CN106753793B - Preparation method of tea absolute for cigarettes - Google Patents
Preparation method of tea absolute for cigarettes Download PDFInfo
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- CN106753793B CN106753793B CN201610993732.4A CN201610993732A CN106753793B CN 106753793 B CN106753793 B CN 106753793B CN 201610993732 A CN201610993732 A CN 201610993732A CN 106753793 B CN106753793 B CN 106753793B
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- 235000019504 cigarettes Nutrition 0.000 title claims abstract description 38
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 241001122767 Theaceae Species 0.000 title abstract 7
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims abstract description 153
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 35
- 238000000605 extraction Methods 0.000 claims abstract description 15
- 239000012528 membrane Substances 0.000 claims abstract description 15
- 238000001556 precipitation Methods 0.000 claims abstract description 10
- 238000001914 filtration Methods 0.000 claims abstract description 9
- 239000000919 ceramic Substances 0.000 claims abstract description 8
- 244000269722 Thea sinensis Species 0.000 claims description 66
- 235000013616 tea Nutrition 0.000 claims description 60
- 239000000243 solution Substances 0.000 claims description 50
- 239000002994 raw material Substances 0.000 claims description 18
- 239000000284 extract Substances 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 239000007864 aqueous solution Substances 0.000 claims description 7
- 239000000706 filtrate Substances 0.000 claims description 7
- 235000009569 green tea Nutrition 0.000 claims description 7
- 238000000622 liquid--liquid extraction Methods 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 7
- 238000010298 pulverizing process Methods 0.000 claims description 7
- 238000000638 solvent extraction Methods 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 9
- 239000003205 fragrance Substances 0.000 abstract description 8
- 206010013911 Dysgeusia Diseases 0.000 abstract description 6
- 210000000214 mouth Anatomy 0.000 abstract description 3
- 229940092665 tea leaf extract Drugs 0.000 abstract 2
- 241000208125 Nicotiana Species 0.000 description 7
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 7
- 238000004821 distillation Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 239000000779 smoke Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 3
- 230000000391 smoking effect Effects 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 230000007794 irritation Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 241000209507 Camellia Species 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 235000019568 aromas Nutrition 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 230000003544 deproteinization Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000035622 drinking Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000000796 flavoring agent Substances 0.000 description 1
- 235000019634 flavors Nutrition 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 238000004128 high performance liquid chromatography Methods 0.000 description 1
- 239000003906 humectant Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000001256 steam distillation Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
- C11B9/00—Essential oils; Perfumes
- C11B9/02—Recovery or refining of essential oils from raw materials
- C11B9/025—Recovery by solvent extraction
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
- A24B15/18—Treatment of tobacco products or tobacco substitutes
- A24B15/24—Treatment of tobacco products or tobacco substitutes by extraction; Tobacco extracts
- A24B15/241—Extraction of specific substances
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
- A24B15/18—Treatment of tobacco products or tobacco substitutes
- A24B15/24—Treatment of tobacco products or tobacco substitutes by extraction; Tobacco extracts
- A24B15/26—Use of organic solvents for extraction
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B3/00—Preparing tobacco in the factory
- A24B3/12—Steaming, curing, or flavouring tobacco
-
- C—CHEMISTRY; METALLURGY
- C11—ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
- C11B—PRODUCING, e.g. BY PRESSING RAW MATERIALS OR BY EXTRACTION FROM WASTE MATERIALS, REFINING OR PRESERVING FATS, FATTY SUBSTANCES, e.g. LANOLIN, FATTY OILS OR WAXES; ESSENTIAL OILS; PERFUMES
- C11B9/00—Essential oils; Perfumes
- C11B9/02—Recovery or refining of essential oils from raw materials
- C11B9/027—Recovery of volatiles by distillation or stripping
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Tea And Coffee (AREA)
- Fats And Perfumes (AREA)
- Medicines Containing Plant Substances (AREA)
- Extraction Or Liquid Replacement (AREA)
Abstract
The invention provides a preparation method of tea absolute oil for cigarettes, which comprises the following steps: (1) crushing tea leaves to 10-20 meshes, (2) adding an ethanol solution for dynamic countercurrent extraction, (3) concentrating the extracting solution under reduced pressure to obtain a tea leaf concentrated solution, (4) extracting the tea leaf concentrated solution for multiple times by using ethyl acetate, collecting an ethyl acetate phase, concentrating under reduced pressure to obtain a tea leaf extract, (5) adding ethanol into the tea leaf extract, carrying out alcohol precipitation to obtain an alcohol precipitation solution, and (6) filtering the alcohol precipitation solution by using a ceramic membrane, and concentrating under reduced pressure to obtain the tea leaf absolute oil. The method provided by the invention is simple and efficient, energy-saving and environment-friendly, and the prepared tea absolute oil has vivid and rich fragrance, can enrich the fragrance of cigarettes, improve the fragrance quality, improve the aftertaste of the oral cavity and endow the cigarettes with unique style characteristics when being added into the cigarettes.
