CN111869769A - Production process of high-yield high-ester catechin green tea extract - Google Patents
Production process of high-yield high-ester catechin green tea extract Download PDFInfo
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- CN111869769A CN111869769A CN202010590090.XA CN202010590090A CN111869769A CN 111869769 A CN111869769 A CN 111869769A CN 202010590090 A CN202010590090 A CN 202010590090A CN 111869769 A CN111869769 A CN 111869769A
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- PFTAWBLQPZVEMU-DZGCQCFKSA-N (+)-catechin Chemical compound C1([C@H]2OC3=CC(O)=CC(O)=C3C[C@@H]2O)=CC=C(O)C(O)=C1 PFTAWBLQPZVEMU-DZGCQCFKSA-N 0.000 title claims abstract description 43
- ADRVNXBAWSRFAJ-UHFFFAOYSA-N catechin Natural products OC1Cc2cc(O)cc(O)c2OC1c3ccc(O)c(O)c3 ADRVNXBAWSRFAJ-UHFFFAOYSA-N 0.000 title claims abstract description 41
- 235000005487 catechin Nutrition 0.000 title claims abstract description 41
- 229950001002 cianidanol Drugs 0.000 title claims abstract description 41
- 229940094952 green tea extract Drugs 0.000 title claims abstract description 12
- 235000020688 green tea extract Nutrition 0.000 title claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- 238000000605 extraction Methods 0.000 claims abstract description 29
- 238000001914 filtration Methods 0.000 claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 150000002148 esters Chemical class 0.000 claims abstract description 21
- RYYVLZVUVIJVGH-UHFFFAOYSA-N caffeine Chemical compound CN1C(=O)N(C)C(=O)C2=C1N=CN2C RYYVLZVUVIJVGH-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000005406 washing Methods 0.000 claims abstract description 13
- 229960001948 caffeine Drugs 0.000 claims abstract description 8
- LPHGQDQBBGAPDZ-UHFFFAOYSA-N Isocaffeine Natural products CN1C(=O)N(C)C(=O)C2=C1N(C)C=N2 LPHGQDQBBGAPDZ-UHFFFAOYSA-N 0.000 claims abstract description 7
- VJEONQKOZGKCAK-UHFFFAOYSA-N caffeine Natural products CN1C(=O)N(C)C(=O)C2=C1C=CN2C VJEONQKOZGKCAK-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000001035 drying Methods 0.000 claims abstract description 6
- 238000010828 elution Methods 0.000 claims abstract description 5
- 238000001179 sorption measurement Methods 0.000 claims abstract description 5
- 238000002386 leaching Methods 0.000 claims description 32
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 24
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 18
- 244000269722 Thea sinensis Species 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 15
- 238000003825 pressing Methods 0.000 claims description 15
- 235000013616 tea Nutrition 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 12
- 230000008569 process Effects 0.000 claims description 12
- 238000000926 separation method Methods 0.000 claims description 10
- 238000001125 extrusion Methods 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 235000009569 green tea Nutrition 0.000 claims description 5
- 239000002994 raw material Substances 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 3
- 238000001694 spray drying Methods 0.000 claims description 3
- 229920001429 chelating resin Polymers 0.000 claims description 2
- 239000003480 eluent Substances 0.000 claims description 2
- 238000003809 water extraction Methods 0.000 claims 1
- 238000009776 industrial production Methods 0.000 abstract description 2
- 239000000047 product Substances 0.000 description 10
- 230000004071 biological effect Effects 0.000 description 6
- 150000008442 polyphenolic compounds Chemical class 0.000 description 6
- 235000013824 polyphenols Nutrition 0.000 description 6
- 238000011068 loading method Methods 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 235000013305 food Nutrition 0.000 description 3
- 229920000728 polyester Polymers 0.000 description 3
- 235000019640 taste Nutrition 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- 244000080767 Areca catechu Species 0.000 description 2
- 235000006226 Areca catechu Nutrition 0.000 description 2
- 235000019658 bitter taste Nutrition 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
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- 238000011160 research Methods 0.000 description 2
- 238000010561 standard procedure Methods 0.000 description 2
- WMBWREPUVVBILR-WIYYLYMNSA-N (-)-Epigallocatechin-3-o-gallate Chemical compound O([C@@H]1CC2=C(O)C=C(C=C2O[C@@H]1C=1C=C(O)C(O)=C(O)C=1)O)C(=O)C1=CC(O)=C(O)C(O)=C1 WMBWREPUVVBILR-WIYYLYMNSA-N 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- WMBWREPUVVBILR-UHFFFAOYSA-N GCG Natural products C=1C(O)=C(O)C(O)=CC=1C1OC2=CC(O)=CC(O)=C2CC1OC(=O)C1=CC(O)=C(O)C(O)=C1 WMBWREPUVVBILR-UHFFFAOYSA-N 0.000 description 1
