CN103627526A - Method for extracting yellow cinnamon leaf essential oil - Google Patents
Method for extracting yellow cinnamon leaf essential oil Download PDFInfo
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- CN103627526A CN103627526A CN201310630681.5A CN201310630681A CN103627526A CN 103627526 A CN103627526 A CN 103627526A CN 201310630681 A CN201310630681 A CN 201310630681A CN 103627526 A CN103627526 A CN 103627526A
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- 241000723347 Cinnamomum Species 0.000 title claims abstract description 124
- 235000017803 cinnamon Nutrition 0.000 title claims abstract description 123
- 239000000341 volatile oil Substances 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 24
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 66
- 238000000605 extraction Methods 0.000 claims abstract description 49
- 238000001256 steam distillation Methods 0.000 claims abstract description 16
- 239000012535 impurity Substances 0.000 claims abstract description 11
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 40
- 238000004821 distillation Methods 0.000 claims description 35
- 239000012530 fluid Substances 0.000 claims description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 26
- 238000000926 separation method Methods 0.000 claims description 22
- 239000000463 material Substances 0.000 claims description 21
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 20
- 239000001569 carbon dioxide Substances 0.000 claims description 20
- 239000000284 extract Substances 0.000 claims description 12
- 239000003795 chemical substances by application Substances 0.000 claims description 10
- 239000010685 fatty oil Substances 0.000 claims description 10
- 230000008676 import Effects 0.000 claims description 4
- 239000008346 aqueous phase Substances 0.000 abstract 1
- 238000001035 drying Methods 0.000 abstract 1
- 238000000194 supercritical-fluid extraction Methods 0.000 abstract 1
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- 201000010099 disease Diseases 0.000 description 5
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- DSSYKIVIOFKYAU-XCBNKYQSSA-N (R)-camphor Chemical compound C1C[C@@]2(C)C(=O)C[C@@H]1C2(C)C DSSYKIVIOFKYAU-XCBNKYQSSA-N 0.000 description 4
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- CDOSHBSSFJOMGT-UHFFFAOYSA-N linalool Chemical compound CC(C)=CCCC(C)(O)C=C CDOSHBSSFJOMGT-UHFFFAOYSA-N 0.000 description 2
- 208000026435 phlegm Diseases 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000003815 supercritical carbon dioxide extraction Methods 0.000 description 2
- NPNUFJAVOOONJE-ZIAGYGMSSA-N β-(E)-Caryophyllene Chemical compound C1CC(C)=CCCC(=C)[C@H]2CC(C)(C)[C@@H]21 NPNUFJAVOOONJE-ZIAGYGMSSA-N 0.000 description 2
- LFJQCDVYDGGFCH-JTQLQIEISA-N (+)-β-phellandrene Chemical compound CC(C)[C@@H]1CCC(=C)C=C1 LFJQCDVYDGGFCH-JTQLQIEISA-N 0.000 description 1
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- WUOACPNHFRMFPN-SECBINFHSA-N (S)-(-)-alpha-terpineol Chemical compound CC1=CC[C@@H](C(C)(C)O)CC1 WUOACPNHFRMFPN-SECBINFHSA-N 0.000 description 1
- WEEGYLXZBRQIMU-UHFFFAOYSA-N 1,8-cineole Natural products C1CC2CCC1(C)OC2(C)C WEEGYLXZBRQIMU-UHFFFAOYSA-N 0.000 description 1
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- WEEGYLXZBRQIMU-WAAGHKOSSA-N Eucalyptol Chemical compound C1C[C@H]2CC[C@]1(C)OC2(C)C WEEGYLXZBRQIMU-WAAGHKOSSA-N 0.000 description 1
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Abstract
The invention aims to provide a method for extracting yellow cinnamon leaf essential oil by combination of steam distillation and supercritical CO2 extraction. The method comprises the following steps: distilling yellow cinnamon leaves with steam to remove impurity components dissolved in an aqueous phase, drying the extracted yellow cinnamon leaves, feeding the dried yellow cinnamon leaves into a supercritical extraction device, and extracting the yellow cinnamon leaf essential oil from the yellow cinnamon leaves in the presence of ethanol serving as an entrainer. According to the method, the yield of the yellow cinnamon leaf essential oil can be obviously improved and a high-quality essential oil product is obtained.
