CN109007954A - A kind of method of supercritical fluid preparation tobacco extractive microcapsule - Google Patents

A kind of method of supercritical fluid preparation tobacco extractive microcapsule Download PDF

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Publication number
CN109007954A
CN109007954A CN201811057740.3A CN201811057740A CN109007954A CN 109007954 A CN109007954 A CN 109007954A CN 201811057740 A CN201811057740 A CN 201811057740A CN 109007954 A CN109007954 A CN 109007954A
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CN
China
Prior art keywords
tobacco
extract
wall material
supercritical fluid
microcapsule
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201811057740.3A
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Chinese (zh)
Inventor
云亮
楼海军
夏炎
徐晓炯
邬帅帆
李国斌
侯心刚
崔秀明
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Yingtan Huabao Flavours and Fragrances Co Ltd
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Yingtan Huabao Flavours and Fragrances Co Ltd
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Priority to CN201811057740.3A priority Critical patent/CN109007954A/en
Publication of CN109007954A publication Critical patent/CN109007954A/en
Pending legal-status Critical Current

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    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J13/00—Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
    • B01J13/02—Making microcapsules or microballoons
    • B01J13/04—Making microcapsules or microballoons by physical processes, e.g. drying, spraying
    • B01J13/043—Drying and spraying
    • 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

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Wood Science & Technology (AREA)
  • Dispersion Chemistry (AREA)
  • Manufacture Of Tobacco Products (AREA)

Abstract

The present invention relates to a kind of methods of supercritical fluid preparation tobacco extractive microcapsule, belong to technical field of tobacco.Preparation method of the invention includes the following steps: to carry out supercritical CO to tobacco leaf2Extraction；By in separating still extract and wall material solution send to the coaxial nozzle that spray drying top of tower is arranged in, in the exit of coaxial nozzle, tobacco extract in extract and wall material solution are emulsified, then spray and under, spray drying obtains tobacco extractive microcapsule.Operation of the present invention is easy, and preparation time is short, realizes from microcapsules preparation one step completion is extracted, significantly improves the stability of product, extend shelf life of products, can be widely used in each tobacco articles flavoring, promote the quality of perfumed products.

