CN104289007A - Continuous phase change-based method for extracting tea polyphenol - Google Patents
Continuous phase change-based method for extracting tea polyphenol Download PDFInfo
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Abstract
The invention discloses a continuous phase change-based method for extracting tea polyphenol. The method comprises the steps of drying tea (including root, stems, leaves, flowers, fruits and the like) under 40-80 DEG C, wherein the content of moisture is controlled to 3-20 percent, crushing to powder of 20-80 meshes to obtain a tea powder material, feeding the tea powder material in an extraction kettle, compressing an extraction agent to a liquid extraction agent under the condition that the pressure and the temperature are lower than the critical pressure and the critical temperature of the extraction agent all the time, then continuously extracting the tea powder material in the extraction kettle for 50-120 minutes under the conditions that the extraction temperature is 50-70 DEG C and the extraction pressure is 0.3-2Mpa, and the liquid extraction agent can flow through the extraction kettle with the flow rate of 80-160L/h so as to obtain tea polyphenol, and enabling the extracted tea polyphenol to flow through a resolving kettle for resolving at 60-75 DEG C resolving temperature and 0.08-0.5Mpa resolving pressure. The method for preparing thw tea polyphenol has the high extraction rate of the tea polypheonl, and is safe, environmentally-friendly, low in cost and suitable for large-scale industrial production; the yield of the tea polyphenol prepared according to the method accounts for 10-35 percent of the yield of dry matters.
Description
Technical field
The present invention relates to a kind of extracting method of polyphenol, specifically, relate to the method for a kind of continuous phase transistion extraction Tea Polyphenols.
Background technology
China's tea yield enriches, and area and output all rank first in the world, the plantation of tealeaves and consume all very huge, but Tea Consumption is increasingly superior, low and middle-grade tea then often unsalable, excessive inventory, the development of this phenomenon restriction Tea Industry; In the process of manufacture of tealeaves, produce the thick tea of a large amount of low-qualitys and leftover bits and pieces simultaneously, processing and utilization is carried out with the added value of improving product to these low value products, being expected to the new growth engines becoming Tea Industry, is the study hotspot of Tea Science circle in recent years.The comprehensive utilization of tea for raw material, carries out comprehensive exploitation to its inclusion with tea (comprising root, stem, leaf, flower, fruit etc.), reaches and make the best use of everything, with additional income.
Tea Polyphenols is the general name of Catechin in Tea class, flavonoids, phenolic acid class and anthocyan compound, is the main chemical composition of tea Ye Zhongyi class, accounts for the 18-36% that tealeaves cured leaf is heavy, studies extensively the most deep in tealeaves biochemistry.In Tea Polyphenols each composition chemical constitution in multiple activity hydroxy, there is extremely strong antioxidation activity, very favourable to body-care, and have the multiple efficacies such as antibacterial, sterilization, antitumor, radioresistance; Its oxidation resistance be Prof. Du Yucang antioxidant BHT, BHA 4-6 doubly, be the 6-7 of VE doubly, doubly, and consumption is few for the 5-10 of VC: 0.01-0.03% can work, and without the potential toxic and side effect of synthetic.The utilization ways of Tea Polyphenols (mainly catechin) has multiple, studies at most to be the application of medicines and health protection and food additives.Medicines and health protection aspect, Tea Polyphenols particularly catechin-derived thing has the effect of inhibition cancer cell hyperplasia, anticancer, anti-sudden change.Food additives aspect, the high anti-oxidation of Tea Polyphenols is active, pure natural source and high security, determines its extensive use at field of food.Owing to having protective effect to the pigment in food and vitamins; food is made to keep original color and luster and trophic level in a long time; effectively can prevent the corruption of food, edible oils, and can eliminate peculiar smell, therefore Tea Polyphenols is the natural food antioxidant with very big Development volue.
