JPH07222553A - Method for degassing tea drink - Google Patents
Method for degassing tea drinkInfo
- Publication number
- JPH07222553A JPH07222553A JP3781394A JP3781394A JPH07222553A JP H07222553 A JPH07222553 A JP H07222553A JP 3781394 A JP3781394 A JP 3781394A JP 3781394 A JP3781394 A JP 3781394A JP H07222553 A JPH07222553 A JP H07222553A
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- JP
- Japan
- Prior art keywords
- tea
- phase
- gas
- inert gas
- liquid
- 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.)
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は茶飲料の脱気方法に係
り、さらに詳しくは、茶液に溶存している酸素等の溶解
気体を効果的に脱気することで褐変やレトルト臭の発生
を抑え、かつ、呈味の向上を図ることができる茶飲料の
脱気方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for deaeration of tea beverages, and more particularly to the generation of browning and retort odor by effectively degassing dissolved gases such as oxygen dissolved in tea liquor. The present invention relates to a method for deaerating a tea beverage, which can suppress the taste and improve the taste.
【０００２】[0002]
【従来の技術】緑茶の茶葉を飲用水で抽出して得られる
茶液中には、通常、酸素等の気体が溶存しており、これ
らの溶存気体中、特に溶存酸素については、その加工時
に例えば１２０°Ｃで７分間熱殺菌すると茶成分と反応
し、カテキンの酸化やビタミン類の分解や消失、さらに
は褐変など、酸化作用に起因する茶飲料にとっては好ま
しくない諸現象をもたらす不具合があった。2. Description of the Related Art In a tea liquor obtained by extracting tea leaves of green tea with drinking water, gases such as oxygen are usually dissolved, and these dissolved gases, especially dissolved oxygen, are not dissolved during processing. For example, when heat sterilized at 120 ° C for 7 minutes, it reacts with tea components and causes various phenomena such as oxidation of catechin, decomposition and disappearance of vitamins, and browning, which are not preferable for tea beverages due to oxidation. It was
【０００３】このような上記不都合を解消する手法とし
ては、大別すると加熱法のほか、減圧法、不活性ガス置
換法、酸化防止剤の使用という四種類の酸化防止法が従
来より提案されてきている。As a method for eliminating the above-mentioned inconveniences, there are roughly four types of antioxidant methods, which are a heating method, a decompression method, an inert gas substitution method, and the use of an antioxidant. ing.
【０００４】ところで、上記酸化防止法中の不活性ガス
置換法については、不活性ガスと茶液とを接触させて液
相中の溶解気体を気相中に分散させるようにした手法で
あり、茶液を濡壁塔の薄膜を流下させてガスを分散さ
せる方法、充填塔におけるカラム等の充填物の表面を
茶液で濡らしながらガスを分散させる方法、気泡を撹
拌槽中の茶液に直接に吹き込み、もしくはエジェクター
を用いて吹き込むことでガスを分散させる方法があり、
上記減圧法のひとつには、中空糸膜モジュールにおける
多孔質中空糸の外側を真空状態にしてガスを分散させる
方法がある。By the way, the inert gas replacement method in the above-mentioned antioxidant method is a method in which an inert gas and tea liquor are brought into contact with each other to dissolve the dissolved gas in the liquid phase in the gas phase, The method of dispersing tea gas by flowing down the thin film of the wetting wall tower, the method of dispersing gas while wetting the surface of the packing such as the column in the packing tower with the tea solution, the bubbles directly to the tea solution in the stirring tank There is a method to disperse the gas by blowing it into the air, or by using an ejector.
One of the above depressurization methods is a method in which the outside of the porous hollow fibers in the hollow fiber membrane module is vacuumed to disperse the gas.
【０００５】このうち、の濡壁塔方式やの充填塔方
式については、気液の接触面積を大きくとる必要がある
ために、装置が大型化してしまう不都合があり、の撹
拌方式もしくはエジェクター方式については、形成され
る気泡が比較的大きいが故に茶液中での気泡の滞留時間
が短かかったり、気液接触面積が小さくなるため、脱気
効率が劣るという不都合があった。Among these, the wet wall tower method and the packed tower method have the disadvantage that the apparatus becomes large in size because a large contact area of gas and liquid is required. However, since the bubbles formed are relatively large, the residence time of the bubbles in the tea liquor is short, and the gas-liquid contact area is small, resulting in inferior degassing efficiency.
