II pressure 5-6MPa, separates II temperature at 25-30 DEG C, extraction
Time control is taken in 2-4 hours, extraction product is collected, it is ensured that the purity of extraction product is high.
Used as specific embodiment, separation adopts water-oil separating, the extraction product is placed in oil water separator, in 45-
Water-oil separating is carried out under the conditions of 55 DEG C, fresh wintersweet flower concrete is obtained so as to convenient prepared wintersweet ethereal oil of flower.
As specific embodiment, 1kg Flos Mume is taken out from jelly storehouse, supercritical CO is loaded in time2Carry out in extraction kettle
Supercritical CO2Extraction, extracting pressure 28MPa, 45 DEG C of extraction temperature, CO2Flow 0.6m3/ h, separates I pressure 7MPa, separates I temperature
50 DEG C of degree, separates II pressure 6MPa, separates 30 DEG C of II temperature, and extraction time 2h collects extraction product；Above-mentioned extraction product is put
In oil water separator, the insulation under the conditions of 45 DEG C carries out water-oil separating, obtains fresh wintersweet flower concrete；By through water-oil separating
Fresh wintersweet flower concrete is sent into and carry out in molecular distillation equipment molecular clock, and 110 DEG C of distillation column column temperature, distillation pressure control exists
1Pa, is obtained wintersweet flower essential oil 0.8207kg, and extraction of essential oil rate is 92.07%.
As specific embodiment, 1kg Flos Mume is taken out from jelly storehouse, supercritical CO is loaded in time2Carry out in extraction kettle
Supercritical CO2Extraction, extracting pressure 22MPa, 35 DEG C of extraction temperature, CO2Flow 0.6m3/ h, separates I pressure 7.0MPa, separates I
Temperature 50 C, separates II pressure 6MPa, separates 30 DEG C of II temperature, and extraction time 2h collects extraction product；By above-mentioned extraction product
In being placed in oil water separator, the insulation under the conditions of 45 DEG C carries out water-oil separating, obtains fresh wintersweet flower concrete；Will be through water-oil separating
Fresh wintersweet flower concrete send in molecular distillation equipment and carry out molecular clock, 110 DEG C of distillation column column temperature, distillation pressure control exists
2Pa, is obtained wintersweet flower essential oil 0.5621kg, and extraction of essential oil rate is 66.21%.
As specific embodiment, 1kg Flos Mume is taken out from jelly storehouse, distillation column column temperature arranges 110 DEG C, distillation pressure control
Make in 2Pa, and respectively to extracting pressure, extraction temperature, CO2Flow and extraction time adjust accordingly and obtain corresponding essence
Oil extract rate such as table 1.
Table 1
As specific embodiment, 1kg Flos Mume is taken out from jelly storehouse, supercritical CO is loaded in time2Carry out in extraction kettle
Supercritical CO2Extraction, extracting pressure 22MPa, 35 DEG C of extraction temperature, CO2Flow 0.66m3/ h, separates I pressure 7.0MPa, separates I
Temperature 50 C, separates II pressure 6MPa, separates 30 DEG C of II temperature, and extraction time 2h collects extraction product；By above-mentioned extraction product
In being placed in oil water separator, insulation carries out water-oil separating, obtains fresh wintersweet flower concrete；By through the fresh Flos Mume of water-oil separating
Medicinal extract is sent into and carry out in molecular distillation equipment molecular clock, and 110 DEG C of distillation column column temperature, distillation pressure is controlled in 2Pa, water-oil separating
Temperature is respectively provided with 40 DEG C, 45 DEG C, 50 DEG C, 55 DEG C and 60 DEG C, be obtained wintersweet flower essential oil 0.3621kg, 0.5621kg,
0.5661kg, 0.5641kg and 0.4621kg, as long as so as to show that the control of water-oil separating temperature is just carried at 45-55 DEG C to essential oil
Taking rate affects little.
As specific embodiment, step 1) in Flos Mume pluck fresh Flos Mume, choose fresh petal, avoid as far as possible cured
Plum blossom cell is destroyed, while select impurity elimination during avoiding holding, artificial manual screening as far as possible, if amount than it is larger when
Impurity can also be gone out by screen, fresh Flos Mume be plucked due to needing reduction cell to be destroyed, so before freezing not
Drying process, it is -15 DEG C～-20 DEG C to freeze storehouse temperature setting, the work that can be played refrigeration preferably with -18 DEG C and can rise to freeze
With.
As specific embodiment, step 3) in above-mentioned extraction product is placed in oil water separator, under the conditions of 45-55 DEG C
Carry out that Flos Mume cellular water can also be obtained after water-oil separating；The Flos Mume cellular water belongs to natural small molecule active water, can be with
Be absorbed by the body rapidly completely, due to the volatile ingredient and polysaccharide in the Flos Mume cellular water also containing part Flos Mume,
The functional materials such as polyphenol, flavonoids, so having the maintaining beauty and keeping youngs such as moisturizing, tender skin, skin care, increase skin vitality, be
The raw material sources of cosmetic industry high-quality.
Finally illustrate, above example is only unrestricted to illustrate technical scheme, although with reference to compared with
Good embodiment has been described in detail to the present invention, it will be understood by those within the art that, can be to the skill of the present invention
Art scheme is modified or equivalent, and without deviating from the objective and scope of technical solution of the present invention, it all should cover at this
In the middle of the right of invention.