Description
Technical field
The invention belongs to method of extraction of essential oil, be specifically related to a kind of extracting method of leaf of Yellow cinnamon essential oil.
Background technology
Essential oil is the general name in plant materials with certain volatile oily composition; there is more biomedicine active; as anti-inflammatory, ease pain, calm the nerves, expelling parasite, eliminate the phlegm, cough-relieving, wind dispelling, sweating, degerming, skin care etc.; to improving the normal physiological activity of human body, promote and protect immunity system to have great importance.Studies have shown that, different essential oils for the disease of internal secretion, metabolism, urinary system, venereal disease, immunity system, gynaecopathia, muscle, skeletal diseases, dermatosis, neural system and mental disorder, eye, nose, oral cavity, odontopathy, respiratory system aspect, the disease of the disease of blood circulation aspect, Digestive tract aspect has good curative effect.But due to the synthetic intrinsic reasons such as insecurity of essential oil of chemical industry, be often limited to use.
Fragrant camphor tree [
cinnamomum camphora (L.) Presl.] be Lauraceae cinnamon, another name: wooden camphor tree, black camphor tree, fragrant camphor tree, kind camphor tree, fragrant stamen, camphorwood.For the seeds that represent of Subtropical Evergreen Broad-leaf Forest, be mainly distributed in each provinces and regions, south, generally for shade tree, subdistrict greening etc.Fragrant camphor tree is one of seeds of economic worth maximum in cinnamon, and its property and flavor of peppery and warm is nontoxic.Leaf of Yellow cinnamon essence main body of oil is camphor, phantol, eucalyptol, alpha-terpineol, caryophyllene, cnidium monnieri-6-alkene-4-alcohol, β-phellandrene etc., and wherein the ratio of contained phantol and camphor is maximum.Studies have shown that, the leaf of Yellow cinnamon essential oil bronchial smooth muscle that can relax, remarkable to asthmatic bronchitis and antiasthmatic effect, there are certain cough-relieving, phlegm-dispelling functions simultaneously.
The difference of the extracting method of leaf of Yellow cinnamon essential oil, extraction process and extraction raw material, the roughly composition of the leaf of Yellow cinnamon essential oil extracting is also different.At present, the compartment analysis to plant leaf, fruit essential oil, mostly adopts steam distillation, and this method is comparatively stable, but also has certain shortcoming.In research > > mono-literary composition of < < supercritical carbon dioxide extraction method and extraction by steam distillation kaempferia galamga chemical composition of volatile oil, carried out the contrast experiment of wet distillation and supercritical carbon dioxide extraction, result shows, extraction by steam distillation process time is long, temperature is high, open system, its process easily causes destruction and the volatilization loss of thermally labile and oxidizable composition, and part component is had to destruction.
Summary of the invention
The object of the invention is to overcome prior art deficiency and provide a kind of method that wet distillation is combined with SCF-CO 2 method to extract leaf of Yellow cinnamon essential oil.This method can significantly improve leaf of Yellow cinnamon essential oil yield, and obtains the good essential oil product of quality.