Description
Technical Field
The invention relates to a preparation method of absolute oil for cigarettes, in particular to a preparation method of absolute oil of tea leaves for cigarettes.
Background
Tea leaves mainly come from bud leaves of camellia plant tea, and the tea leaves serving as a plant for medicine and food become indispensable living materials in daily life of people. China is also the earliest country for tea cultivation, preparation and drinking in the world. The research of tea aroma and components thereof has been carried out for nearly 100 years, and according to related literature reports, more than 600 kinds of volatile substances related to tea aroma are identified at present, although different tea varieties have different aroma types, the volatile substances have certain material bases, and the aroma characteristics of different tea varieties are formed just by the balance among various aromas and the difference of the proportions of various aroma components.
As known from the current literature data report, most of tea extracts are prepared by taking tea as a raw material, performing enzymolysis treatment, and then filtering and concentrating. The extract obtained by the method has insufficient fragrance, is not enough in the aspects of improving cigarette fragrance quality, improving oral aftertaste and endowing cigarette style characteristics with defects, and has the advantages of complex process, poor reproducibility and long production period.
A method for preparing tobacco essence and flavor by using tea leaves is also disclosed in the prior patent, for example, Z L201010282751.9 carries out steam distillation on tea leaf raw materials, and then carries out column adsorption treatment on distillate to obtain volatile aroma substances of the tea leaves, the method adopts a high-temperature distillation method, so that thermosensitive aroma components in the tea leaves are easily damaged, and the aroma characteristics of a final product are influenced, Z L201210181152.7 tea leaf raw materials are applied to a tobacco sheet after deproteinization treatment, the method still contains cellulose, colloid and other substances which bring certain negative influences on the smoking taste of the tobacco sheet, and the method adopts Z L201510472142.2 tea leaf raw materials which are extracted sequentially by petroleum ether, ethyl acetate and n-butyl alcohol, then is separated by a normal phase chromatography column and is prepared by high performance liquid chromatography, so that the tobacco humectant is finally obtained.
Disclosure of Invention
The invention overcomes the defects in the preparation technology, and provides the preparation method of the tea absolute oil for the cigarettes, which is simple, efficient, energy-saving and environment-friendly, has rich aroma of the tea absolute oil, and has ideal application effect in the cigarettes.
The technical scheme of the invention is as follows: a preparation method of tea absolute for cigarettes comprises the following steps:
(1) pulverizing folium Camelliae sinensis to 10-20 mesh, and making into folium Camelliae sinensis raw material.
(2) Adding 2-6 times of 10% -50% ethanol aqueous solution into the tea raw material treated in the step (1), performing dynamic countercurrent extraction for 2 times at 55-70 ℃ for 1-2h each time, and combining the two extracting solutions after extraction is finished.
(3) And carrying out reduced pressure concentration on the combined extracting solution at the temperature of 50-55 ℃ under the pressure of-0.090 MPa to-0.095 MPa to obtain the tea concentrated solution.
(4) Adding 0.8-1.2 times of ethyl acetate solution into the concentrated solution, mixing, performing liquid-liquid extraction, standing, and layering to obtain ethyl acetate phase.
(5) And (4) extracting the water phase treated in the step (4) for 3-6 times repeatedly, adding 0.2-0.5 times of ethyl acetate solution for each time, standing for layering, and collecting the ethyl acetate phase.
(6) And carrying out reduced pressure concentration on the combined ethyl acetate phase at-0.090 MPa to-0.095 MPa and at 30-35 ℃ until no ethyl acetate taste exists, and preparing the tea extract. The ethyl acetate obtained by concentration and distillation can be recycled.
(7) Adding 4-6 times of anhydrous ethanol into the folium Camelliae sinensis extract, stirring for 30min, and standing at 3-5 deg.C for 6-12 h.
