CN104004593A - Extraction method of green tea essential oil - Google Patents
Extraction method of green tea essential oil Download PDFInfo
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- CN104004593A CN104004593A CN201410256273.2A CN201410256273A CN104004593A CN 104004593 A CN104004593 A CN 104004593A CN 201410256273 A CN201410256273 A CN 201410256273A CN 104004593 A CN104004593 A CN 104004593A
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Abstract
The invention relates to an extraction method of green tea essential oil. Complete set of distillation equipment is adopted. The extraction method comprises the following steps: a, adding cleaned fresh green tea leaves and water into a distillation kettle according to a weight ratio of 1:3; b, introducing steam generated by an electrical steam generator into the water for indirectly heating the fresh green tea leaves above a sieve plate, and after uniformly heating the fresh green tea leaves to 70-80 DEG C, directly heating and distilling the fresh green tea leaves through sieve holes of the sieve plate by the steam generated by the electrical steam generator; c, continuously distilling for 2.5-3 hours, controlling the distillation speed and the flow of cooling water, and finally controlling the quantity of discharged condensed liquid to be 1-2 times the weight of the fresh green tea leaves; d, separating the discharged condensed liquid through an oil-water separator to obtain the green tea essential oil. According to the method, a distillation process of indirectly heating and then directly heating is adopted, so that the oil yield of the green tea essential oil is the highest and the quality of the green tea essential oil is better; 4kg-5kg of green tea essential oil can be extracted from 100kg of fresh green tea leaves by adopting the method.
Description
Technical field:
The present invention relates to essential oil refining technique technical field, refer in particular to a kind of process for extracting of green tea essential oil.
Background technology:
Green tea, after various countries scholar studies, confirmation can suppress food preservatives nitrite and change carcinogenic substance at human body, experimental result in the Annual Research Report conference of Japanese radiation research association in 1991 is found, green tea can suppress microsome ferment system and carcinogenic effect, the carrying out that can stop oncogenic process, for benefiting of preventing cancer.In addition, green tea also has the effect of various health cares:
1, delaying retrogradation: " catechin " that green tea contains volume and oxidation-resistance VITAMIN (β-carotene, vitamin E and vitamin C), so have preventing cancer and avoid doing sth. in advance aging effect.And the antioxygenation of green tea is 20 times of vitamin E strong, can reduce the generation of active oxygen, effectively remove free radical, prevention geriatric disease is had to suitable help.
2, produce refreshing effect to the mind: although the caffeine in green tea is identical with the caffeine chemical constitution in coffee, but green tea is under peculiar catechin impact, the people who drinks green tea understands that spiritedness recovers gradually, endurance strengthens and all there reaction, but in green tea, the excitation meeting of caffeine slows down and lasting.
3, regulate physiological function: green tea helps and reduce fat, hypotensive, also can prevent and improve cardiovascular disorder in addition, suppress that blood sugar rises and the growth of pathogenic bacteria.
Green tea essential oil is the elite of extraction green tea to the useful composition of human body, has very high commodity economy and is worth.The extraction phase of these elite is when being difficult for, adopt traditional process for extracting, the green tea of 100 kilograms can only extract the essential oil of three kilograms, oil yield is lower, the composition that green tea mid-boiling point is high is difficult to extract, and the efficiency of refining is not high, and the time is long, some derived essential oils can occur to destroy the phenomenons such as decomposition, hydrolysis, polymerization under long-time hot environment, affect the quality of green tea essential oil.
Summary of the invention:
The object of the invention is to overcome the above-mentioned weak point of prior art, a kind of process for extracting of green tea essential oil is provided.
The technical scheme that the present invention realizes its object employing is: a kind of process for extracting of green tea essential oil, adopt the complete distillation plant that comprises electric energy steam producer, still kettle, condenser, cooling tank, water-and-oil separator, and this process for extracting comprises following steps:
A. by the fresh leaf of clean green tea and water by weight percentage 1:3 drop in still kettle, wherein the fresh leaf of green tea is positioned at the sieve plate top of still kettle, water level in still kettle bottom with the fresh leaf isolation of green tea;
B. the steam that electric energy steam producer produces first passes in water, indirectly to being positioned at the fresh leaf heating of green tea of sieve plate top, until the fresh leaf uniform temperature of green tea, rise to after 70 ℃～80 ℃, the steam that electric energy steam producer produces directly heats, distills the fresh leaf of green tea through the sieve aperture of sieve plate;
C. continue distillation 2.5h-3h, control distillation speed and be 8%～10% (the phlegma volume that is generation per hour be steamer volume 8%～10%) of steamer volume, control cooling water flow simultaneously, make to distill the condensate temperature that goes out front half an hour of fluid between 28 ℃～35 ℃, the condensate temperature going out after half an hour is between 40 ℃～45 ℃; The final phlegma liquid measure of controlling outflow is 1 times～2 times of the fresh leaf weight of green tea;
D. the phlegma flowing out is through water-and-oil separator, and separation obtains green tea essential oil.
In aforesaid method, the fresh leaf employing of described green tea 5 o'clock-7 o'clock in the morning, temperature, at 15-23 ℃, are plucked during relative humidity 55-70%, and in two hours, are cleaned immediately, refine.