An extracting method for leaf of Yellow cinnamon essential oil, comprises the following steps:
Step 1, cures leaf of Yellow cinnamon to be dried to water content 3%～8%, then with scissors, the leaf of Yellow cinnamon after curing is cut into the sheet that size is 4cm * 6cm;
Step 2, adds water by the leaf of Yellow cinnamon sheet of step 1 gained and soaks at normal temperatures 2 hours～5 hours, add water and leaf of Yellow cinnamon sheet mass ratio be 2:1～8:1;
Step 3, adopts steam distillation to distill step 2 gained leaf of Yellow cinnamon sheet, and distillation temperature is 50 ℃～80 ℃, and distillation time is 2～3 hours, removes the impurity distilling out;
Step 4, the leaf of Yellow cinnamon sheet that wet distillation was extracted is collected, and after being again dried, with ethanol, as entrainment agent, mixes with dried leaf of Yellow cinnamon sheet, obtains material solution, and the mass ratio of ethanol used and leaf of Yellow cinnamon sheet is 1:20～1:50;
Step 5, imports step 4 gained material solution in extraction kettle, in extraction kettle, inputs supercritical carbon dioxide fluid, in extracting pressure, is that 10MPa～50MPa, extraction temperature are to extract at 30 ℃～80 ℃, and extraction time is 1h～5h;
Step 6, the supercritical carbon dioxide fluid that is dissolved with extract enters rectifying column separation through reducing valve, and rectifying column pressure is 8MPa～30MPa, and temperature is 20 ℃～65 ℃, the rectifying time is 0.5h～4h, and the wax component that solubleness is less and fatty oil are separated out in rectifying column bottom;
Step 7, it is separated that the larger leaf of Yellow cinnamon essential oil of solubleness and ethanol enter in separator through reducing valve with CO 2 fluid, and separating pressure is 10MPa～25MPa, and separation temperature is 20 ℃～65 ℃, and disengaging time is 0.5h～4h.
The mass ratio that adds water and leaf of Yellow cinnamon sheet in above-mentioned steps 2 is 3:1～6:1.
In above-mentioned steps 3, the distillation temperature of steam distillation is 60 ℃～70 ℃.
In above-mentioned steps 4, the mass ratio of ethanol used and leaf of Yellow cinnamon sheet is 1:30～1:40.
In above-mentioned steps 5, extracting pressure is that 20MPa～40MPa, extraction temperature are 40 ℃～70 ℃.
In above-mentioned steps 6, rectifying column pressure is 12MPa～25MPa, and temperature is 30 ℃～55 ℃.
In above-mentioned steps 7, separating pressure is 12MPa～20MPa, and separation temperature is 30 ℃～55 ℃.
The extracting method of above-mentioned leaf of Yellow cinnamon essential oil, comprises the following steps:
Step 1, cures leaf of Yellow cinnamon to be dried to water content 4%, then with scissors, the leaf of Yellow cinnamon after curing is cut into the sheet that size is 4cm * 6cm;
Step 2, adds water by the leaf of Yellow cinnamon sheet of step 1 gained and soaks at normal temperatures 3.2 hours, add water and leaf of Yellow cinnamon sheet mass ratio be 4:1;
Step 3, adopts steam distillation to distill step 2 gained leaf of Yellow cinnamon sheet, and distillation temperature is 65 ℃, and distillation time is 2.5 hours, removes the impurity distilling out;
Step 4, the leaf of Yellow cinnamon sheet that wet distillation was extracted is collected, and after being again dried, with ethanol, as entrainment agent, mixes with dried leaf of Yellow cinnamon sheet, obtains material solution, and the mass ratio of ethanol used and leaf of Yellow cinnamon sheet is 1:35;
Step 5, imports step 4 gained material solution in extraction kettle, in extraction kettle, inputs supercritical carbon dioxide fluid, in extracting pressure, is that 22MPa, extraction temperature are to extract at 65 ℃, and extraction time is 2.5h;
Step 6, the supercritical carbon dioxide fluid that is dissolved with extract enters rectifying column separation through reducing valve, and rectifying column pressure is 24MPa, and temperature is 40 ℃, and the rectifying time is 2.3h, the wax component that solubleness is less and fatty oil are separated out in rectifying column bottom;
Step 7, it is separated that the larger leaf of Yellow cinnamon essential oil of solubleness and ethanol enter in separator through reducing valve with CO 2 fluid, and separating pressure is 13MPa, and separation temperature is 33 ℃, and disengaging time is 2.5h.