【０００６】一方、減圧法のひとつである上記中空糸膜
モジュール方式については、多数本の中空糸をセット
し、その外側を真空状態にすることで中空糸内外に分圧
差を形成し、この分圧差を駆動力として中空糸内を流下
する茶液から溶存気体成分を除去するものであるため、
装置を小型化しながらも気液接触面積を大きくとること
ができ、この点での濡壁塔方式やの充填塔方式に比
較して優れたものとなっており、さらには、効率的に脱
気処理することができる点での撹拌方式もしくはエジ
ェクター方式に比較して優れたものとなっている。On the other hand, in the hollow fiber membrane module system, which is one of the depressurization methods, a large number of hollow fibers are set and the outside thereof is evacuated to form a partial pressure difference between the inside and outside of the hollow fibers. Since the dissolved gas component is removed from the tea liquor flowing down in the hollow fiber by using the pressure difference as a driving force,
It is possible to take a large gas-liquid contact area while downsizing the device, which is superior to the wet wall tower system and the packed tower system in this respect, and further, it is possible to degas efficiently. It is superior to the stirring system or ejector system in that it can be processed.
【０００７】[0007]
【発明が解決しようとする課題】ところで、減圧法のひ
とつである上記中空糸膜モジュール方式によっても、小
型化した装置を用いて効率的に溶存気体成分を茶液中か
ら除去することはできる。By the way, the above hollow fiber membrane module system, which is one of the depressurization methods, can also efficiently remove dissolved gas components from the tea liquor using a downsized device.
【０００８】しかし、上記従来手法は、真空減圧処理の
ため沸点が下がり、５〜３５°Ｃ程度の液温下での脱気
処理に限定される不都合があった。However, the above-mentioned conventional method has a disadvantage that the boiling point is lowered due to the vacuum depressurization treatment and the degassing treatment is limited to the liquid temperature of about 5 to 35 ° C.
【０００９】しかも、使用される中空糸の内径は、１５
０〜２００μｍ程度しかないため、固形成分を含む茶液
を流下させた際に目詰まりを起こすほか、粘度の高い茶
液を流下させることができないなど、茶液の性質と種類
によっては操作性が悪くなるなどの不具合もあった。Moreover, the inner diameter of the hollow fiber used is 15
Since it is only about 0 to 200 μm, it causes clogging when a tea liquor containing solid components is flowed down, and it is not possible to flow down a highly viscous tea liquor. There were also problems such as getting worse.
【００１０】[0010]
【課題を解決するための手段】本発明は従来技術にみら
れた上記課題に鑑みてなされたものであり、その構成上
の特徴は、緑茶の茶葉を飲用水で抽出する茶液抽出工程
と、抽出した茶液から溶存気体を除去する脱気処理工程
とを少なくとも含み、該脱気処理工程は、成形したホウ
ケイ酸ガラスを熱処理によりＳｉＯ2 に富んだ酸に溶け
にくい第１相と、ＳｉＯ2 が比較的少なく酸に溶けやす
い第２相とに分相させ、酸処理、さらに必要に応じてア
ルカリ処理により第２相を溶出させて形成された、肉厚
方向へと通じる多数の微細孔を有し、その平均細孔径が
０．１〜２５．０μｍの範囲内にあるＳｉＯ2 を主体と
する骨格からなる分相法多孔質ガラス膜材が用いられ、
該分相法多孔質ガラス膜材の一側面の側に窒素ガス等の
不活性ガスを圧入して陽圧とし、相対的に陰圧となる他
側面の側を流下する茶液の液相中に前記微細孔を介して
透過する前記不活性ガスにより微細気泡を生成させ、該
微細気泡の側に液相中の溶解気体を気液平衡による物質
移動をさせることによって脱気することにある。SUMMARY OF THE INVENTION The present invention has been made in view of the above problems found in the prior art, and its structural feature is a tea liquid extraction step of extracting tea leaves of green tea with drinking water. , A degassing treatment step of removing dissolved gas from the extracted tea liquor, wherein the degassing treatment step comprises heat treating the shaped borosilicate glass in a first phase insoluble in SiO 2 -rich acid, and SiO 2. A large number of fine pores formed in the wall thickness direction that are formed by separating the second phase into a second phase that has a relatively small amount of 2 and is easily soluble in acid, and eluting the second phase by acid treatment and, if necessary, alkali treatment. And a phase-separated method porous glass membrane material having a skeleton mainly composed of SiO 2 having an average pore diameter of 0.1 to 25.0 μm is used,
In the liquid phase of the tea liquor flowing down to the side of the other side where the inert gas such as nitrogen gas is pressed into one side of the porous glass membrane material of the phase separation method to make a positive pressure and the side of the other side becomes relatively negative pressure. That is, fine bubbles are generated by the inert gas that permeates through the fine pores, and dissolved gas in the liquid phase is degassed on the side of the fine bubbles by mass transfer by vapor-liquid equilibrium.