Description

A kind of method of supercritical fluid preparation tobacco extractive microcapsule
Technical field
The invention belongs to technical field of tobacco, and in particular to a kind of side of supercritical fluid preparation tobacco extractive microcapsule Method.
Background technique
With the whole world giving more sustained attention for cigarette consumption person's health, traditional cigarette living environment is increasingly serious, to meet Consumer demand, especially using Philip Morris as the global tobacco giant of representative early in the 1980s begin into The research of row new tobacco products, especially since 2014, as the heating of Fei Mo company is not burnt cigarette products iqos Publication, swept across world market at one stroke.And domestic also accelerate since 2015 does not burn cigarette products to heating Research work.
The heating cigarette that do not burn is to convey nicotine and tobacco characteristic perfume heating but not by way of burning tobacco, To reach the suction effect of traditional cigarette.Meanwhile the burst size of tar and harmful substance in main flume is also reduced, it is future The important trend of tobacco market development.But due to the difference of heating method, the heating cigarette that do not burn can not also be provided and is similar to The satisfactory amount of smoke of traditional cigarette and fragrance impression.
Application publication number provides one kind for the patent document of CN105919152 and heats tobacco-based bottom of not burning containing microcapsules Preparation method.The patent document prepares essential oil of tobaccos microcapsules using complex coacervation, improve tobacco-based bottom flavouring essence for tobacco and The additive amount of Alevaire ensure that the quality stability in product storing process, using the temperature sensitivity of microcapsules, in high temperature Under the conditions of, microcapsules be destroyed to improve to releasing aroma substance and nicotine etc. heating do not burn cigarette fragrance it is dense Degree and satisfaction.But the essential oil of tobaccos microcapsule preparation method that the patent uses, technique is cumbersome, and the operating time is long, and using multiple Coacervation cannot effectively wrap up the water soluble ingredients such as nicotine, so that the effective component of encapsulation is lacked.
Supercritical CO2Fluid extraction technology is to develop in recent ten years than relatively rapid extraction and separation technology, it has extraction Take ability strong, with short production cycle, high income, effective component is not easy the advantages that being destroyed.Especially for Nicotine in Tobacco and its His main aromatic components, in supercritical CO2There is good dissolubility energy in fluid.Meanwhile required operation temperature generally compared with It is low, the destruction and decomposition of effective component are avoided, is that one kind preferably obtains the preparation method of effective component in tobacco.
Summary of the invention
Technical problem to be solved by the present invention lies in view of the above shortcomings of the prior art, provide a kind of shooting flow The method of body preparation tobacco extractive microcapsule.Means of supercritical extraction and spray drying microcapsules preparation in preparation method of the invention It is carried out continuously, not only simplifies the preparation process of tobacco extractive microcapsule, while ensure that Nicotine in Tobacco and other perfume Taste ingredient can be more fully wrapped in wall material, obtained the microcapsule product rich in tobacco extract, reduced nicotine Loss and destruction.
In order to solve the above technical problems, the technical solution adopted by the present invention is that: a kind of supercritical fluid preparation tobacco extraction The method of object microcapsules, which is characterized in that this method has the feature that
A kind of method of supercritical fluid preparation tobacco extractive microcapsule, includes the following steps:
(1) by CO2It is continuously passed through in the extraction kettle for being placed with tobacco, in CO2Supercriticality under, extracted, and Extract is separated, supercritical CO2Extraction conditions are as follows: extraction temperature be 40~60 DEG C, extraction pressure be 15~ 35MPa, CO2Flow be 40~80L/h.
(2) extract in separating still is sent with wall material solution to the coaxial nozzle that spray drying top of tower is arranged in, The exit of coaxial nozzle, tobacco extract are mixed and are emulsified with wall material solution, then spray and under, heat drying is spraying dry Dry temperature is 80~120 DEG C, obtains the microcapsules of tobacco extract, the CO of release2Go out from spray drying tower top row, recycling compression After reuse.
The tobacco is flue-cured tobacco, Sun cured tobacco, one or more of burley tobaccos.
The wall material solution is the mixed aqueous solution of wall material and emulsifier, and the weight content of wall material is 25~40%, emulsification Agent weight content is 0.2%~0.8%.
The wall material be gum arabic, maltodextrin, converted starch, gelatin, sodium alginate, sodium carboxymethylcellulose, One of oligosaccharide is a variety of.
The emulsifier is monoglyceride, soybean protein isolate, tween, one of sucrose ester or a variety of.
The volumetric usage of the emulsifier is 20~40 times of extract.
The linear velocity of coaxial nozzle exit mixture is 0.3~0.8L/min.