- 206010028980 Neoplasm Diseases 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
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- 239000003963 antioxidant agent Substances 0.000 description 1
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- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000011161 development Methods 0.000 description 1
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- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
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- 239000012044 organic layer Substances 0.000 description 1
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- 238000007789 sealing Methods 0.000 description 1
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- 238000005507 spraying Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23F—COFFEE; TEA; THEIR SUBSTITUTES; MANUFACTURE, PREPARATION, OR INFUSION THEREOF
- A23F3/00—Tea; Tea substitutes; Preparations thereof
- A23F3/16—Tea extraction; Tea extracts; Treating tea extract; Making instant tea
- A23F3/163—Liquid or semi-liquid tea extract preparations, e.g. gels, liquid extracts in solid capsules
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23F—COFFEE; TEA; THEIR SUBSTITUTES; MANUFACTURE, PREPARATION, OR INFUSION THEREOF
- A23F3/00—Tea; Tea substitutes; Preparations thereof
- A23F3/16—Tea extraction; Tea extracts; Treating tea extract; Making instant tea
- A23F3/18—Extraction of water soluble tea constituents
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23F—COFFEE; TEA; THEIR SUBSTITUTES; MANUFACTURE, PREPARATION, OR INFUSION THEREOF
- A23F3/00—Tea; Tea substitutes; Preparations thereof
- A23F3/16—Tea extraction; Tea extracts; Treating tea extract; Making instant tea
- A23F3/22—Drying or concentrating tea extract
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23F—COFFEE; TEA; THEIR SUBSTITUTES; MANUFACTURE, PREPARATION, OR INFUSION THEREOF
- A23F3/00—Tea; Tea substitutes; Preparations thereof
- A23F3/16—Tea extraction; Tea extracts; Treating tea extract; Making instant tea
- A23F3/22—Drying or concentrating tea extract
- A23F3/28—Drying or concentrating tea extract by spraying into a gas stream
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D37/00—Processes of filtration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D37/00—Processes of filtration
- B01D37/04—Controlling the filtration
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Polymers & Plastics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Tea And Coffee (AREA)
Abstract
A production process of a high-yield and high-ester catechin green tea extract comprises the steps of extraction, re-extraction, filtration, adsorption, water washing, elution, concentration, extraction and drying, and the obtained extract finished product comprises the following steps: 60-65% of ester catechin and 20-25% of non-ester catechin, wherein the content of caffeine in the extract finished product is less than 1%. The product obtained by the invention contains about 60% of ester type catechin, 20% of non-ester type catechin, more than 85% of total catechin and less than 1% of caffeine, has the yield of more than 70%, is easy to realize industrial production and has good application prospect.
Description
Technical Field
The invention belongs to the technical field of food processing, and particularly relates to a production process of a high-yield and high-ester catechin green tea extract.
Background
The tea polyphenol in the green tea has health care and medical value, and the catechin in the tea polyphenol is a main bioactive component, has the functions of bacteriostasis, strong reducibility and antivirus, and has wide application value in the aspects of preventing decayed teeth, preventing cancers caused by cell oxidation, aging organisms, keeping freshness of animal and plant foods and protecting environment. The tea polyphenol is used as a natural antioxidant, the main components of the tea polyphenol are ester catechin and non-ester catechin, research shows that the ester catechin is high in biological activity, the non-ester catechin is low in biological activity, the former is only applied to medicines and health products due to the fact that the former is bitter and difficult to endure, and the taste is extremely poor, so that the development of the tea polyphenol in the food field is hindered, the latter is poor in biological activity, but has the advantage of no bitter taste, the tea polyphenol has a wider application prospect, and therefore the function of guaranteeing the taste and the biological activity of the extract is a new subject and a pursuit target in the field of tea industrialization research at present.