【００１１】[0011]
【作用】このため、供給される窒素ガス等の不活性ガス
により分相法多孔質ガラス膜材の一側面の側が陽圧とな
っているなかで、相対的に陰圧となる分相法多孔質ガラ
ス膜材の他側面の側を茶液が目詰まりすることなく円滑
に流下することになるので、茶液の液相中には、前記微
細孔を介して透過する前記不活性ガスを送入して微細気
泡を生成させることができ、このため、該微細気泡の側
に液相中の溶解気体を気液平衡による物質移動をさせる
ことによって脱気することができる。しかも、本発明方
法は、粘度の高い茶液であっても円滑に流下させること
ができるほか、真空減圧処理とは異なり高い温度の茶液
に対しても脱気処理を行うことができる。Therefore, while the positive pressure is applied to one side surface of the phase-separated porous glass membrane material by the supplied inert gas such as nitrogen gas, the phase-separated method porous glass having a relatively negative pressure is obtained. Since the tea liquor flows down smoothly on the other side of the high quality glass membrane material without clogging, the inert gas that permeates through the fine pores is sent into the liquid phase of the tea liquor. It is possible to generate fine bubbles by entering, and therefore, the dissolved gas in the liquid phase can be degassed by causing mass transfer by gas-liquid equilibrium on the side of the fine bubbles. Moreover, according to the method of the present invention, even tea liquid having a high viscosity can be smoothly flowed down, and unlike the vacuum depressurization treatment, the tea liquid having a high temperature can be deaerated.
【００１２】[0012]
【実施例】以下、図面を参酌して本発明の実施例を詳説
する。Embodiments of the present invention will be described below in detail with reference to the drawings.
【００１３】図１は、本発明方法の実施に供される装置
の概要を示す構成図であり、その全体は、飲用水により
緑茶の茶葉から茶液を抽出する茶液抽出処理を終え、ろ
過処理と必要な調合処理とを経た茶液が圧送される茶液
送入路１１と、該茶液送入路１１から供給される茶液を
脱気処理する脱気処理手段１２と、該脱気処理手段１２
を経て送出される茶液を加温する茶液加温手段２８と、
加温後の茶液を送液する茶液送出路２９と、該茶液送出
路２９から送り出される茶液を詰め入れる容器３０とを
少なくとも備えて構成されている。なお、容器３０が缶
やペットボトルなどの場合、茶液加温手段２８を経た茶
液は、一旦、貯蔵用タンク（図示せず）に貯蔵し、しか
る後、容器３０に詰め込むようにするものであってもよ
い。FIG. 1 is a block diagram showing an outline of an apparatus used for carrying out the method of the present invention. The whole of the apparatus is subjected to tea liquor extraction processing for extracting tea liquor from tea leaves of green tea with drinking water and filtration. The tea liquor inlet 11 through which the tea liquor that has been subjected to the treatment and the necessary mixing treatment is pressure fed, the deaeration treatment means 12 for deaerating the tea liquor supplied from the tea liquor inlet 11, and the deaerator. Qi processing means 12
Tea liquor heating means 28 for heating the tea liquor delivered via
It is configured to include at least a tea liquor delivery passage 29 for delivering the heated tea liquor, and a container 30 for packing the tea liquor delivered from the tea liquor delivery passage 29. When the container 30 is a can, a PET bottle, or the like, the tea liquid that has passed through the tea liquid heating means 28 is temporarily stored in a storage tank (not shown), and then stored in the container 30. May be
【００１４】このうち、前記脱気処理手段１２は、分相
法多孔質ガラス膜材１３と、該分相法多孔質ガラス膜材
１３の一側面１３ａの側に窒素ガス等の不活性ガスが圧
入されて形成される陽圧空間部１８と、他側面１３ｂの
側に形成される相対的な陰圧空間部１９とで形成されて
おり、したがって、陽圧空間部１８と陰圧空間部１９と
の間には差圧が生じることになる。Of these, the degassing means 12 has a phase separation method porous glass membrane material 13 and an inert gas such as nitrogen gas on one side 13a of the phase separation method porous glass membrane material 13. The positive pressure space 18 is formed by press-fitting, and the relative negative pressure space 19 is formed on the side of the other side surface 13b. Therefore, the positive pressure space 18 and the negative pressure space 19 are formed. There will be a differential pressure between and.