The present invention compared with prior art its remarkable advantage is: the first, and the present invention extracts the leaf of Yellow cinnamon essential oil color and luster clarification obtaining, the natural fragrance of fragrance, outward appearance and quality are all splendid; The second, the present invention does not add any poisonous and harmful solvent, so the absolutely not any chemical solvents of product is residual, has prevented the pollution to environment of harmful chemical residual and the course of processing; The 3rd, the present invention significantly improves compared with traditional extraction process yield, and the yield that originally wet distillation obtains essential oil is about 2% left and right, and a large amount of essential oils are present in leaf of Yellow cinnamon and do not extract, and cause very large waste, and yield of the present invention, 6%～10%, has had and significantly improved.
Embodiment
Embodiment 1
500g leaf of Yellow cinnamon is cured and is dried to water content 3%, then with scissors, the leaf of Yellow cinnamon after curing is cut into the sheet that size is 4cm * 6cm; Leaf of Yellow cinnamon sheet is added to 970g water to be soaked 2 hours at normal temperatures; Adopt steam distillation to distill leaf of Yellow cinnamon sheet, distillation temperature is 50 ℃, and distillation time is 2 hours, removes the impurity distilling out; The leaf of Yellow cinnamon sheet that wet distillation was extracted is collected, and after being again dried, with ethanol, as entrainment agent, mixes with dried leaf of Yellow cinnamon sheet, obtains material solution, and the mass ratio of ethanol used and leaf of Yellow cinnamon sheet is 1:20; Gained material solution being imported in extraction kettle, in extraction kettle, input supercritical carbon dioxide fluid, is that 10MPa, extraction temperature are to extract at 30 ℃ in extracting pressure, and extraction time is 1h; The supercritical carbon dioxide fluid that is dissolved with extract enters rectifying column separation through reducing valve, and rectifying column pressure is 8MPa, and temperature is 20 ℃, and the rectifying time is 0.5h, and the wax component that solubleness is less and fatty oil are separated out in rectifying column bottom; It is separated that the larger leaf of Yellow cinnamon essential oil of solubleness and ethanol enter in separator through reducing valve with CO 2 fluid, and separating pressure is 10MPa, and separation temperature is 20 ℃, and disengaging time is 0.5h.Obtain leaf of Yellow cinnamon essential oil 40g, yield is 8%.
Embodiment 2
850g leaf of Yellow cinnamon is cured and is dried to water content 5%, then with scissors, the leaf of Yellow cinnamon after curing is cut into the sheet that size is 4cm * 6cm; Leaf of Yellow cinnamon sheet is added to 2422.5g water to be soaked 3 hours at normal temperatures; Adopt steam distillation to distill leaf of Yellow cinnamon sheet, distillation temperature is 60 ℃, and distillation time is 3 hours, removes the impurity distilling out; The leaf of Yellow cinnamon sheet that wet distillation was extracted is collected, and after being again dried, with ethanol, as entrainment agent, mixes with dried leaf of Yellow cinnamon sheet, obtains material solution, and the mass ratio of ethanol used and leaf of Yellow cinnamon sheet is 1:30; Gained material solution being imported in extraction kettle, in extraction kettle, input supercritical carbon dioxide fluid, is that 20MPa, extraction temperature are to extract at 40 ℃ in extracting pressure, and extraction time is 2h; The supercritical carbon dioxide fluid that is dissolved with extract enters rectifying column separation through reducing valve, and rectifying column pressure is 12MPa, and temperature is 30 ℃, and the rectifying time is 1.5h, and the wax component that solubleness is less and fatty oil are separated out in rectifying column bottom; It is separated that the larger leaf of Yellow cinnamon essential oil of solubleness and ethanol enter in separator through reducing valve with CO 2 fluid, and separating pressure is 12MPa, and separation temperature is 30 ℃, and disengaging time is 1.5h.Obtain leaf of Yellow cinnamon essential oil 51g, yield is 6.5%.