Chinese patent application No. CN201510090752.6 discloses a method for extracting tea polyester catechin. Mixing the crushed tea leaves with an acetone solution, carrying out oscillating extraction in a water bath, and concentrating the extract in vacuum to obtain the polyester catechin. The method is simple and feasible, but the purity of the obtained polyester catechin is too low, only 2-3%, and the yield is not high, 21-25%.
Chinese patent application No. CN201210165885.1 discloses a low-caffeine, non-bitter and high-content catechin product and a preparation method thereof. The method obtains a product with low caffeine, no bitter taste and high content of catechin through the steps of extraction, filtration, concentrated enzymolysis, extraction, decaffeination and the like, wherein the caffeine content is less than 1 percent; the total catechin content is 60% -65%. The process is relatively complex to operate and the total catechin content is not particularly high and is yet to be improved.
Disclosure of Invention
Aiming at the problems, the invention aims to provide a production process of a high-yield and high-ester catechin green tea extract, wherein the ester catechin in a finished product obtained by the process is about 60%, the non-ester catechin is about 20%, the total catechin is more than 85%, the caffeine is less than 1%, the yield of the product is as high as more than 70%, the industrial production is easy to realize, and the process has a good application prospect.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a production process of a high-yield and high-ester catechin green tea extract is characterized by comprising the steps of extraction, re-extraction, filtration, adsorption, water washing, elution, concentration, extraction and drying, and the obtained extract finished product comprises the following steps: 60-65% of ester catechin and 20-25% of non-ester catechin, wherein the content of caffeine in the extract finished product is less than 1%.
As a further preferred of the present invention, the production process comprises the steps of:
(1) extraction: crushing a green tea raw material, then leaching with hot water, and filtering to obtain a primary leaching solution and primary filter residue;
(2) and (3) re-extraction: extracting the primary filter residue with hot water, and filtering to obtain a secondary extract;
(3) and (3) filtering: mixing the primary leaching solution and the secondary leaching solution, and filtering to obtain a refined extraction solution;
(4) adsorption: adsorbing the refined extract by a separation column AMBERLITE XAD16HP at a flow rate of 1.0-3.0 BV/h;
(5) washing with water: washing the separation column with water at a flow rate of 2.0-5.0 BV/h;
(6) and (3) elution: resolving the separation column by using ethanol at the flow rate of 1.0-4.0 BV/h to obtain an eluent;
(7) concentration: concentrating the eluate in vacuum until extract is obtained to obtain an initial extract a;
(8) and (3) extraction: taking the primary extract a, adding ethyl acetate for extraction, and separating;
(9) and (3) drying: concentrating the separated ester layer under reduced pressure, and spray drying to obtain the final extract.
According to the further optimization of the invention, the hot water leaching temperature in the step (1) is 90-100 ℃, and the leaching time is 50-80 min; the hot water leaching temperature in the step (2) is 90-100 ℃, and the leaching time is 60-80 min.
As a further optimization of the invention, the amount of water used in the step (5) is 2-4 times of the volume of the separation column.
In a further preferable aspect of the present invention, the concentration of ethanol in step (6) is 70 to 85%, and the amount of ethanol used is 1 to 3 times the volume of the separation column.
In a further preferred embodiment of the present invention, the amount of ethyl acetate used in step (8) is 1 to 3 times of the volume of the primary extract a.
The invention also provides an integrated leaching and filtering device for leaching and filtering, which comprises a body and a containing device for placing tea leaves, wherein the body is respectively provided with a liquid inlet and a liquid outlet, and the containing device enters the body or is moved out of the body through a closed door arranged on the body; the body is internally provided with a lifting unit used for lifting the accommodating device and a compression unit used for extruding the accommodating device, wherein the lifting unit is positioned at the upper end of the accommodating device.