Claims (5)
1. a kind of preparation method of wintersweet ethereal oil of flower, it is characterised in that comprise the steps：
(1) pre-process：Flos Mume selects removal of impurities after plucking, -20 DEG C～-15 DEG C Cord bloods in jelly storehouse；
(2) extract and separate：Flos Mume after Cord blood is extracted and is separated and obtained fresh wintersweet flower concrete；
(3) molecular clock：Wintersweet flower concrete after separation is sent in molecular distillation equipment carries out molecular clock, distillation column column temperature
At 100-110 DEG C, distillation pressure is controlled in 1-3Pa for control, and wintersweet flower essential oil is obtained.
2. the preparation method of a kind of wintersweet ethereal oil of flower according to claim 1, it is characterised in that：Step 2) in extraction
It is that Flos Mume is loaded into supercritical CO2Supercritical CO is carried out in extraction kettle2Extraction, extracting pressure control is in 22-30MPa, extraction temperature
Degree control at 40-60 DEG C, carbon dioxide flow 0.6-0.7m3/ h, separates I Stress control 6-8MPa, separates I temperature controls and exists
50-60 DEG C, II pressure 5-6MPa are separated, separate II temperature at 25-30 DEG C, extraction time control is collected extraction and produced in 2-4 hours
Thing.
3. the preparation method of a kind of wintersweet ethereal oil of flower according to claim 2, it is characterised in that：Step 2) in separation
For water-oil separating, the extraction product is placed in oil water separator, water-oil separating is carried out under the conditions of 45-55 DEG C, obtain fresh
Wintersweet flower concrete.
4. the preparation method of a kind of wintersweet ethereal oil of flower according to claim 3, it is characterised in that：Step 2) in will be above-mentioned
Extraction product is placed in oil water separator, can also be obtained with Flos Mume fragrance after carrying out water-oil separating under the conditions of 45-55 DEG C
Cellular water.
5. the preparation method of a kind of wintersweet ethereal oil of flower according to claim 1, it is characterised in that：Step 1) in Flos Mume
Using fresh Flos Mume, it is -18 DEG C to freeze storehouse temperature setting, without dried process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710077153.XA CN106635425A (en) | 2017-02-13 | 2017-02-13 | Preparation method for essential oil of fresh wintersweet flowers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710077153.XA CN106635425A (en) | 2017-02-13 | 2017-02-13 | Preparation method for essential oil of fresh wintersweet flowers |
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| Publication Number | Publication Date |
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| CN106635425A true CN106635425A (en) | 2017-05-10 |
Family
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| CN201710077153.XA Pending CN106635425A (en) | 2017-02-13 | 2017-02-13 | Preparation method for essential oil of fresh wintersweet flowers |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107227205A (en) * | 2017-06-28 | 2017-10-03 | 徐州菲泰克农业科技有限公司 | A kind of preparation method of okra essential oil |
| CN107400563A (en) * | 2017-09-20 | 2017-11-28 | 江苏福美景点开发有限公司 | For extracting the process units and its production method of fragrant plant composition |
| CN108949353A (en) * | 2018-07-04 | 2018-12-07 | 湖南省农产品加工研究所 | A kind of extracting method of bitter citrus immature flower essential oil |
| CN110903908A (en) * | 2019-12-13 | 2020-03-24 | 河北省农林科学院遗传生理研究所（河北省农林科学院农产品质量安全研究中心） | Preparation method of natural pear essence |
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| CN102199492A (en) * | 2011-04-29 | 2011-09-28 | 张南 | A kind of wax plum essential oil extraction process |
| CN103305344A (en) * | 2013-06-18 | 2013-09-18 | 菏泽尧舜牡丹生物科技有限公司 | Method for extracting peony essence from fresh peony flowers |
| CN104031744A (en) * | 2014-06-27 | 2014-09-10 | 湖北五柳源生物科技有限责任公司 | Supercritical CO2 extraction method for chimonanthus praecox essential oil |
| US9296979B1 (en) * | 2014-12-12 | 2016-03-29 | Metal Industries Research & Development Centre | Flower essential oil extraction method |
-
2017
- 2017-02-13 CN CN201710077153.XA patent/CN106635425A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102199492A (en) * | 2011-04-29 | 2011-09-28 | 张南 | A kind of wax plum essential oil extraction process |
| CN103305344A (en) * | 2013-06-18 | 2013-09-18 | 菏泽尧舜牡丹生物科技有限公司 | Method for extracting peony essence from fresh peony flowers |
| CN104031744A (en) * | 2014-06-27 | 2014-09-10 | 湖北五柳源生物科技有限责任公司 | Supercritical CO2 extraction method for chimonanthus praecox essential oil |
| US9296979B1 (en) * | 2014-12-12 | 2016-03-29 | Metal Industries Research & Development Centre | Flower essential oil extraction method |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107227205A (en) * | 2017-06-28 | 2017-10-03 | 徐州菲泰克农业科技有限公司 | A kind of preparation method of okra essential oil |
| CN107400563A (en) * | 2017-09-20 | 2017-11-28 | 江苏福美景点开发有限公司 | For extracting the process units and its production method of fragrant plant composition |
| CN108949353A (en) * | 2018-07-04 | 2018-12-07 | 湖南省农产品加工研究所 | A kind of extracting method of bitter citrus immature flower essential oil |
| CN108949353B (en) * | 2018-07-04 | 2022-02-22 | 湖南省农产品加工研究所 | A kind of extraction method of tortoiseshell essential oil |
| CN110903908A (en) * | 2019-12-13 | 2020-03-24 | 河北省农林科学院遗传生理研究所（河北省农林科学院农产品质量安全研究中心） | Preparation method of natural pear essence |
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