The extracting method of Tea Polyphenols exist extract length consuming time, temperature is high, energy consumption is large, the problem such as the easy oxidation deterioration of Tea Polyphenols in leaching process.Current industrial extraction Tea Polyphenols solvent used is mainly water or certain density ethanol.Fu Jing etc. (pay Jing, Yue Tianli, Yuan Yahong, Wang Zhouli. the technical study of the ultrasonic extraction Tea Polyphenols of vacuum couplings. northwest agricultural college journal, 2013, vacuum technique and Ultrasonic Wave-Assisted Extraction 41(3): 172-178) is utilized to combine extraction Polyphenols of Tea, compared for normal reflux method, vacuumize-circumfluence method, ultrasonic method, the extraction effect of vacuum couplings ultrasonic method 4 kinds of extracting modes, result shows to vacuumize-circumfluence method, ultrasonic method, the recovery rate of vacuum couplings ultrasonic method 3 kinds of extracting modes all reaches more than 22%, wherein the extraction time of vacuum couplings ultrasonic method shortens 1/2.(the Xie Zongbo such as Xie Zongbo, Jiang Guofang, Liu Chengzuo, Li Haiying. the research of Extractive Condations of Tea-Polyphenols from Tea. print during chemical industry, 2005,19 (8): 28 – 30) with Ying Yuan county of Jiangxi Province cuckoo hainan holly leaf for raw material, determining optimum extraction condition by orthogonal test is: the lixiviate 3 times at 60 DEG C of 50% ethanol.Their research process finds, Tea Polyphenols leaching content flooding comparatively alcohol extract declines, and infer that reason causes content to decline because catechin in the aqueous solution there occurs oxidation reaction, and the existence of ethanol can suppress this oxidation to a certain extent.As can be seen here, different extracting technologies directly affects the content of Tea Polyphenols and the composition of catechin and content, especially the content height of EGCG.In recent years, adopt ultrasonic assistant leaching method to extract Tea Polyphenols also to receive publicity.Chen Xuhong (Chen Xuhong. safely and fast to the extraction of Tea Polyphenols in Tea and the mensuration of content. food research and development, 2004,25 (4): 135-137) with 80% ethanol for Extraction solvent, with ultrasonic-leaching method extract obtain Tea Polyphenols.(the Sun Qinglei such as Sun Qinglei, Liang Yuerong, Lu Jianliang, Deng. different leach extraction method is on the impact of millet paste quality. tealeaves, 2005,31 (2): 91-94) high temperature (90 DEG C), low temperature (50 DEG C) and ultrasonic wave (50 DEG C) three kinds of dry tea of distinct methods lixiviate are adopted, find that the EGCG recovery rate of ultrasonic wave 50 DEG C of assisted extraction is the highest, secondly, minimum be low temperature (50 DEG C) to high temperature (90 DEG C) recovery rate.In traditional handicraft, conventional hot water is as extraction solvent, along with the rising of temperature, is polymerized to xenol quinones substance after catechin oxidizable formation o-quinone Primary product, then oxidation generates Tea Pigment further, thus the leaching rate of Tea Polyphenols is reduced.Therefore be necessary to find new extracting method to overcome the problems referred to above.
Summary of the invention
Technical problem to be solved by this invention overcomes the deficiencies in the prior art, provides that a kind of recovery rate is high, safety, environmental protection, cost be low, be applicable to the method for the continuous phase transistion extraction Tea Polyphenols of large-scale industrial production.
For solving the problem, technical scheme provided by the invention is: a kind of method of continuous phase transistion extraction Tea Polyphenols, comprises the following steps:
(1) Feedstock treating: tealeaves or tea stalk, root, flower, fruit are dried at 40 DEG C ~ 80 DEG C temperature, moisture controls 3% ~ 20%, is crushed to 20 order ~ 80 orders, obtains tea powder raw material;
(2) continuous phase transistion extraction: described tea powder raw material is loaded in extraction kettle, all the time lower than under the critical pressure of extractant and the condition of critical-temperature, by extractant boil down to liquid, extraction temperature 50 DEG C ~ 70 DEG C, under the condition of extracting pressure 0.3Mpa ~ 2Mpa, extraction kettle is flowed through with the flow velocity of 80L/h ~ 160L/h, continuous extraction 50min ~ 120min, after extraction Tea Polyphenols, flow through in extraction-container, resolution temperature 60 DEG C ~ 75 DEG C, resolve pressure 0.08Mpa ~ 0.5Mpa, extractant is by heating, decompression becomes gas mutually, again by instant compression, become liquid and flow through extraction kettle again, material is extracted again, circulation like this repeatedly, finally collect Tea Polyphenols.