(8) And (4) filtering the alcohol precipitation solution obtained in the step (7) by adopting a 100nm ceramic membrane, and concentrating the membrane filtrate under reduced pressure to obtain a semi-flowing paste, namely the tea leaf absolute oil for cigarettes.
Further, the relative density of the concentrated solution of the tea leaves in the step (3) is 1.055 +/-0.0080.
Further, the reduced pressure concentration in the step (8) is carried out under the following conditions: pressure: -0.090MPa to-0.095 MPa, and the temperature is 40 ℃ to 45 ℃.
The invention has the advantages that: the method is simple, efficient, energy-saving and environment-friendly, the prepared tea absolute oil has vivid and rich aroma, and when the tea absolute oil is added into cigarettes, the tobacco aroma can be enriched, the aroma quality can be improved, the aftertaste in the oral cavity can be improved, and the cigarettes are endowed with unique style characteristics.
Detailed Description
The present invention will be further described with reference to the following examples.
Example 1
A preparation method of tea absolute oil for cigarettes comprises the following specific steps:
(1) pulverizing folium Camelliae sinensis to 10 mesh, and making into folium Camelliae sinensis raw material.
(2) Adding 6 times of 20% ethanol aqueous solution into the tea raw material treated in the step (1), performing dynamic countercurrent extraction at 60 ℃ for 2 times, each time for 1h, and combining the two extracting solutions after the extraction is finished.
(3) Concentrating the combined extractive solutions under reduced pressure to relative density of 1.0580 at-0.093 MPa and 50 deg.C to obtain concentrated solution of folium Camelliae sinensis.
(4) Adding 0.8 times of ethyl acetate solution into the concentrated solution, mixing thoroughly, performing first liquid-liquid extraction, standing for layering to obtain ethyl acetate phase.
(5) And (4) extracting the water phase treated in the step (4) for 3 times, adding 0.4 weight time of ethyl acetate solution into the water phase each time, standing for layering, and collecting the ethyl acetate phase.
(6) Concentrating the combined ethyl acetate phase under reduced pressure at-0.095 MPa and 32 deg.C until no ethyl acetate smell, and making into tea extract. The ethyl acetate obtained by concentration and distillation can be recycled.
(7) Adding 6 times of anhydrous ethanol into the tea extract, stirring for 30min, and standing at 3 deg.C for 7 hr.
(8) And (4) filtering the alcohol precipitation solution obtained in the step (7) by adopting a 100nm ceramic membrane, and concentrating the membrane filtrate under reduced pressure to form a semi-flowing paste under the conditions of-0.090 MPa and 40 ℃, thus obtaining the tea absolute oil for cigarettes.
Example 2
A preparation method of tea absolute oil for cigarettes comprises the following specific steps:
(1) pulverizing tea leaves to 20 meshes, and preparing the tea leaf raw material for later use.
(2) Adding 5 times of 30% ethanol aqueous solution into the tea raw material treated in the step (1), performing dynamic countercurrent extraction for 2 times at 55 ℃, each time for 1.5h, and combining the two extracting solutions after the extraction is finished.
(3) Concentrating the combined extractive solution under reduced pressure at-0.095 MPa and 55 deg.C to relative density of 1.060 to obtain concentrated solution of folium Camelliae sinensis.
(4) Adding 1.2 times of ethyl acetate solution into the concentrated solution, mixing thoroughly, performing first liquid-liquid extraction, standing for layering to obtain ethyl acetate phase.
(5) And (4) extracting the water phase treated in the step (4) for 4 times, adding 0.3 weight time of ethyl acetate solution into the water phase each time, standing for layering, and collecting the ethyl acetate phase.
(6) Concentrating the combined ethyl acetate phase under reduced pressure at-0.092 MPa and 35 deg.C until no ethyl acetate smell, and making into tea extract. The ethyl acetate obtained by concentration and distillation can be recycled.
(7) Adding 4.5 times of anhydrous ethanol into the folium Camelliae sinensis extract, stirring for 30min, and standing at 4.2 deg.C for 9 h.
(8) And (4) filtering the alcohol precipitation solution obtained in the step (7) by adopting a 100nm ceramic membrane, and concentrating the membrane filtrate under reduced pressure to a semi-flowing paste state under the conditions of-0.094 MPa and 44 ℃, thus obtaining the tea absolute oil for cigarettes.