Embodiment 3
1000g leaf of Yellow cinnamon is cured and is dried to water content 4%, then with scissors, the leaf of Yellow cinnamon after curing is cut into the sheet that size is 4cm * 6cm; Leaf of Yellow cinnamon sheet is added to 5088g water to be soaked 4 hours at normal temperatures; Adopt steam distillation to distill leaf of Yellow cinnamon sheet, distillation temperature is 70 ℃, and distillation time is 3 hours, removes the impurity distilling out; The leaf of Yellow cinnamon sheet that wet distillation was extracted is collected, and after being again dried, with ethanol, as entrainment agent, mixes with dried leaf of Yellow cinnamon sheet, obtains material solution, and the mass ratio of ethanol used and leaf of Yellow cinnamon sheet is 1:40; Gained material solution being imported in extraction kettle, in extraction kettle, input supercritical carbon dioxide fluid, is that 40MPa, extraction temperature are to extract at 70 ℃ in extracting pressure, and extraction time is 3h; The supercritical carbon dioxide fluid that is dissolved with extract enters rectifying column separation through reducing valve, and rectifying column pressure is 25MPa, and temperature is 55 ℃, and the rectifying time is 4h, and the wax component that solubleness is less and fatty oil are separated out in rectifying column bottom; It is separated that the larger leaf of Yellow cinnamon essential oil of solubleness and ethanol enter in separator through reducing valve with CO 2 fluid, and separating pressure is 20MPa, and separation temperature is 55 ℃, and disengaging time is 3.5h.Obtain leaf of Yellow cinnamon essential oil 93g, yield is 9.3%.
Embodiment 4
850g leaf of Yellow cinnamon is cured and is dried to water content 6%, then with scissors, the leaf of Yellow cinnamon after curing is cut into the sheet that size is 4cm * 6cm; Leaf of Yellow cinnamon sheet is added to 4794g water to be soaked 5 hours at normal temperatures; Adopt steam distillation to distill leaf of Yellow cinnamon sheet, distillation temperature is 80 ℃, and distillation time is 2 hours, removes the impurity distilling out; The leaf of Yellow cinnamon sheet that wet distillation was extracted is collected, and after being again dried, with ethanol, as entrainment agent, mixes with dried leaf of Yellow cinnamon sheet, obtains material solution, and the mass ratio of ethanol used and leaf of Yellow cinnamon sheet is 1:50; Gained material solution being imported in extraction kettle, in extraction kettle, input supercritical carbon dioxide fluid, is that 50MPa, extraction temperature are to extract at 80 ℃ in extracting pressure, and extraction time is 5h; The supercritical carbon dioxide fluid that is dissolved with extract enters rectifying column separation through reducing valve, and rectifying column pressure is 30MPa, and temperature is 65 ℃, and the rectifying time is 3.5h, and the wax component that solubleness is less and fatty oil are separated out in rectifying column bottom; It is separated that the larger leaf of Yellow cinnamon essential oil of solubleness and ethanol enter in separator through reducing valve with CO 2 fluid, and separating pressure is 25MPa, and separation temperature is 65 ℃, and disengaging time is 4h.Obtain leaf of Yellow cinnamon essential oil 85g, yield is 10%.
