CN104186808A - Tea leaf ingredient extracting process - Google Patents
Tea leaf ingredient extracting process Download PDFInfo
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- CN104186808A CN104186808A CN201410455342.2A CN201410455342A CN104186808A CN 104186808 A CN104186808 A CN 104186808A CN 201410455342 A CN201410455342 A CN 201410455342A CN 104186808 A CN104186808 A CN 104186808A
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Abstract
The invention discloses a tea leaf ingredient extracting process. The tea leaf ingredient extracting process comprises the steps of picking, spreading for airing, performing fixation through microwave, performing quick freezing and unfreezing a plurality of times in a circulating manner, crushing, performing supercritical extracting and the like. The tea leaf ingredient extracting process has the advantages that tea leaf cells are completely crushed, and thus soluble materials in tea leaves can be dissolved in extract effectively; active ingredients in the tea leaves can be extracted as much as possible by virtue of supercritical extraction, and therefore, the yield is increased and the cost is reduced.
Description
Technical field
The invention belongs to deep processing field of tea, relate in particular to a kind of tea component extraction process.
Background technology
The invention belongs to the project achievement in research at compbined test station, National modern agricultural industry technical system Danyang (CARS-23), project implementation people Wang Jinhe, Liu be suitable, have chrysanthemum rosy clouds.
In tealeaves, contain plurality of active ingredients, these compositions have multiple use in pharmaceutical chemistry, health care and other side.For example Tea Polyphenols has non-oxidizability, is conducive to healthyly, and caffeine is also widely used at field of medicaments.For the current Tea Polyphenols that focuses on of extraction of tea component, several different methods such as existing solvent method, macromolecular resin absorption.Yet the defect of prior art is, although the recovery rate of these compositions from leaching liquor improve constantly, yet along with the lifting of technology, reach capacity.In fact, although rare people pays close attention to the residual rate in tea raw material, the Improvement of this part is very high, and this makes the raw material with regard to Unit Weight, can obtain higher productive rate and promote, thereby reduce cost of material, obtains higher benefit.
Summary of the invention
Method of the present invention, by improving the percentage of damage of tealeaves cell, has improved the leaching rate of cell inclusion, thereby has improved the extraction efficiency of tea component, and adopts supercritical methanol technology to extract, and composition is easily separated, and DNA purity is high.
What specifically, the present invention adopted is following technical scheme:
A tea component extraction process, is characterized in that, described technique comprises the following steps:
A) pluck after fresh tea leaf in its, spread and dry, until hold, there is no wetness sensation;
B) utilize microwave irradiation to complete;
C) carry out subsequently quick-frozen, after complete adfreezing, use again microwave thawing, and then quick-frozen, so circulate one to three time;
D) the fresh leaf after thawing is pulverized in pulverizer, produced tea powder;
E) in supercritical extraction equipment, using supercritical carbon dioxide as extractant, 65% ethanol carries out extracting as entrainer;
F) reclaim extract, under reduced pressure centrifugal filtration, obtains extracted products.
Preferably, the pulverizing of tealeaves is taked is that ultrasonic wave is pulverized, thereby reduces tea powder to the adhering to of chamber wall, and is beneficial to the cleaning of container and the yield of tea powder.
Preferably, the pressure of supercritical extraction is 20-30Mpa, and extraction temperature is 45-55 ℃, and the consumption of entrainer is 3-5 times of tea grain weight amount.
Beneficial effect: by adopting method of the present invention, clasmatosis is abundant, cell inclusion recovery rate improves, and supercritical extraction can fully extract tealeaves inclusion, and product is easily separated.
The specific embodiment
The conventional beverage of Cha Shi China, although have different drinking way at different times, is all the mode that adopts bubble effective component extracting from water.In different tea, the content of various compositions is not quite similar, but kind is basic identical.Raising along with analytical technology in modern age, people have found multiple compounds from the extract of tealeaves, with main active component, are wherein comprise the multiple organic compound of tea polyphenolic compounds and caffeine and comprise phosphorus, potassium, sulphur, magnesium etc. in interior various trace elements.