Compared with prior art, the present invention having the advantage that
1, supercritical extraction technique and Micro-Encapsulation Technique spray drying process are carried out continuously by the present invention, simplify technique Process shortens preparation time, is effectively protected the loss of heat-sensitive materials and volatile substances, and product obtained reduces Tobacco extract is heating the loss for cigarette preparation process of not burning, while improving nicotine in content and stabilization wherein Property.
2, the present invention utilize microcapsules package and sustained release performance, using heating during, microcapsules be destroyed from And nicotine and other fragrance matters are released, the suction mouthfeel and satisfaction for heating the cigarette that do not burn are improved, tobacco is extracted The embedding rate of object can reach 50% or so.
Detailed description of the invention
Fig. 1 is the supercritical extract and spray drying Coupling device that the present invention carries out microcapsules preparation.
Description of symbols: 1.CO2Gas cylinder；2. control valve；3.CO2Cooler；4. supercritical CO2High-pressure pump；5.CO2Storage Tank；6.CO2Heater；7. extraction kettle；8. separating still；9. check valve；10. coaxial nozzle；11. drying tower；12. pressure pump；13. Fluid reservoir.
Specific embodiment
Below in conjunction with drawings and examples, the invention will be further described.
Embodiment 1
(1) 1000g burley tobaccos are fitted into extraction kettle, in CO2Supercriticality under, extracted, supercritical CO2's Extraction conditions are as follows: extraction temperature is 40 DEG C, and extraction pressure is 15MPa, CO2Flow be 40L/h.
(2) extract in separating still is delivered to the coaxial nozzle that spray drying top of tower is arranged in wall material solution, In the outlet of coaxial nozzle, tobacco extract and wall material solution mixing and emulsifying, then spray and under, heat drying obtains tobacco The microcapsules of extract.
In the wall material solution, the weight content of wall material is 25%, wherein gum arabic weight content is 10%, wheat Bud dextrin 5%, sodium alginate 5%, sodium carboxymethylcellulose 5%；The weight content of emulsifier is 0.2%, wherein monoglyceride 0.1%, tween 0.1%.
The volumetric usage of the emulsion is 20 times of extract.
The linear velocity of the mixture of the coaxial nozzle outlet is 0.3L/min.
The drying temperature of the mist spray is 80 DEG C.
Embodiment 2
(1) 1000g burley tobaccos are fitted into extraction kettle, in CO2Supercriticality under, extracted, supercritical CO2's Extraction conditions are as follows: extraction temperature is 45 DEG C, and extraction pressure is 20MPa, CO2Flow be 50L/h.
(2) extract in separating still is delivered to the coaxial nozzle that spray drying top of tower is arranged in wall material solution, In the outlet of coaxial nozzle, tobacco extract and wall material solution mixing and emulsifying, then spray and under, heat drying obtains tobacco The microcapsules of extract.
In the wall material solution, the weight content of wall material is 30%, wherein gum arabic weight content is 10%, wheat Bud dextrin 10%, sodium alginate 5%, sodium carboxymethylcellulose 5%；The weight content of emulsifier is 0.6%, wherein monoglyceride 0.2%, soybean protein isolate 0.2%, tween 0.2%.
The volumetric usage of the emulsion is 20 times of extract.
The linear velocity of the mixture of the coaxial nozzle outlet is 0.5L/min.
The drying temperature of the mist spray is 90 DEG C.
Embodiment 3
(1) 1000g burley tobaccos are fitted into extraction kettle, in CO2Supercriticality under, extracted, supercritical CO2's Reaction condition are as follows: extraction temperature is 50 DEG C, and extraction pressure is 25MPa, CO2Flow be 60L/h.
(2) extract in separating still is delivered to the coaxial nozzle that spray drying top of tower is arranged in wall material solution, In the outlet of coaxial nozzle, tobacco extract and wall material solution mixing and emulsifying, then spray and under, heat drying obtains tobacco The microcapsules of extract.
In the wall material solution, the weight content of wall material is 35%, wherein gum arabic weight content is 15%, wheat Bud dextrin 10%, sodium alginate 10%；The weight content of emulsifier is 0.6%, wherein monoglyceride 0.2%, soybean protein isolate 0.2%, tween 0.2%.
The volumetric usage of the emulsion is 30 times of extract.
The linear velocity of the mixture of the coaxial nozzle outlet is 0.4L/min.
The drying temperature of the mist spray is 100 DEG C.
Embodiment 4
(1) 1000g burley tobaccos are fitted into extraction kettle, in CO2Supercriticality under, extracted, supercritical CO2's Extraction conditions are as follows: extraction temperature is 60 DEG C, and extraction pressure is 35MPa, CO2Flow be 60L/h.
(2) extract in separating still is delivered to the coaxial nozzle that spray drying top of tower is arranged in wall material solution, In the outlet of coaxial nozzle, tobacco extract and wall material solution mixing and emulsifying, then spray and under, heat drying obtains tobacco The microcapsules of extract.
In the wall material solution, the weight content of wall material is 40%, wherein gum arabic weight content is 15%, wheat Bud dextrin 15%, sodium carboxymethylcellulose 10%；The weight content of emulsifier is 0.6%, wherein monoglyceride 0.2%, soybean point From albumen 0.2%, tween 0.2%.
The volumetric usage of the emulsion is 30 times of extract.