Above-mentioned method, in step (1), moisture controls 3% ~ 6%, and in step (2), described extractant is 70% ~ 95% ethanol water.
Described method, described extractant is 70% ethanol water, and extraction conditions is: extraction temperature 50 DEG C, extracting pressure 0.5Mpa, continuous extraction 60min, flow velocity 80L/h, resolution temperature 75 DEG C, resolves pressure 0.1Mpa; Or extraction conditions is: extraction temperature 60 DEG C, extracting pressure 0.6Mpa, continuous extraction 90min, flow velocity 80L/h, resolution temperature 75 DEG C, resolves pressure 0.2Mpa; Or extraction conditions is: extraction temperature 70 DEG C, extracting pressure 0.6Mpa, continuous extraction 60min, flow velocity 150L/h, resolution temperature 75 DEG C, resolves pressure 0.4Mpa.
Described method, described extractant is 80% ethanol water, and extraction conditions is: extraction temperature 50 DEG C, extracting pressure 0.5Mpa, continuous extraction 60min, flow velocity 150L/h, resolution temperature 75 DEG C, resolves pressure 0.1Mpa; Or extraction conditions is: extraction temperature 60 DEG C, extracting pressure 0.6Mpa, continuous extraction 60min, flow velocity 100L/h, resolution temperature 75 DEG C, resolves pressure 0.2Mpa; Or extraction conditions is: extraction temperature 70 DEG C, extracting pressure 0.6Mpa, continuous extraction 90min, flow velocity 150L/h, resolution temperature 75 DEG C, resolves pressure 0.4Mpa.
Described method, described extractant is 90% ethanol water, and extraction conditions is: extraction temperature 50 DEG C, extracting pressure 0.5Mpa, continuous extraction 90min, flow velocity 150L/h, resolution temperature 75 DEG C, resolves pressure 0.1Mp; Or extraction conditions is: extraction temperature 60 DEG C, extracting pressure 0.6Mpa, continuous extraction 60min, flow velocity 150L/h, resolution temperature 75 DEG C, resolves pressure 0.2Mpa; Or extraction conditions is: extraction temperature 70 DEG C, extracting pressure 0.6Mpa, continuous extraction 70min, flow velocity 150L/h, resolution temperature 75 DEG C, resolves pressure 0.4Mpa.
Described method, described extractant is 85% ethanol water, and extraction conditions is: extraction temperature 50 DEG C, extracting pressure 0.6Mpa, continuous extraction 80min, flow velocity 120L/h, resolution temperature 70 DEG C, resolves pressure 0.12Mp; Or extraction conditions is: extraction temperature 60 DEG C, extracting pressure 0.6Mpa, continuous extraction 90min, flow velocity 150L/h, resolution temperature 70 DEG C, resolves pressure 0.12Mpa; Or extraction conditions is: extraction temperature 60 DEG C, extracting pressure 0.6Mpa, continuous extraction 90min, flow velocity 160L/h, resolution temperature 70 DEG C, resolves pressure 0.12Mpa.
Described method, described extractant is 75% ethanol water, and extraction conditions is: extraction temperature 70 DEG C, extracting pressure 1.2Mpa, continuous extraction 60min, flow velocity 150L/h, resolution temperature 75 DEG C, resolves pressure 0.2Mp; Or extraction conditions is: extraction temperature 70 DEG C, extracting pressure 1.2Mpa, continuous extraction 90min, flow velocity 150L/h, resolution temperature 75 DEG C, resolves pressure 0.2Mpa; Or extraction conditions is: extraction temperature 70 DEG C, extracting pressure 1.2Mpa, continuous extraction 90min, flow velocity 120L/h, resolution temperature 75 DEG C, resolves pressure 0.2Mpa.