Tea Polyphenols has multiple physiologically active, particularly antioxidation, can remove free radical, thereby plays effects such as regulating cardiovascular system, radioresistance.The medicine that contains Tea Polyphenols and health products have obtained increasing concern.
One of the rich content of caffeine in tealeaves, it has central nervous excitation effect, is pharmaceutically having been widely used, and can be used as heart and respiratory stimulant, or the composition of diuretics.
The extraction of these compositions generally all relates to the dry fragmentation of fresh tea leaf and lixiviate.The processing of fresh leaf is very crucial, contains natural polyphenol oxidase in tealeaves, and the destruction of cell can cause disengaging of polyphenol oxidase, thereby affects the yield and quality of Tea Polyphenols product, therefore before cytoclasis, needs the activity of first destructive enzyme.Thereby can how to make cytoclasis completely cell inclusion be discharged be completely a key that obtain high yield, wherein freeze thawing circulation is a good method.Freezingly make to form in cell crystallization, thereby and quick-frozen enough can avoid forming the structure and activity of active material in crystallization Cell protection.Quick-frozen is by ICW snap frozen is expanded, then thaws, and after circulation, eucaryotic cell structure destroyed completely for several times, intracellular micro-structural particularly, thus inclusion in cell is discharged completely.And the existing heating mode of completing makes fresh leaf dry, moisture reduces, and the effect of freeze thawing circulation can not get showing.Therefore need to guarantee that blade still contains a certain amount of moisture in freeze thawing circulation.
The method that the present invention extracts tea component is described below:
First pluck fresh tea leaf in its, airing a period of time, make the moisture drying on tealeaves surface.The existence of surface moisture can affect the operation of freeze thawing circulation, makes to form ice at blade surface.On the one hand this part to freeze be invalid, improved energy cost.On the other hand, this part water has formed protection to blade, is unfavorable for inner microwave de-enzyming.
After dry, under microwave, complete.Microwave energy acts on the moisture of fresh interlobar part, fresh interlobar part is heated up rapidly, thereby make protein denaturation inactivation, makes polyphenol oxidase enzyme deactivation, can retain like this activity of Tea Polyphenols after cytoclasis.The thickness that the time of microwave processing can spread according to tealeaves changes, and too shortly inside can not be heated to sufficient temp, can not make enzyme complete deactivation, and the oversize moisture that can make is again lost in a large number.For example, in the situation that tealeaves spreads thickness at 2-5 centimetre, the microwave of 2kw can be processed 10-15 minute.
Fresh leaf after microwave de-enzyming carries out quick-frozen, until every leaf is all used microwave thawing after adfreezing completely again, and then quick-frozen, so circulate one to three time.So, after circulation, leaf cells structure is destroyed, then the fresh leaf after thawing is pulverized in pulverizer, produces tea powder.The pulverizer of tea making powder can adopt the conventional pulverizer in this field, as long as can reach the result of pulverizing.But the consideration for post-processed and the raising tea powder rate of recovery, preferably adopts ultrasonic wave to pulverize.Although hyperacoustic crushing effect may not be fine, more abundant due to what eucaryotic cell structure has been destroyed above, thus be also acceptable, but hyperacoustic advantage is that other method institute is inaccessiable.
Utilize subsequently supercritical extraction equipment to carry out extracting.Supercritical extraction equipment has a large amount of finished products to sell on market, repeats no more here.The supercritical extract agent adopting is carbon dioxide, and entrainer is 65% ethanol.The pressure of extracting can adopt conventional pressure, preferably 20-30Mpa.Extraction temperature is 45-55 ℃, preferably 50 ℃ of left and right.The consumption of entrainer is 3-5 times of tea grain weight amount, and generally at 3-4 doubly, too high consumption can't make productive rate improve, but can expend more material and energy.