Embodiment 5
900g leaf of Yellow cinnamon is cured and is dried to water content 8%, then with scissors, the leaf of Yellow cinnamon after curing is cut into the sheet that size is 4cm * 6cm; Leaf of Yellow cinnamon sheet is added to 6624g water to be soaked 5 hours at normal temperatures; Adopt steam distillation to distill leaf of Yellow cinnamon sheet, distillation temperature is 80 ℃, and distillation time is 3 hours, removes the impurity distilling out; The leaf of Yellow cinnamon sheet that wet distillation was extracted is collected, and after being again dried, with ethanol, as entrainment agent, mixes with dried leaf of Yellow cinnamon sheet, obtains material solution, and the mass ratio of ethanol used and leaf of Yellow cinnamon sheet is 1:50; Gained material solution being imported in extraction kettle, in extraction kettle, input supercritical carbon dioxide fluid, is that 50MPa, extraction temperature are to extract at 80 ℃ in extracting pressure, and extraction time is 5h; The supercritical carbon dioxide fluid that is dissolved with extract enters rectifying column separation through reducing valve, and rectifying column pressure is 30MPa, and temperature is 65 ℃, and the rectifying time is 3.5h, and the wax component that solubleness is less and fatty oil are separated out in rectifying column bottom; It is separated that the larger leaf of Yellow cinnamon essential oil of solubleness and ethanol enter in separator through reducing valve with CO 2 fluid, and separating pressure is 25MPa, and separation temperature is 65 ℃, and disengaging time is 4h.Obtain leaf of Yellow cinnamon essential oil 68.4g, yield is 7.6%.
Embodiment 6
1000g leaf of Yellow cinnamon is cured and is dried to water content 4%, then with scissors, the leaf of Yellow cinnamon after curing is cut into the sheet that size is 4cm * 6cm; Leaf of Yellow cinnamon sheet is added to 4500g water to be soaked 3.2 hours at normal temperatures; Adopt steam distillation to distill leaf of Yellow cinnamon sheet, distillation temperature is 65 ℃, and distillation time is 2.5 hours, removes the impurity distilling out; The leaf of Yellow cinnamon sheet that wet distillation was extracted is collected, and after being again dried, with ethanol, as entrainment agent, mixes with dried leaf of Yellow cinnamon sheet, obtains material solution, and the mass ratio of ethanol used and leaf of Yellow cinnamon sheet is 1:35; Gained material solution being imported in extraction kettle, in extraction kettle, input supercritical carbon dioxide fluid, is that 22MPa, extraction temperature are to extract at 65 ℃ in extracting pressure, and extraction time is 2.5h; The supercritical carbon dioxide fluid that is dissolved with extract enters rectifying column separation through reducing valve, and rectifying column pressure is 24MPa, and temperature is 40 ℃, and the rectifying time is 2.3h, and the wax component that solubleness is less and fatty oil are separated out in rectifying column bottom; It is separated that the larger leaf of Yellow cinnamon essential oil of solubleness and ethanol enter in separator through reducing valve with CO 2 fluid, and separating pressure is 13MPa, and separation temperature is 33 ℃, and disengaging time is 2.5h.Obtain leaf of Yellow cinnamon essential oil 105g, yield is 10.5%.
Claims (8)
1. an extracting method for leaf of Yellow cinnamon essential oil, is characterized in that, comprises the following steps:
Step 1, cures leaf of Yellow cinnamon to be dried to water content 3%～8%, then with scissors, the leaf of Yellow cinnamon after curing is cut into the sheet that size is 4cm * 6cm;
Step 2, adds water by the leaf of Yellow cinnamon sheet of step 1 gained and soaks at normal temperatures 2 hours～5 hours, add water and leaf of Yellow cinnamon sheet mass ratio be 2:1～8:1;
Step 3, adopts steam distillation to distill step 2 gained leaf of Yellow cinnamon sheet, and distillation temperature is 50 ℃～80 ℃, and distillation time is 2～3 hours, removes the impurity distilling out;
Step 4, the leaf of Yellow cinnamon sheet that wet distillation was extracted is collected, and after being again dried, with ethanol, as entrainment agent, mixes with dried leaf of Yellow cinnamon sheet, obtains material solution, and the mass ratio of ethanol used and leaf of Yellow cinnamon sheet is 1:20～1:50;
Step 5, imports step 4 gained material solution in extraction kettle, in extraction kettle, inputs supercritical carbon dioxide fluid, in extracting pressure, is that 10MPa～50MPa, extraction temperature are to extract at 30 ℃～80 ℃, and extraction time is 1h～5h;
Step 6, the supercritical carbon dioxide fluid that is dissolved with extract enters rectifying column separation through reducing valve, and rectifying column pressure is 8MPa～30MPa, and temperature is 20 ℃～65 ℃, the rectifying time is 0.5h～4h, and the wax component that solubleness is less and fatty oil are separated out in rectifying column bottom;
Step 7, it is separated that the larger leaf of Yellow cinnamon essential oil of solubleness and ethanol enter in separator through reducing valve with CO 2 fluid, and separating pressure is 10MPa～25MPa, and separation temperature is 20 ℃～65 ℃, and disengaging time is 0.5h～4h.