Described method, described extractant is 80% ethanol water, and extraction conditions is: extraction temperature 60 DEG C, extracting pressure 0.8Mpa, continuous extraction 70min, flow velocity 150L/h, resolution temperature 70 DEG C, resolves pressure 0.15Mpa; Or extraction conditions is: extraction temperature 50 DEG C, extracting pressure 0.8Mpa, continuous extraction 60min, flow velocity 120L/h, resolution temperature 70 DEG C, resolves pressure 0.5Mpa; Or extraction conditions is: extraction temperature 50 DEG C, extracting pressure 0.8Mpa, continuous extraction 60min, flow velocity 80L/h, resolution temperature 70 DEG C, resolves pressure 0.15 Mpa.
In the whole extraction process of the present invention, by liquid state, to gaseous state, liquid phase transition process is got back in condensation to extractant is again instant, continuous print, and extractant carries out continuous phase transistion, recycles, and the Tea Polyphenols of extraction is kept in extraction-container, extracted rear releasings collection.This method Tea Polyphenols yield reaches 10% ~ 35% of dry.The present invention compared with prior art has the following advantages:
(1) continuous phase transistion abstraction technique of the present invention extracts Tea Polyphenols, refer to that extractant is compressed into liquid under lower than its critical pressure and critical temperature condition, flow through after extraction kettle extracts material, gas is become mutually in extraction-container, the Tea Polyphenols composition be wherein extracted into brings extraction-container into, and the gas after parsing through being compressed into liquid, flows through extraction kettle more again, to the process that material extracts repeatedly, can continuous several times carry out dynamically, efficiently extracting to material.
(2) due to the present invention adopt china natural resources to enrich, tealeaves preparation after discarded object be raw material, therefore, significantly reduce production cost.
(3) the present invention adopts continuous phase transistion extraction and isolation technics, not only effectively reduce production cost, shorten extraction time, decrease consumption and the energy consumption of extractant in technical process, and technological process is simple, workable, extraction efficiency is high, environmental protection, pollution-free, completeness and reproducible, can realize heavy industrialization consecutive production.
(4) because the condition of whole extraction process at airtight anoxybiotic, low-temp low-pressure is carried out, therefore, be particularly suitable for oxidizable Tea Polyphenols industrialization continuity to produce.
(5) disposable process can realize extracting and refining, does not have pyroprocess, can reach higher quality Tea Polyphenols, easy to operate, safety, environmental protection.
(6) recovery rate of the present invention is high, and extractant can be recycled repeatedly.Compared with conventional method, tea polyphenol extract rate improves 5 ~ 10%, and once extract and can reach 70 ~ 95%, extraction time can shorten about 50%.
(7) ethanol water selecting grade-safe nontoxic is extractant, does not have hazardous solvent to remain.
(8) in the Tea Polyphenols of gained of the present invention, the content of EGCG is relatively high, and content can reach 30% ~ 50%, and quality is better.
Detailed description of the invention
Detailed description below by detailed description of the invention illustrates the present invention further, but is not limitation of the present invention, only does example explanation.
embodiment 1:
The method of the present invention one continuous phase transistion extraction Tea Polyphenols, comprises the following steps:
1. Feedstock treating: dried at 60 DEG C of temperature by tealeaves, moisture controls about 4%, is crushed to 20 order ~ 30 orders, obtains tea powder raw material.
2. above-mentioned tea powder 2kg is loaded extraction kettle, under the condition of extraction temperature 50 DEG C, extracting pressure 0.6Mpa, apply 85% ethanolic solution extraction 80min, flow velocity 120L/h, after extraction Tea Polyphenols, flow into extraction-container, resolution temperature is 70 DEG C, resolves pressure 0.12Mpa, obtains Tea Polyphenols alcoholic solution 0.99L, be concentrated into without alcohol, obtain the aqueous solution.Tea Polyphenols yield is 23.6%, and wherein EGCG content is 41.1%.
embodiment 2:
The method of the present invention one continuous phase transistion extraction Tea Polyphenols, comprises the following steps:
1. Feedstock treating: dried at 60 DEG C of temperature by tealeaves, moisture controls about 5%, is crushed to 40 order ~ 50 orders, obtains tea powder raw material.