In conjunction with instantiation, embodiments of the present invention are described in detail above, but the invention is not restricted to above-mentioned embodiment, in the ken possessing at affiliated technical field those of ordinary skill, can also under the prerequisite that does not depart from aim of the present invention, make a variety of changes.
Claims (3)
1. a tea component extraction process, is characterized in that, described technique comprises the following steps:
A) pluck after fresh tea leaf in its, spread and dry, until hold, there is no wetness sensation;
B) utilize microwave irradiation to complete;
C) carry out subsequently quick-frozen, after complete adfreezing, use again microwave thawing, and then quick-frozen, so circulate one to three time;
D) the fresh leaf after thawing is pulverized in pulverizer, produced tea powder;
E) in supercritical extraction equipment, using supercritical carbon dioxide as extractant, 65% ethanol carries out extracting as entrainer;
F) reclaim extract, under reduced pressure centrifugal filtration, obtains extracted products.
2. the new technology of solvent extraction Tea Polyphenols as claimed in claim 1, is characterized in that, what the pulverizing of tealeaves was taked is that ultrasonic wave is pulverized.
3. the new technology of solvent extraction Tea Polyphenols as claimed in claim 1, is characterized in that, the pressure of supercritical extraction is 20-30Mpa, and extraction temperature is 45-55 ℃, and the consumption of entrainer is 3-5 times of tea grain weight amount.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410455342.2A CN104186808A (en) | 2014-09-10 | 2014-09-10 | Tea leaf ingredient extracting process |
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| CN201410455342.2A CN104186808A (en) | 2014-09-10 | 2014-09-10 | Tea leaf ingredient extracting process |
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| CN104186808A true CN104186808A (en) | 2014-12-10 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104663933A (en) * | 2015-02-17 | 2015-06-03 | 杭州艺福堂茶业有限公司 | Disposable tea processing technology |
| CN105995822A (en) * | 2016-06-01 | 2016-10-12 | 望江县碧春源蜂业有限责任公司 | Traditional Chinese medicine health-care blender prepared from green tea extract compounded with honey and preparation method of traditional Chinese medicine health-care blender |
| CN106478744A (en) * | 2016-08-26 | 2017-03-08 | 潜山县妙山茶业有限公司 | A kind of technique extracting tea polyphenols from Folium Camelliae sinensis |
| CN108576333A (en) * | 2018-06-27 | 2018-09-28 | 合肥市绿之林农业开发有限公司 | A kind of preparation method of the sunset abelmoschus root bud tea of natural in color |
| CN108813587A (en) * | 2018-05-28 | 2018-11-16 | 贵州湄潭兰馨茶业有限公司 | Tealeaves essential oil capsules |
| CN108948101A (en) * | 2018-06-26 | 2018-12-07 | 广西克鲁尼茶叶生物科技有限公司 | The method of ultrasonic supercritical combined extracting tea polyphenols |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104663933A (en) * | 2015-02-17 | 2015-06-03 | 杭州艺福堂茶业有限公司 | Disposable tea processing technology |
| CN105995822A (en) * | 2016-06-01 | 2016-10-12 | 望江县碧春源蜂业有限责任公司 | Traditional Chinese medicine health-care blender prepared from green tea extract compounded with honey and preparation method of traditional Chinese medicine health-care blender |
| CN106478744A (en) * | 2016-08-26 | 2017-03-08 | 潜山县妙山茶业有限公司 | A kind of technique extracting tea polyphenols from Folium Camelliae sinensis |
| CN108813587A (en) * | 2018-05-28 | 2018-11-16 | 贵州湄潭兰馨茶业有限公司 | Tealeaves essential oil capsules |
| CN108948101A (en) * | 2018-06-26 | 2018-12-07 | 广西克鲁尼茶叶生物科技有限公司 | The method of ultrasonic supercritical combined extracting tea polyphenols |
| CN108576333A (en) * | 2018-06-27 | 2018-09-28 | 合肥市绿之林农业开发有限公司 | A kind of preparation method of the sunset abelmoschus root bud tea of natural in color |
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Application publication date: 20141210 |