2. the extracting method of leaf of Yellow cinnamon essential oil according to claim 1, is characterized in that, the mass ratio that adds water and leaf of Yellow cinnamon sheet in step 2 is 3:1～6:1.
3. the extracting method of leaf of Yellow cinnamon essential oil according to claim 1, is characterized in that, in step 3, the distillation temperature of steam distillation is 60 ℃～70 ℃.
4. the extracting method of leaf of Yellow cinnamon essential oil according to claim 1, is characterized in that, in step 4, the mass ratio of ethanol used and leaf of Yellow cinnamon sheet is 1:30～1:40.
5. the extracting method of leaf of Yellow cinnamon essential oil according to claim 1, is characterized in that, in step 5, extracting pressure is that 20MPa～40MPa, extraction temperature are 40 ℃～70 ℃.
6. the extracting method of leaf of Yellow cinnamon essential oil according to claim 1, is characterized in that, in step 6, rectifying column pressure is 12MPa～25MPa, and temperature is 30 ℃～55 ℃.
7. the extracting method of leaf of Yellow cinnamon essential oil according to claim 1, is characterized in that, in step 7, separating pressure is 12MPa～20MPa, and separation temperature is 30 ℃～55 ℃.
8. the extracting method of leaf of Yellow cinnamon essential oil according to claim 1, is characterized in that, comprises the following steps:
Step 1, cures leaf of Yellow cinnamon to be dried to water content 4%, then with scissors, the leaf of Yellow cinnamon after curing is cut into the sheet that size is 4cm * 6cm;
Step 2, adds water by the leaf of Yellow cinnamon sheet of step 1 gained and soaks at normal temperatures 3.2 hours, add water and leaf of Yellow cinnamon sheet mass ratio be 4:1;
Step 3, adopts steam distillation to distill step 2 gained leaf of Yellow cinnamon sheet, and distillation temperature is 65 ℃, and distillation time is 2.5 hours, removes the impurity distilling out;
Step 4, the leaf of Yellow cinnamon sheet that wet distillation was extracted is collected, and after being again dried, with ethanol, as entrainment agent, mixes with dried leaf of Yellow cinnamon sheet, obtains material solution, and the mass ratio of ethanol used and leaf of Yellow cinnamon sheet is 1:35;
Step 5, imports step 4 gained material solution in extraction kettle, in extraction kettle, inputs supercritical carbon dioxide fluid, in extracting pressure, is that 22MPa, extraction temperature are to extract at 65 ℃, and extraction time is 2.5h;
Step 6, the supercritical carbon dioxide fluid that is dissolved with extract enters rectifying column separation through reducing valve, and rectifying column pressure is 24MPa, and temperature is 40 ℃, and the rectifying time is 2.3h, the wax component that solubleness is less and fatty oil are separated out in rectifying column bottom;
Step 7, it is separated that the larger leaf of Yellow cinnamon essential oil of solubleness and ethanol enter in separator through reducing valve with CO 2 fluid, and separating pressure is 13MPa, and separation temperature is 33 ℃, and disengaging time is 2.5h.
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