【００１５】この場合、前記脱気処理手段１２が備える
陽圧空間部１８と陰圧空間部１９とは、気密性が保持さ
れる容器体２０内に前記分相法多孔質ガラス膜材１３を
内蔵させることで区画形成される一側面１３ａの側を陽
圧空間部１８とし、他側面１３ｂ側を陰圧空間部１９と
することで形成されている。In this case, the positive pressure space portion 18 and the negative pressure space portion 19 of the degassing means 12 have the phase-separation method porous glass membrane material 13 in a container body 20 in which airtightness is maintained. It is formed by defining the side of the one side surface 13a defined by being built in as a positive pressure space portion 18 and the side surface of the other side surface 13b as a negative pressure space portion 19.
【００１６】これをより具体的に説明すれば、前記脱気
処理手段１２は、前記分相法多孔質ガラス膜材１３を図
２の（イ），（ロ）に示すように肉厚ｔが０．２〜２．
０ｍｍで外径ａが３〜１５ｍｍ程度の筒状に形成し、こ
のようにして形成された１本以上の適宜本数の分相法多
孔質ガラス膜材１３を容器体２０内にその上流側を茶液
送入路１１の終端に、下流側を茶液送出路２９の始端に
それぞれ接続させて配置し、容器体２０と筒状の分相法
多孔質ガラス膜材１３の一側面１３ａとの間には、圧力
調整弁２１と減圧弁２２とで供給圧力の調節を自在に制
御された窒素ガス等の不活性ガスを不活性ガスボンベ２
３の側から送気路２４を介して圧入することで密閉され
た陽圧空間部１８を形成し、相対的に陰圧となる茶液の
流路としての前記分相法多孔質ガラス膜材１３の他側面
１３ｂに位置する中空部１７を陰圧空間部１９とするこ
とでその全体が構成されている。To explain this more specifically, the degassing means 12 has a wall thickness t of the phase separation method porous glass membrane material 13 as shown in FIGS. 2 (a) and 2 (b). 0.2-2.
It is formed into a cylindrical shape having an outer diameter a of 3 mm to 15 mm with a diameter of 0 mm, and an appropriate number of one or more phase-separated porous glass membrane materials 13 thus formed is placed in the container body 20 on the upstream side. At the end of the tea liquid inflow passage 11, the downstream side is arranged to be connected to the start end of the tea liquid delivery passage 29, respectively, and the container body 20 and the one side surface 13a of the cylindrical phase separation method porous glass membrane material 13 are arranged. In between, an inert gas cylinder 2 is provided with an inert gas, such as nitrogen gas, whose supply pressure is freely adjusted by a pressure adjusting valve 21 and a pressure reducing valve 22.
The porous glass membrane material of the phase separation method as a flow path of the tea liquor which forms a relatively negative pressure by forming a positive pressure space 18 which is closed by press-fitting it from the side of 3 through the air supply passage 24. The hollow portion 17 located on the other side surface 13b of 13 is configured as a negative pressure space portion 19 so as to be entirely configured.
【００１７】図３の（イ），（ロ）は、分相法多孔質ガ
ラス膜材１３における微細孔の形成過程を拡大して示す
断面図であり、（イ）に示すように成形したホウケイ酸
ガラスを熱処理によりＳｉＯ2 に富んだ酸に溶けにくい
第１相１４と、ＳｉＯ2 が比較的少なく酸に溶けやすい
第２相１５とに分相させ、酸処理、さらに必要に応じて
アルカリ処理により第２相１５を溶出させて形成され
た、肉厚（ｔ）方向へと通じる多数の微細孔１６を有
し、その平均細孔径が０．１〜２５．０μｍの範囲内に
あるＳｉＯ2 を主体とする骨格のもとで（ロ）に構造の
分相法多孔質ガラス膜材１３が形成されることになる。3 (a) and 3 (b) are sectional views showing, in an enlarged manner, the process of forming fine pores in the phase separation method porous glass membrane material 13, and the borosilicate molded as shown in FIG. 3 (a). by heat treatment acid glass and the first phase 14 hardly soluble in acid rich SiO 2, and the second phase 15 of soluble SiO 2 is relatively small acid was bisection phase, acid treatment, if necessary alkali treatment SiO 2 having a large number of fine pores 16 formed by eluting the second phase 15 and communicating with the thickness (t) direction, and having an average pore diameter within the range of 0.1 to 25.0 μm. Under the skeleton mainly composed of (2), the phase separation method porous glass membrane material 13 having a structure is formed.