2. above-mentioned tea powder 10kg is loaded extraction kettle, under the condition of extraction temperature 60 DEG C, extracting pressure 0.8Mpa, apply 80% ethanolic solution extraction 70min, flow velocity 150L/h, after extraction Tea Polyphenols, flow into extraction-container, resolution temperature is 70 DEG C, resolves pressure 0.15Mpa, obtains Tea Polyphenols alcoholic solution 4.35L, be concentrated into without alcohol, obtain the aqueous solution.Tea Polyphenols yield is 25.5%, and wherein EGCG content is 45.6%.
embodiment 3:
The method of a kind of continuous phase transistion extraction of the present invention Tea Polyphenols, comprises the following steps:
1. Feedstock treating: dried at 60 DEG C of temperature by tealeaves, moisture controls about 5%, is crushed to 60 order ~ 80 orders, obtains tea powder raw material.
2. above-mentioned tea powder 15kg is loaded extraction kettle, under the condition of extraction temperature 70 DEG C, extracting pressure 1.2Mpa, apply 75% ethanolic solution extraction 60min, flow velocity 150L/h, after extraction Tea Polyphenols, flow into extraction-container, resolution temperature is 75 DEG C, resolves pressure 0.2Mpa, obtains Tea Polyphenols alcoholic solution 7.02L, be concentrated into without alcohol, obtain the aqueous solution.Tea Polyphenols yield is 31.2%, and wherein EGCG content is 43.4%.
embodiment 4:
A method for continuous phase transistion extraction Tea Polyphenols, comprises the following steps:
1. Feedstock treating: dried at 40 DEG C of temperature by tealeaves, moisture controls 6%, is crushed to 20 order ~ 30 orders, obtains tea powder raw material.
2. above-mentioned tea powder 0.5kg is loaded extraction kettle, under the condition of extraction temperature 60 DEG C, extracting pressure 0.6Mpa, apply 85% ethanolic solution extraction 90min, flow velocity 150L, after extraction Tea Polyphenols, flow into extraction-container, resolution temperature is 70 DEG C, resolves pressure 0.12Mpa, obtains Tea Polyphenols alcoholic solution 0.32L, be concentrated into without alcohol, obtain the aqueous solution.Tea Polyphenols yield is 30.3%, and wherein EGCG content is 42.6%.
embodiment 5:
The method of a kind of continuous phase transistion extraction Tea Polyphenols of the present invention and microencapsulation protection thereof, comprises the following steps:
1. Feedstock treating: dried at 50 DEG C of temperature by tealeaves, moisture controls 6%, is crushed to 40 order ~ 50 orders, obtains tea powder raw material.
2. above-mentioned tea powder 5kg is loaded extraction kettle, under the condition of extraction temperature 50 DEG C, extracting pressure 0.8Mpa, apply 80% ethanolic solution extraction 60min, flow velocity 120L, after extraction Tea Polyphenols, flow into extraction-container, resolution temperature is 70 DEG C, resolves pressure 0.15Mpa, obtains Tea Polyphenols alcoholic solution 2.35L, be concentrated into without alcohol, obtain the aqueous solution.Tea Polyphenols yield is 24.7%, and wherein EGCG content is 42.3%.
embodiment 6:
The method of a kind of continuous phase transistion extraction of the present invention Tea Polyphenols, comprises the following steps:
1. Feedstock treating: dried at 70 DEG C of temperature by tealeaves, moisture controls 4%, is crushed to 60 order ~ 80 orders, obtains tea powder raw material.
2. above-mentioned tea powder 1kg is loaded extraction kettle, under the condition of extraction temperature 70 DEG C, extracting pressure 1.2Mpa, apply 75% ethanolic solution extraction 90min, flow velocity 150L, after extraction Tea Polyphenols, flow into extraction-container, resolution temperature is 75 DEG C, resolves pressure 0.2Mpa, obtains Tea Polyphenols alcoholic solution 0.52L, be concentrated into without alcohol, obtain the aqueous solution.Tea Polyphenols yield is 30.5%, and wherein EGCG content is 40.8%.
embodiment 7:
The method of a kind of continuous phase transistion extraction of the present invention Tea Polyphenols, comprises the following steps:
1. Feedstock treating: dried at 80 DEG C of temperature by tea stalk, moisture controls 3%, is crushed to 20 order ~ 30 orders, obtains tea powder raw material.