The linear velocity of the mixture of the coaxial nozzle outlet is 0.5L/min.
The drying temperature of the mist spray is 110 DEG C.
Embodiment 5
(1) 1000g burley tobaccos are fitted into extraction kettle, in CO2Supercriticality under, extracted, supercritical CO2's Reaction condition are as follows: extraction temperature is 60 DEG C, and extraction pressure drop is 35MPa, CO2Flow be 80L/h.
(2) extract in separating still is delivered to the coaxial nozzle that spray drying top of tower is arranged in wall material solution, In the outlet of coaxial nozzle, tobacco extract and wall material solution mixing and emulsifying, then spray and under, heat drying obtains tobacco The microcapsules of extract.
In the wall material solution, the weight content of wall material is 40%, wherein gum arabic weight content is 15%, wheat Bud dextrin 15%, sodium carboxymethylcellulose 10%；The weight content of emulsifier is 0.8%, wherein monoglyceride 0.3%, soybean point From albumen 0.2%, tween 0.3%.
The volumetric usage of the emulsion is 40 times of extract.
The linear velocity of the mixture of the coaxial nozzle outlet is 0.4L/min.
The drying temperature of the mist spray is 120 DEG C.
Embodiment 6
(1) 1000g Sun cured tobacco is fitted into extraction kettle, in CO2Supercriticality under, extracted, supercritical CO2's Extraction conditions are as follows: extraction temperature is 55 DEG C, and extraction pressure is 25MPa, CO2Flow be 55L/h.
(2) extract in separating still is delivered to the coaxial nozzle that spray drying top of tower is arranged in wall material solution, In the outlet of coaxial nozzle, tobacco extract and wall material solution mixing and emulsifying, then spray and under, heat drying obtains tobacco The microcapsules of extract.
In the wall material solution, the weight content of wall material is 40%, wherein gum arabic weight content is 15%, wheat Bud dextrin 15%, sodium carboxymethylcellulose 10%；The weight content of emulsifier is 0.6%, wherein monoglyceride 0.2%, soybean point From albumen 0.2%, tween 0.2%.
The volumetric usage of the emulsion is 30 times of extract.
The linear velocity of the mixture of the coaxial nozzle outlet is 0.8L/min.
The drying temperature of the mist spray is 110 DEG C.
Embodiment 7
(1) 1000g flue-cured tobacco is fitted into extraction kettle, in CO2Supercriticality under, extracted, supercritical CO2Extraction Take condition are as follows: extraction temperature is 40 DEG C, and extraction pressure is 35MPa, CO2Flow be 70L/h.
(2) extract in separating still is delivered to the coaxial nozzle that spray drying top of tower is arranged in wall material solution, In the outlet of coaxial nozzle, tobacco extract and wall material solution mixing and emulsifying, then spray and under, heat drying obtains tobacco The microcapsules of extract.
In the wall material solution, the weight content of wall material is 30%, wherein gum arabic weight content is 10%, wheat Bud dextrin 10%, sodium alginate 5%, sodium carboxymethylcellulose 5%；The weight content of emulsifier is 0.6%, wherein monoglyceride 0.2%, soybean protein isolate 0.2%, tween 0.2%.
The volumetric usage of the emulsion is 20 times of extract.
The linear velocity of the mixture of the coaxial nozzle outlet is 0.6L/min.
The drying temperature of the mist spray is 90 DEG C.
The direct embedding rate for calculating the tobacco extractive microcapsule of embodiment 1-7 preparation, is as a result listed in table 1.
The embedding rate of 1 embodiment 1-7 tobacco extractive microcapsule of table
Project Embodiment 1 Embodiment 2 Embodiment 3 Embodiment 4 Embodiment 5 Embodiment 6 Embodiment 7
Tobacco Burley tobaccos Burley tobaccos Burley tobaccos Burley tobaccos Burley tobaccos Sun cured tobacco Flue-cured tobacco
Embedding rate 30% 35% 45% 50% 46% 48% 49%
Embedding rate is the important indicator for investigating microcapsules quality, and the present invention utilizes supercritical fluid CO as can be seen from Table 12 The direct embedding rate of the tobacco extractive microcapsule of preparation can reach 50% or so, this is because the present invention is by supercritical extract skill Art and Micro-Encapsulation Technique spray drying process are carried out continuously, and easy to operate, preparation time is short, and temperature-sensitive object can be effectively protected The loss of matter and volatile substances, product obtained reduce tobacco extract in the damage for heating cigarette preparation process of not burning It loses, while improving nicotine in content and stability wherein.
Application test and conventional sample comparison are carried out to above-mentioned tobacco extractive microcapsule sample, it can be found that cigarette is added The heating of careless extract microcapsules cigarette the discharged flue gas fragrance level in aspiration procedure that do not burn is higher, and tobacco this perfume is more Prominent, the satisfaction of cigarette is more continual and steady, improves heat cigarette quality of not burning well, before having application well Scape.
The above embodiments are only used to illustrate the present invention, rather than limitation of the present invention.Although referring to embodiment to this hair It is bright to be described in detail, those skilled in the art should understand that, to technical solution of the present invention carry out it is various combination, Modification or equivalent replacement should all cover and want in right of the invention without departure from the spirit and scope of technical solution of the present invention It asks in range.