As a further preferred aspect of the present invention, the lifting unit includes a lifting plate and a control board, one end of the lifting plate is provided with a traction rope connected to the accommodating device, and the other end of the lifting plate is connected to the inner wall of the body through a torsion spring; one end of the control panel is connected with one end of the lifting plate for fixing the traction rope, and the other end of the control panel is connected with the inner wall of the body through a control piece.
As a further preferred aspect of the present invention, the compression unit includes two pressing plates fixed on the inner wall of the body, and the pressing plates are provided with pressing strips.
As a further preferred aspect of the present invention, the accommodating device includes an accommodating chamber formed by a fixing strip and a filter screen, and two squeezing chambers disposed at two ends of the accommodating chamber and corresponding to the two pressing plates one by one, and the single squeezing chamber is formed by a limiting plate and a connecting strip connecting the limiting plate and the fixing strip.
The invention has the following beneficial effects:
(1) the product obtained by the process has relatively high content of ester catechin, strong biological activity and moderate content of non-ester catechin, so that the final product not only ensures high biological activity, but also does not have poor taste, has high yield of more than 70 percent, has high utilization rate of tea leaves and has good process application prospect.
(2) The integrated leaching and filtering device provided by the invention can realize leaching and filtering in one device, the leaching time is controllable, the filtering effect is good, the loss of the leaching liquor is small, and the leaching and filtering efficiency in the process production is greatly improved.
Drawings
FIG. 1 is a schematic structural view of a leaching apparatus according to the present invention.
Fig. 2 is a schematic structural diagram of the accommodating device of the invention.
Description of the drawings: the device comprises a body 1, a liquid inlet 11, a liquid outlet 12, a sealing door 13, a containing device 2, a containing cavity 21, a fixing strip 211, an extrusion cavity 22, a limiting plate 221, a limiting groove 221a, a connecting strip 222, a lifting unit 3, a lifting plate 31, a traction rope 311, a torsion spring 312, a control plate 32, a control piece 321, a pressing block 322, a compression unit 4, a pressing plate 41, a pressing strip 411, a limiting block 412 and a roller 5.
Detailed Description
Example 1
Taking 200g of crushed green tea raw material, adding 2L of hot water, keeping the temperature at 100 ℃ for 1h for extraction, filtering, adding 1.6L of hot water into filter residue, keeping the temperature at 100 ℃ for extraction for one hour, filtering, and combining the two filtrates for later use; loading 200ml of macroporous resin AB-8 into a column, cleaning the resin with 50% ethanol, and then washing with a large amount of water until no alcohol smell exists for later use; taking 2.5L of the mixed feed liquid, performing column loading, controlling the flow rate to be 2BV/h, washing with 500ml of water after the column loading is finished, and then eluting with 1L of 80% ethanol; after the reaction is finished, concentrating the alcohol washing liquid into an extract, adding ethyl acetate for extraction, fully shaking, standing, layering, concentrating and drying an ester layer to obtain finished product dry powder, and detecting the content and the calculated yield of the components in the obtained finished product dry powder to obtain EGCG55%, total catechu 82%, ester type catechin 67% and the yield of 72%.
Example 2
Taking 200kg of crushed green tea raw material, adding 2000L of hot water, keeping the temperature at 100 ℃ for 1h for extraction, filtering, adding 1600L of hot water to filter residue, keeping the temperature at 100 ℃ for extraction for one hour, filtering, combining the two filtrates, and filtering with a plate frame for later use; loading macroporous resin AB-8 into a column, cleaning the resin with 50% ethanol, and washing with a large amount of water until no alcohol smell exists; taking the feed liquid obtained by passing through a plate frame, carrying out column feeding, controlling the flow rate to be 2BV/h, washing with a large amount of water after the column feeding is finished, and then eluting with 80% ethanol; after the reaction is finished, concentrating the alcohol washing liquid into an extract, adding three times of ethyl acetate for extraction, standing for 60 +/-20 min, and layering; concentrating the organic layer in a concentrator according to standard operation procedures of a double-effect concentrator, controlling the temperature to be less than 80 ℃ and the vacuum degree to be more than 0.06MPa, adding water for three times to remove solvent residues, wherein 10L of water is added each time, and the relative density of the extract is 1.06-1.10, which is a concentration end point; spraying according to standard operation procedure of spray dryer, controlling inlet air temperature at 195 + -5 deg.C and outlet air temperature at 95 + -5 deg.C, spray drying, collecting dry powder, detecting component content and calculating yield of the obtained dry powder to obtain EGCG content of 54%, total catechu content of 81%, ester catechin content of 65%, and yield of 71%.