In aforesaid method, while distilling, the dress leaf amount in the steamer of still kettle is 2/3 of steamer volume at every turn.
In aforesaid method, in described steps d, isolate the multiple fractional distillation column that remaining liq after green tea essential oil flows into still kettle again, under the effect of rising steam, heat and heat up in a steamer again.
In aforesaid method, the fresh leaf of the described green tea also green tea cured leaf of available wet treatment in advance replaces.
The fresh leaf of green tea that the selected oleaginousness of the present invention is high, adopts first indirect heating, rear direct-fired distillating method, coordinates sectional type condensate temperature to control, and makes the refinement oil yield of green tea essential oil reach the highest, green tea essential oil better quality; And distillating method open steam distillation temperature of the present invention is high, whole distillation speed is fast, can shorten distillation time, working (machining) efficiency is provided, avoid essential oil that the phenomenons such as decomposition, hydrolysis, polymerization at high temperature occur to destroy for a long time, and can steam high boiling point composition, further improve green tea essential oil quality.Adopt the inventive method to refine green tea essential oil, 100 kilograms of fresh leaves of green tea can extract 4～5 kilograms of green tea essential oils.
Embodiment:
Below in conjunction with specific embodiment, the present invention is further described.
Of the present invention is a kind of process for extracting of green tea essential oil, adopts the complete distillation plant that comprises electric energy steam producer, still kettle, condenser, cooling tank, water-and-oil separator, and these equipment all belong to prior art, therefore repeats no more.
This process for extracting comprises following steps:
A. by the fresh leaf of clean green tea and water by weight percentage 1:3 drop in still kettle, wherein the fresh leaf of green tea is positioned at the sieve plate top of still kettle, water level in still kettle bottom with the fresh leaf isolation of green tea; The fresh leaf employing of described green tea 5 o'clock-7 o'clock in the morning, temperature, at 15-23 ℃, are plucked during relative humidity 55-70%, and in two hours, are cleaned immediately, refine.Because the fresh and tender different oleaginousness of green tea are also different, now green tea oleaginousness is the highest, and composition is best.
During each distillation, the dress leaf amount in the steamer of still kettle is 2/3 of steamer volume, and now oil yield is the highest, too much or very fewly all can affect oil yield.
B. the steam that electric energy steam producer produces first passes in water, indirectly to being positioned at the fresh leaf heating of green tea of sieve plate top, until the fresh leaf uniform temperature of green tea, rise to after 70 ℃～80 ℃, the steam that electric energy steam producer produces directly heats, distills the fresh leaf of green tea through the sieve aperture of sieve plate; Direct heating after first indirect heating why, that kettle temperature is lower when initial, use open steam can increase undoubtedly a pot interior water yield, open steam makes a pot interior fresh flower stir fierceness simultaneously, the phenomenon of carrying leaf slag, the spittle secretly in the air-flow that can cause steaming, has a strong impact on the quality of phlegma and essential oil; Therefore, first indirect heating, makes to heat up slowly, makes leaf fully moistening by water, more suitably accelerates temperature-rise period, can improve oil yield like this, and to be difficult for be that derived essential oil is destroyed.
C. continue distillation 2.5h-3h, control distillation speed and be 8%～10% (the phlegma volume that is generation per hour be steamer volume 8%～10%) of steamer volume, control cooling water flow simultaneously, make to distill the condensate temperature that goes out front half an hour of fluid between 28 ℃～35 ℃, the condensate temperature going out after half an hour is between 40 ℃～45 ℃; The final phlegma liquid measure of controlling outflow is 1 times～2 times of the fresh leaf weight of green tea;
D. the phlegma flowing out is through water-and-oil separator, and separation obtains green tea essential oil.Isolate the multiple fractional distillation column that remaining liq after green tea essential oil flows into still kettle again, under the effect of rising steam, heat and heat up in a steamer again, so distill repeatedly, heat up in a steamer again, improve overall oil yield.
In aforesaid method, the fresh leaf of the described green tea also green tea cured leaf of available wet treatment in advance replaces.
In sum, the fresh leaf of green tea that the selected oleaginousness of the present invention is high, adopts first indirect heating, rear direct-fired distillating method, coordinates sectional type condensate temperature to control, and makes the refinement oil yield of green tea essential oil reach the highest, green tea essential oil better quality; And distillating method open steam distillation temperature of the present invention is high, whole distillation speed is fast, can shorten distillation time, working (machining) efficiency is provided, avoid essential oil that the phenomenons such as decomposition, hydrolysis, polymerization at high temperature occur to destroy for a long time, and can steam high boiling point composition, further improve green tea essential oil quality.Adopt the inventive method to refine green tea essential oil, 100 kilograms of fresh leaves of green tea can extract 4～5 kilograms of green tea essential oils.