Claims (7)

1. a kind of method of supercritical fluid preparation tobacco extractive microcapsule, which comprises the steps of:
(1) by CO2 It is continuously passed through in the extraction kettle for being placed with tobacco, in CO2Supercriticality under, extracted, and Extract is separated, supercritical CO2Extraction conditions are as follows: extraction temperature be 40~60 DEG C, extraction pressure be 15~ 35MPa, CO2Flow be 40~80L/h；
(2) extract in separating still is sent with wall material solution to the coaxial nozzle that spray drying top of tower is arranged in, same The exit of axis nozzle, tobacco extract are mixed and are emulsified with wall material solution, then spray and under, heat drying, spray drying Temperature is 80~120 DEG C, obtains the microcapsules of tobacco extract, the CO of release2Go out from spray drying tower top row, recycling compression After reuse.
2. the method for supercritical fluid preparation tobacco extractive microcapsule according to claim 1, which is characterized in that described Tobacco is flue-cured tobacco, Sun cured tobacco, one or more of burley tobaccos.
3. the method for supercritical fluid preparation tobacco extractive microcapsule according to claim 1, which is characterized in that institute The mixed aqueous solution that wall material solution is wall material and emulsifier is stated, the weight content of wall material is 25 ~ 40%, and emulsifier weight content is 0.2%~0.8%。
4. the method for the preparation tobacco extractive microcapsule of the supercritical fluid according to claim 3, which is characterized in that institute Stating wall material is gum arabic, maltodextrin, converted starch, gelatin, sodium alginate, sodium carboxymethylcellulose, in oligosaccharide It is one or more.
5. the method for supercritical fluid preparation tobacco extractive microcapsule according to claim 3, which is characterized in that described Emulsifier is monoglyceride, soybean protein isolate, tween, one of sucrose ester or a variety of.
6. the method for supercritical fluid preparation tobacco extractive microcapsule according to claim 3, which is characterized in that described The volumetric usage of emulsifier is 20 ~ 40 times of extract.
7. the method for supercritical fluid preparation tobacco extractive microcapsule according to claim 1, which is characterized in that described The linear velocity of coaxial nozzle exit mixture is 0.3 ~ 0.8L/min.
CN201811057740.3A 2018-09-11 2018-09-11 A kind of method of supercritical fluid preparation tobacco extractive microcapsule Pending CN109007954A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109793271A (en) * 2019-01-30 2019-05-24 湖北中烟工业有限责任公司 Preparation method and application for the floral type in Novel heating not burning tobacco containing fragrant fibrofelt
CN110484367A (en) * 2019-08-27 2019-11-22 广东省金叶科技开发有限公司 A kind of preparation method of nicotine essence particle
CN114318880A (en) * 2020-10-10 2022-04-12 上海水星家用纺织品股份有限公司 Preparation method of microcapsule antibacterial home textile fabric
CN117844571A (en) * 2024-01-31 2024-04-09 茂名华美实业有限公司 Low-temperature supercritical multistage separation extract of malt for cigarettes and preparation method thereof

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CN104711120A (en) * 2015-03-31 2015-06-17 川渝中烟工业有限责任公司 Essential oil micro-capsule prepared by using tobacco wastes as well as preparation method and application thereof
CN105919152A (en) * 2016-04-20 2016-09-07 贵州中烟工业有限责任公司 Preparation method of tobacco substrate realizing non combustion after being heated and containing microcapsule
CN107177418A (en) * 2017-06-09 2017-09-19 云南中烟工业有限责任公司 A kind of full powder of tobacco extractive microcapsule without soluble sugar

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Publication number Priority date Publication date Assignee Title
CN1806672A (en) * 2005-12-20 2006-07-26 上海现代中医药技术发展有限公司 Method for preparing zanthoxylum oil microcapsule by coupled supercritical extraction and atomized drying
CN104711120A (en) * 2015-03-31 2015-06-17 川渝中烟工业有限责任公司 Essential oil micro-capsule prepared by using tobacco wastes as well as preparation method and application thereof
CN105919152A (en) * 2016-04-20 2016-09-07 贵州中烟工业有限责任公司 Preparation method of tobacco substrate realizing non combustion after being heated and containing microcapsule
CN107177418A (en) * 2017-06-09 2017-09-19 云南中烟工业有限责任公司 A kind of full powder of tobacco extractive microcapsule without soluble sugar

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109793271A (en) * 2019-01-30 2019-05-24 湖北中烟工业有限责任公司 Preparation method and application for the floral type in Novel heating not burning tobacco containing fragrant fibrofelt
CN109793271B (en) * 2019-01-30 2023-11-17 湖北中烟工业有限责任公司 Preparation method and application of flower-fragrance-type fragrant fiber mat used in novel heating non-combustible tobacco
CN110484367A (en) * 2019-08-27 2019-11-22 广东省金叶科技开发有限公司 A kind of preparation method of nicotine essence particle
CN114318880A (en) * 2020-10-10 2022-04-12 上海水星家用纺织品股份有限公司 Preparation method of microcapsule antibacterial home textile fabric
CN117844571A (en) * 2024-01-31 2024-04-09 茂名华美实业有限公司 Low-temperature supercritical multistage separation extract of malt for cigarettes and preparation method thereof

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