The above examples verify that the preparation process adopted by the invention has high catechin content, good yield and good application prospect.
Example 3
As shown in the attached figure 1, an integrated leaching and filtering device comprises a body 1 and a containing device 2 for placing tea leaves, wherein the body 1 is provided with a liquid inlet 11 and a liquid outlet 12, and the containing device 2 enters the body 1 or moves out of the body 1 through a closed door 13 arranged on the body 1; the body 1 is provided with a lifting unit 3 for lifting the accommodating device 2 and a compressing unit 4 for compressing the accommodating device 2, wherein the lifting unit 3 is arranged at the upper end of the accommodating device 2. The lifting unit 3 comprises a lifting plate 31 with one end fixed on the inner wall of the body 1 through a torsion spring 312, a traction rope 311 is fixed on the lower side of the lifting plate 31 far away from the fixed end, and a hook or other fixing device (not shown in the figure) is arranged at the lower end of the traction rope 311 and can be used for fixing the accommodating device 2. A control plate 32 is additionally arranged for adjusting the lifting height of the lifting plate 31, one end of the control plate 32 is connected with the side wall of the body 1 through a control part 321, the lower surface of the other end of the control plate 32 is abutted against the lifting plate 31, and a pressing block 322 is arranged at the connection part of the control plate 32 and the lifting plate 31; in addition, an auxiliary roller 5 is disposed at the position of the traction rope 311 near the lifting plate 31 for guiding the traction rope 311, and the auxiliary roller 5 is fixed on the inner wall of the body 1. When the lifting unit 3 works, the control piece 321 is lifted by the control board 32 under the external control, the lifting board 31 drives the traction rope 311 to lift due to the existence of the torsion spring 312, the auxiliary roller plays a role in assisting the directional lifting and accommodating device 2, so that the control board can be separated from the leaching after the leaching is completed, and the leaching time is controllable. The control piece that adopts in this embodiment is the lift means that uses often, can include forms such as motor drive, manpower promotion, and this embodiment is no longer repeated.
As shown in fig. 2, the compressing unit 4 includes two pressing plates 41 located at two sides of the pulling rope 311 and fixed on the inner wall of the body 1, and a pressing strip 411 is disposed on the pressing plates 41. The holding device 2 is used for placing the tealeaves raw materials including holding chamber 21 that holding strip 211 and the filter screen 212 of installing on holding strip 211 constitute, respectively is provided with an extrusion chamber 22 in the both sides of holding chamber 21, and extrusion chamber 22 comprises a limiting plate 221 and connecting strip 222, and connecting strip 222 one end is connected with limiting plate 221, and the other end is connected with holding strip 211 set up spacing groove 221a on the limiting plate 221, with the stopper 412 adaptation of clamp plate 41 surface setting, when holding device 2 was promoted by the elevating unit 3, in the stopper 412 got into spacing groove 221a, layering 411 extrusion holding chamber 21 extrudees unnecessary leaching liquor out, has avoided the waste of leaching liquor.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (10)
1. A production process of a high-yield and high-ester catechin green tea extract is characterized by comprising the steps of extraction, re-extraction, filtration, adsorption, water washing, elution, concentration, extraction and drying, and the obtained extract finished product comprises the following steps: 60-65% of ester catechin and 20-25% of non-ester catechin, wherein the content of caffeine in the extract finished product is less than 1%.