Example 3
A preparation method of tea absolute oil for cigarettes comprises the following specific steps:
(1) pulverizing tea leaves to 20 meshes, and preparing the tea leaf raw material for later use.
(2) Adding 2.5 times of 15% ethanol aqueous solution into the tea raw material treated in the step (1), performing dynamic countercurrent extraction at 60 ℃ for 2 times, each time for 1.5h, and combining the two extracting solutions after the extraction is finished.
(3) Concentrating the combined extractive solutions under reduced pressure to relative density of 1.0424 at-0.090 MPa and 52 deg.C to obtain concentrated solution of folium Camelliae sinensis.
(4) Adding 1.0 weight time of ethyl acetate solution into the concentrated solution, mixing thoroughly, performing first liquid-liquid extraction, standing for layering to obtain ethyl acetate phase.
(5) And (4) extracting the water phase treated in the step (4) for 6 times, adding 0.2 weight time of ethyl acetate solution into the water phase each time, standing for layering, and collecting the ethyl acetate phase.
(6) Concentrating the combined ethyl acetate phase under reduced pressure at-0.095 MPa and 30 deg.C until no ethyl acetate smell, and making into tea extract. The ethyl acetate obtained by concentration and distillation can be recycled.
(7) Adding 5.5 times of anhydrous ethanol into the folium Camelliae sinensis extract, stirring for 30min, and standing at 5 deg.C for 8 hr.
(8) And (4) filtering the alcohol precipitation solution obtained in the step (7) by adopting a 100nm ceramic membrane, and concentrating the membrane filtrate under reduced pressure to a semi-flowing paste state under the conditions of-0.095 MPa and 43 ℃, thus obtaining the tea absolute oil for cigarettes.
Example 4
A preparation method of tea absolute oil for cigarettes comprises the following specific steps:
(1) pulverizing folium Camelliae sinensis to 10 mesh, and making into folium Camelliae sinensis raw material.
(2) Adding 2 times of 25% ethanol aqueous solution into the tea raw material treated in the step (1), performing dynamic countercurrent extraction for 2 times at 65 ℃ for 2 hours each time, and combining the two extracting solutions after the extraction is finished.
(3) Concentrating the combined extractive solutions under reduced pressure to relative density of 1.0557 at-0.093 MPa and 54 deg.C to obtain concentrated solution of folium Camelliae sinensis.
(4) Adding 0.85 times of ethyl acetate solution into the concentrated solution, mixing, performing liquid-liquid extraction, standing, and layering to obtain ethyl acetate phase.
(5) And (4) extracting the water phase treated in the step (4) for 5 times, adding 0.35 weight time of ethyl acetate solution into the water phase each time, standing for layering, and collecting the ethyl acetate phase.
(6) Concentrating the combined ethyl acetate phase under reduced pressure at-0.092 MPa and 31 deg.C until no ethyl acetate smell, and making into tea extract. The ethyl acetate obtained by concentration and distillation can be recycled.
(7) Adding 4 times of anhydrous ethanol into the tea extract, stirring for 30min, and standing at 3.7 deg.C for 10 hr.
(8) And (4) filtering the alcohol precipitation solution obtained in the step (7) by adopting a 100nm ceramic membrane, and concentrating the membrane filtrate under reduced pressure to form a semi-flowing paste under the conditions of-0.090 MPa and 42 ℃, thus obtaining the tea absolute oil for cigarettes.
Example 5
A preparation method of tea absolute oil for cigarettes comprises the following specific steps:
(1) pulverizing folium Camelliae sinensis to 10 mesh, and making into folium Camelliae sinensis raw material.
(2) Adding 4.5 times of 10% ethanol aqueous solution into the tea raw material treated in the step (1), performing dynamic countercurrent extraction at 70 ℃ for 2 times, each time for 2 hours, and combining the two extracting solutions after the extraction is finished.
(3) Concentrating the combined extractive solutions under reduced pressure at-0.090 MPa and 55 deg.C to relative density of 1.0533 to obtain concentrated solution of folium Camelliae sinensis.
(4) Adding 0.9 times of ethyl acetate solution into the concentrated solution, mixing thoroughly, performing first liquid-liquid extraction, standing for layering to obtain ethyl acetate phase.
(5) And (4) extracting the water phase treated in the step (4) for 3 times, adding 0.5 weight time of ethyl acetate solution into the water phase each time, standing for layering, and collecting the ethyl acetate phase.