2. above-mentioned tea powder 0.5kg is loaded extraction kettle, under the condition of extraction temperature 60 DEG C, extracting pressure 0.6Mpa, apply 85% ethanolic solution extraction 90min, after flow velocity 160L extracts Tea Polyphenols, flow into extraction-container, resolution temperature is 70 DEG C, resolve pressure 0.12Mpa, obtain Tea Polyphenols alcoholic solution 0.36L, be concentrated into without alcohol, obtain the aqueous solution.Tea Polyphenols yield is 13.3%, and wherein EGCG content is 32.1%.
embodiment 8:
The method of a kind of continuous phase transistion extraction Tea Polyphenols of the present invention and microencapsulation protection thereof, comprises the following steps:
1. Feedstock treating: dried at 60 DEG C of temperature by tea stalk, moisture controls 5%, is crushed to 40 order ~ 50 orders, obtains tea powder raw material.
2. the tea powder 5kg after Feedstock treating is loaded extraction kettle, under the condition of extraction temperature 50 DEG C, extracting pressure 0.8Mpa, apply 80% ethanolic solution extraction 60min, flow velocity 80L, after extraction Tea Polyphenols, flow into extraction-container, resolution temperature is 70 DEG C, resolves pressure 0.15Mpa, obtains Tea Polyphenols alcoholic solution 2.35L, be concentrated into without alcohol, obtain the aqueous solution.Tea Polyphenols yield is 14.7%, and wherein EGCG content is 32.3%.
embodiment 9:
The method of a kind of continuous phase transistion extraction of the present invention Tea Polyphenols, comprises the following steps:
1. Feedstock treating: dried at 60 DEG C of temperature by tea stalk, moisture controls 4%, is crushed to 60 order ~ 80 orders, obtains tea powder raw material.
2. above-mentioned tea powder 1kg is loaded extraction kettle, under the condition of extraction temperature 70 DEG C, extracting pressure 1.2Mpa, apply 75% ethanolic solution extraction 90min, flow velocity 120L, after extraction Tea Polyphenols, flow into extraction-container, resolution temperature is 75 DEG C, resolves pressure 0.2Mpa, obtains Tea Polyphenols alcoholic solution 0.51L, be concentrated into without alcohol, obtain the aqueous solution.Tea Polyphenols yield is 16.5%, and wherein EGCG content is 35.8%.
Claims (8)
1. a method for continuous phase transistion extraction Tea Polyphenols, is characterized in that comprising the following steps:
(1) Feedstock treating: tealeaves or tea stalk, root, flower, fruit are dried at 40 DEG C ~ 80 DEG C temperature, moisture controls 3% ~ 20%, is crushed to 20 order ~ 80 orders, obtains tea powder raw material;
(2) continuous phase transistion extraction: described tea powder raw material is loaded in extraction kettle, all the time lower than under the critical pressure of extractant and the condition of critical-temperature, by extractant boil down to liquid, extraction temperature 50 DEG C ~ 70 DEG C, under the condition of extracting pressure 0.3Mpa ~ 2Mpa, extraction kettle is flowed through with the flow velocity of 80L/h ~ 160L/h, continuous extraction 50min ~ 120min, after extraction Tea Polyphenols, flow through in extraction-container, resolution temperature 60 DEG C ~ 75 DEG C, resolve pressure 0.08Mpa ~ 0.5Mpa, extractant is by heating, decompression becomes gas mutually, again by instant compression, become liquid and flow through extraction kettle again, material is extracted again, iterative cycles like this, finally collect Tea Polyphenols.
2. in accordance with the method for claim 1, it is characterized in that: in step (1), moisture controls 3% ~ 6%, in step (2), described extractant is 70% ~ 95% ethanol water.
3. in accordance with the method for claim 2, it is characterized in that: described extractant is 70% ethanol water, and extraction conditions is: extraction temperature 50 DEG C, extracting pressure 0.5Mpa, continuous extraction 60min, flow velocity 80L/h, resolution temperature 75 DEG C, resolve pressure 0.1Mpa; Or extraction conditions is: extraction temperature 60 DEG C, extracting pressure 0.6Mpa, continuous extraction 90min, flow velocity 80L/h, resolution temperature 75 DEG C, resolves pressure 0.2Mpa; Or extraction conditions is: extraction temperature 70 DEG C, extracting pressure 0.6Mpa, continuous extraction 60min, flow velocity 150L/h, resolution temperature 75 DEG C, resolves pressure 0.4Mpa.