Claims (5)
1. a process for extracting for green tea essential oil, adopts the complete distillation plant that comprises electric energy steam producer, still kettle, condenser, cooling tank, water-and-oil separator, it is characterized in that: this process for extracting comprises following steps:
A. by the fresh leaf of clean green tea and water by weight percentage 1:3 drop in still kettle, wherein the fresh leaf of green tea is positioned at the sieve plate top of still kettle, water level in still kettle bottom with the fresh leaf isolation of green tea;
B. the steam that electric energy steam producer produces first passes in water, indirectly to being positioned at the fresh leaf heating of green tea of sieve plate top, until the fresh leaf uniform temperature of green tea, rise to after 70 ℃～80 ℃, the steam that electric energy steam producer produces directly heats, distills the fresh leaf of green tea through the sieve aperture of sieve plate;
C. continue distillation 2.5h-3h, controlling distillation speed is 8%～10% of steamer volume, control cooling water flow simultaneously, make to distill the condensate temperature that goes out front half an hour of fluid between 28 ℃～35 ℃, the condensate temperature going out after half an hour is between 40 ℃～45 ℃; The final phlegma liquid measure of controlling outflow is 1 times～2 times of the fresh leaf weight of green tea;
D. the phlegma flowing out is through water-and-oil separator, and separation obtains green tea essential oil.
2. the process for extracting of green tea essential oil according to claim 1, is characterized in that: the fresh leaf employing of described green tea 5 o'clock-7 o'clock in the morning, temperature, at 15-23 ℃, are plucked during relative humidity 55-70%, and in two hours, cleaned immediately, refine.
3. the process for extracting of green tea essential oil according to claim 1, is characterized in that: while distilling, the dress leaf amount in the steamer of still kettle is 2/3 of steamer volume at every turn.
4. the process for extracting of green tea essential oil according to claim 1, is characterized in that: in described steps d, isolate the multiple fractional distillation column that remaining liq after green tea essential oil flows into still kettle again, under the effect of rising steam, heat and heat up in a steamer again.
5. the process for extracting of green tea essential oil according to claim 1, is characterized in that: the fresh leaf of the described green tea also green tea cured leaf of available wet treatment in advance replaces.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105559074A (en) * | 2016-02-03 | 2016-05-11 | 华南农业大学 | Application of tea volatile essential oil to preparation of anti-cancer health care product or anti-cancer drug |
| CN106906048A (en) * | 2017-03-29 | 2017-06-30 | 福州法莫优科机械科技有限公司 | Rosa Damascana extraction element and its application method |
| CN107699348A (en) * | 2016-08-08 | 2018-02-16 | 庞锦霞 | A kind of method of green tea essential oil extraction |
| CN109181875A (en) * | 2018-09-20 | 2019-01-11 | 云南中烟工业有限责任公司 | A kind of extracting and purifying method of the green tea absolute oil for tobacco flavoring |
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| CN101342017A (en) * | 2008-07-29 | 2009-01-14 | 红云烟草(集团)有限责任公司 | Green tea essential oil, preparation and application thereof |
| CN101343596A (en) * | 2008-07-29 | 2009-01-14 | 红云烟草(集团)有限责任公司 | Red tea oil, preparation and application thereof |
| CN102051265A (en) * | 2010-12-02 | 2011-05-11 | 天宁香料（江苏）有限公司 | Method for extracting active aroma component of natural plant through water and steam distillation |
| CN102984951A (en) * | 2010-06-21 | 2013-03-20 | 三得利控股株式会社 | Green tea extract |
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2014
- 2014-06-10 CN CN201410256273.2A patent/CN104004593A/en active Pending
Patent Citations (4)
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| CN101342017A (en) * | 2008-07-29 | 2009-01-14 | 红云烟草(集团)有限责任公司 | Green tea essential oil, preparation and application thereof |
| CN101343596A (en) * | 2008-07-29 | 2009-01-14 | 红云烟草(集团)有限责任公司 | Red tea oil, preparation and application thereof |
| CN102984951A (en) * | 2010-06-21 | 2013-03-20 | 三得利控股株式会社 | Green tea extract |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105559074A (en) * | 2016-02-03 | 2016-05-11 | 华南农业大学 | Application of tea volatile essential oil to preparation of anti-cancer health care product or anti-cancer drug |
| CN105559074B (en) * | 2016-02-03 | 2019-02-12 | 华南农业大学 | A kind of tealeaves volatile essential oil is preparing the application in cancer-preventing health product or anticancer drug |
| CN107699348A (en) * | 2016-08-08 | 2018-02-16 | 庞锦霞 | A kind of method of green tea essential oil extraction |
| CN106906048A (en) * | 2017-03-29 | 2017-06-30 | 福州法莫优科机械科技有限公司 | Rosa Damascana extraction element and its application method |
| CN106906048B (en) * | 2017-03-29 | 2023-03-17 | 福州法莫优科机械科技有限公司 | Rose essential oil extraction device and use method thereof |
| CN109181875A (en) * | 2018-09-20 | 2019-01-11 | 云南中烟工业有限责任公司 | A kind of extracting and purifying method of the green tea absolute oil for tobacco flavoring |
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Application publication date: 20140827 |