2. The process for producing a high-yield high-ester catechin green tea extract as claimed in claim 1, wherein the process comprises the steps of:
(1) extraction: crushing a green tea raw material, then leaching with hot water, and filtering to obtain a primary leaching solution and primary filter residue;
(2) and (3) re-extraction: extracting the primary filter residue with hot water, and filtering to obtain a secondary extract;
(3) and (3) filtering: mixing the primary leaching solution and the secondary leaching solution, and filtering to obtain a refined extraction solution;
(4) adsorption: adsorbing the refined extract by a separation column AMBERLITE XAD16HP at a flow rate of 1.0-3.0 BV/h;
(5) washing with water: washing the separation column with water at a flow rate of 2.0-5.0 BV/h;
(6) and (3) elution: resolving the separation column by using ethanol at the flow rate of 1.0-4.0 BV/h to obtain an eluent;
(7) concentration: concentrating the eluate in vacuum until extract is obtained to obtain an initial extract a;
(8) and (3) extraction: taking the primary extract a, adding ethyl acetate for extraction, and separating;
(9) and (3) drying: concentrating the separated ester layer under reduced pressure, and spray drying to obtain the final extract.
3. The process for producing a high-yield high-ester catechin green tea extract as claimed in claim 2, wherein the hot water extraction temperature in step (1) is 90-100 ℃ and the extraction time is 50-80 min; the hot water leaching temperature in the step (2) is 90-100 ℃, and the leaching time is 60-80 min.
4. The process for producing a high-yield high-ester catechin green tea extract as claimed in claim 2, wherein the amount of water used in the step (5) is 2 to 4 times the volume of the separation column.
5. The process for producing a high-yield high-ester catechin green tea extract as claimed in claim 2, wherein the concentration of ethanol in step (6) is 70-85%, and the amount of ethanol is 1-3 times the volume of the separation column.
6. The process for producing a high-yield and high-ester catechin green tea extract as claimed in claim 2, wherein the amount of ethyl acetate used in the step (8) is 1 to 3 times of the volume of the primary extract a.
7. The production process provides an integrated leaching and filtering device based on claim 1, which is characterized by comprising a body (1) and a containing device (2) for placing tea leaves, wherein the body (1) is provided with a liquid inlet (11) and a liquid outlet (12), and the containing device (2) enters the body (1) or is removed from the body (1) through a closed door (13) arranged on the body (1); the lifting unit (3) used for lifting the accommodating device (2) and the compression unit (4) used for extruding the accommodating device (2) are arranged at the upper end of the accommodating device (2) in the body (1).
8. The integrated leaching and filtering device according to claim 7, wherein the lifting unit (3) comprises a lifting plate (31) and a control plate (32), one end of the lifting plate (31) is provided with a traction rope (311) connected with the containing device (2), and the other end of the lifting plate is connected with the inner wall of the body (1) through a torsion spring (312); one end of the control plate (32) is connected with one end of the lifting plate (31) for fixing the traction rope (311), and the other end of the control plate (32) is connected with the inner wall of the body (1) through a control piece (321).
9. The integrated leaching and filtering device according to claim 8, wherein the compression unit (4) comprises two pressing plates (41) fixed on the inner wall of the body (1), and the pressing plates (41) are provided with pressing strips (411).
10. The integrated leaching and filtering device according to claim 9, wherein the accommodating device (2) comprises an accommodating cavity (21) formed by a fixing strip (211) and a filter screen (212), and two extrusion cavities (22) arranged at two ends of the accommodating cavity (21) and corresponding to the two pressing plates (41), wherein each extrusion cavity (22) is formed by a limiting plate (221) and a connecting strip (222) connecting the limiting plate (221) and the fixing strip (211).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010590090.XA CN111869769A (en) | 2020-06-24 | 2020-06-24 | Production process of high-yield high-ester catechin green tea extract |
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| CN202010590090.XA CN111869769A (en) | 2020-06-24 | 2020-06-24 | Production process of high-yield high-ester catechin green tea extract |
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| CN111869769A true CN111869769A (en) | 2020-11-03 |
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| CN116019864A (en) * | 2022-12-21 | 2023-04-28 | 杭州天草科技有限公司 | Green tea extract with fat absorption inhibiting function, extraction method and application thereof |
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