(6) Concentrating the combined ethyl acetate phase under reduced pressure at-0.095 MPa and 35 deg.C until no ethyl acetate smell, and making into tea extract. The ethyl acetate obtained by concentration and distillation can be recycled.
(7) Adding 5.2 times of anhydrous ethanol into the folium Camelliae sinensis extract, stirring for 30min, and standing at 3 deg.C for 11 h.
(8) And (4) filtering the alcohol precipitation solution obtained in the step (7) by adopting a 100nm ceramic membrane, and concentrating the membrane filtrate under reduced pressure to form a semi-flowing paste under the conditions of-0.090 MPa and 45 ℃, thus obtaining the tea absolute oil for cigarettes.
Effect smoking test for tobacco: the green tea absolute oil for cigarettes prepared in the five embodiments is respectively sprayed in tobacco shreds according to the adding proportion of 0.1 percent, and the cigarettes without the green tea absolute oil are rolled into cigarettes as reference products. And selecting 9 smoke evaluators for evaluation. The smoking result shows that the cigarette added with the green tea absolute has obvious aroma characteristics, can enrich the cigarette aroma, improve the aroma quality, improve the aftertaste of the oral cavity and endow the cigarette with unique style characteristics. The specific results of the smoke panel are shown in the following table:
green tea absolute oil smoke evaluation effect table for cigarettes
In the effect table, the better the aroma quality effect is, the higher the score is, and the full score is 18; the better the aroma quantity effect, the higher the score is, and the full score is 15; the better the smoke state is, the higher the score is, and the full score is 10; the less the miscellaneous gas, the higher the score, the full score of 12; the smaller the irritation, the higher the score, and the full score of 20; the more comfortable the aftertaste, the higher the score, 25 points full, and 100 points full.
The effect comparison table shows that the cigarette fragrance characteristics are obvious after five different kinds of prepared green tea absolute oil for cigarettes are added, the fragrance quality is improved, the fragrance amount is increased, miscellaneous gas and irritation are reduced, and the aftertaste is more comfortable.
The above description is only a detailed description of specific embodiments of the present invention, and should not be taken as limiting the invention, and any modifications, equivalents, improvements, etc. made on the design concept of the present invention should be included in the protection scope of the present invention.
Claims (2)
1. A preparation method of green tea absolute for cigarettes is characterized by comprising the following steps:
(1) pulverizing folium Camelliae sinensis to 10-20 mesh, and making into folium Camelliae sinensis raw material;
(2) adding 2-6 times of 10% -50% ethanol aqueous solution into the tea raw material treated in the step (1), performing dynamic countercurrent extraction for 2 times at 55-70 ℃ for 1-2h each time, and combining the two extracting solutions after the extraction is finished;
(3) concentrating the combined extracting solution under reduced pressure at the temperature of 50-55 ℃ and under the pressure of-0.090 MPa to-0.095 MPa to obtain a tea concentrated solution;
(4) adding 0.8-1.2 times of ethyl acetate solution into the concentrated solution, mixing thoroughly, performing first liquid-liquid extraction, standing for layering to obtain ethyl acetate phase;
(5) extracting the water phase treated in the step (4) for 3-6 times repeatedly, adding 0.2-0.5 times of ethyl acetate solution for each time, standing for layering, and collecting the ethyl acetate phase;
(6) concentrating the ethyl acetate phase combined in the step (4) and the step (5) under reduced pressure at-0.090 MPa to-0.095 MPa and at 30-35 ℃ until no ethyl acetate taste exists, and preparing a tea extract;
(7) adding 4-6 times of anhydrous ethanol into the tea extract, stirring for 30min, and standing at 3-5 deg.C for 6-12 hr;
(8) filtering the alcohol precipitation solution obtained in the step (7) by adopting a 100nm ceramic membrane, and concentrating the membrane filtrate under reduced pressure to obtain a semi-flowing paste, namely the tea absolute oil for cigarettes;
the reduced pressure concentration condition in the step (8) is as follows: pressure: -0.090MPa to-0.095 MPa, and the temperature is 40 ℃ to 45 ℃.
2. The preparation method of the green tea absolute oil for cigarettes according to claim 1, characterized in that: the relative density of the concentrated tea liquid in the step (3) is 1.055 +/-0.0080.
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| CN109181875B (en) * | 2018-09-20 | 2021-08-03 | 云南中烟工业有限责任公司 | Method for extracting and refining green tea absolute oil for flavoring tobacco |
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