4. in accordance with the method for claim 2, it is characterized in that: described extractant is 80% ethanol water, and extraction conditions is: extraction temperature 50 DEG C, extracting pressure 0.5Mpa, continuous extraction 60min, flow velocity 150L/h, resolution temperature 75 DEG C, resolve pressure 0.1Mpa; Or extraction conditions is: extraction temperature 60 DEG C, extracting pressure 0.6Mpa, continuous extraction 60min, flow velocity 100L/h, resolution temperature 75 DEG C, resolves pressure 0.2Mpa; Or extraction conditions is: extraction temperature 70 DEG C, extracting pressure 0.6Mpa, continuous extraction 90min, flow velocity 150L/h, resolution temperature 75 DEG C, resolves pressure 0.4Mpa.
5. in accordance with the method for claim 2, it is characterized in that: described extractant is 90% ethanol water, and extraction conditions is: extraction temperature 50 DEG C, extracting pressure 0.5Mpa, continuous extraction 90min, flow velocity 150L/h, resolution temperature 75 DEG C, resolve pressure 0.1Mp; Or extraction conditions is: extraction temperature 60 DEG C, extracting pressure 0.6Mpa, continuous extraction 60min, flow velocity 150L/h, resolution temperature 75 DEG C, resolves pressure 0.2Mpa; Or extraction conditions is: extraction temperature 70 DEG C, extracting pressure 0.6Mpa, continuous extraction 70min, flow velocity 150L/h, resolution temperature 75 DEG C, resolves pressure 0.4Mpa.
6. in accordance with the method for claim 2, it is characterized in that: described extractant is 85% ethanol water, and extraction conditions is: extraction temperature 50 DEG C, extracting pressure 0.6Mpa, continuous extraction 80min, flow velocity 120L/h, resolution temperature 70 DEG C, resolve pressure 0.12Mp; Or extraction conditions is: extraction temperature 60 DEG C, extracting pressure 0.6Mpa, continuous extraction 90min, flow velocity 150L/h, resolution temperature 70 DEG C, resolves pressure 0.12Mpa; Or extraction conditions is: extraction temperature 60 DEG C, extracting pressure 0.6Mpa, continuous extraction 90min, flow velocity 160L/h, resolution temperature 70 DEG C, resolves pressure 0.12Mpa.
7. in accordance with the method for claim 2, it is characterized in that: described extractant is 75% ethanol water, and extraction conditions is: extraction temperature 70 DEG C, extracting pressure 1.2Mpa, continuous extraction 60min, flow velocity 150L/h, resolution temperature 75 DEG C, resolve pressure 0.2Mp; Or extraction conditions is: extraction temperature 70 DEG C, extracting pressure 1.2Mpa, continuous extraction 90min, flow velocity 150L/h, resolution temperature 75 DEG C, resolves pressure 0.2Mpa; Or extraction conditions is: extraction temperature 70 DEG C, extracting pressure 1.2Mpa, continuous extraction 90min, flow velocity 120L/h, resolution temperature 75 DEG C, resolves pressure 0.2Mpa.
8. in accordance with the method for claim 2, it is characterized in that: described extractant is 80% ethanol water, and extraction conditions is: extraction temperature 60 DEG C, extracting pressure 0.8Mpa, continuous extraction 70min, flow velocity 150L/h, resolution temperature 70 DEG C, resolve pressure 0.15Mpa; Or extraction conditions is: extraction temperature 50 DEG C, extracting pressure 0.8Mpa, continuous extraction 60min, flow velocity 120L/h, resolution temperature 70 DEG C, resolves pressure 0.5Mpa; Or extraction conditions is: extraction temperature 50 DEG C, extracting pressure 0.8Mpa, continuous extraction 60min, flow velocity 80L/h, resolution temperature 70 DEG C, resolves pressure 0.15 Mpa.
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