【００１８】本発明方法の実施に供される脱気処理手段
１２において分相法多孔質ガラス膜材１３を用いる理由
は、同様に微細孔を備えてなる燒結セラミックス、例え
ばアルミナなどの他の素材に比較してバラツキの少ない
均一な細孔径のもとで微細孔１６が形成されている結
果、これらの微細孔１６を介して分相法多孔質ガラス膜
材１３の全周面から均等に微細気泡を生成できることに
よる。また、この場合、微細孔１６の平均細孔径を０．
１〜２５．０μｍの範囲とした理由は、平均細孔径を
０．１μｍより小とすると微細気泡を生成させるために
供給される不活性ガスにコンプレッサーなどの加圧手段
を用いて必要以上に強い圧力を付与する必要が生ずる結
果、脱気処理手段１２の全体も耐圧性に富む構造としな
ければならないほか、装置的なコスト上昇をも招いてし
まうことになり、一方、平均細孔径を２５．０μｍより
大とすると生成される気泡が比較的大きなものになる結
果、茶液中での気泡の滞留時間が短かくなったり、気液
接触面積が小さくなるなどして脱気効率を低下させてし
まう不都合が生じることによる。The reason why the phase-separated porous glass membrane material 13 is used in the degassing treatment means 12 used for carrying out the method of the present invention is that the sintered ceramics also having fine pores, for example, other materials such as alumina. As a result of forming the fine pores 16 with a uniform fine pore diameter with less variation as compared with the above, the fine pores 16 are uniformly finely distributed from the entire peripheral surface of the phase separation method porous glass membrane material 13 through these fine pores 16. It is possible to generate bubbles. Further, in this case, the average pore diameter of the fine pores 16 is set to 0.
The reason for setting the range of 1 to 25.0 μm is that when the average pore diameter is smaller than 0.1 μm, the inert gas supplied for generating fine bubbles is stronger than necessary by using a pressurizing means such as a compressor. As a result of the need to apply pressure, the entire degassing means 12 must have a structure that is highly resistant to pressure, and the cost of the device will rise, while the average pore diameter is 25. If the size is larger than 0 μm, the bubbles generated become relatively large, and as a result, the residence time of the bubbles in the tea liquid becomes short, the gas-liquid contact area becomes small, and the degassing efficiency decreases. This is due to the inconvenience.
【００１９】また、このような構成からなる前記脱気処
理手段１２において流路を形成している陰圧空間部１９
の下流側は、圧力調整弁３１を介在させた茶液送出路２
９の始端側に連結され、該茶液送出路２９の終端側に配
置された容器３０内に必要な処理を終えた茶液が茶飲料
３２として詰め込まれるようになっている。なお、図中
の符号２５は、前記茶液送入路１１に配設される圧力調
整弁を、２６は送気路２４に配置されている圧力計を、
２７は脱気処理手段１４における容器体２０内に溜るド
レンを排出制御するための排出弁を、３３は茶液送出路
２９に配置されている圧力計をそれぞれ示す。Further, the negative pressure space portion 19 forming a flow path in the degassing processing means 12 having such a structure.
The downstream side of the tea liquid delivery passage 2 with the pressure regulating valve 31 interposed.
The tea liquor 32, which is connected to the starting end of the tea liquor 9 and is disposed at the end of the tea liquor delivery path 29, is filled with the tea liquor 32 which has been subjected to the necessary treatment. In the figure, reference numeral 25 is a pressure adjusting valve arranged in the tea liquid supply passage 11, and 26 is a pressure gauge arranged in the air supply passage 24.
Reference numeral 27 denotes a discharge valve for controlling the discharge of the drain accumulated in the container body 20 in the degassing processing means 14, and 33 denotes a pressure gauge arranged in the tea liquid delivery passage 29.
【００２０】次に、上記構成からなる装置に適用して実
施される本発明方法の一実施例を説明する。Next, an embodiment of the method of the present invention implemented by being applied to the apparatus having the above structure will be described.
【００２１】すなわち、本発明方法は、緑茶の茶葉を飲
用水で抽出する茶液抽出工程と、抽出した茶液から溶存
気体を除去する脱気処理工程とを少なくとも含むもので
あり、必要に応じ、前記茶液抽出工程を経て抽出された
茶液をろ布などでろ過したり遠心分離することで行われ
る茶液ろ過工程と、ろ過した茶液を調合処理する茶液調
合工程とが前記脱気処理工程の前処理工程として用意さ
れ、さらに、該脱気処理工程の後処理工程として茶液を
加温する茶液加温工程や加温後の茶飲料３２を容器３０
に詰め入れる容器詰め工程などを用意するものであって
もよい。なお、容器３０が缶などの耐熱容器である場合
には、容器詰め工程を経た後に例えば１２１°Ｃで７分
間加熱殺菌するなどして行われる加熱殺菌工程を含むも
のであってもよい。That is, the method of the present invention comprises at least a tea liquor extraction step of extracting green tea leaves with drinking water and a degassing treatment step of removing dissolved gas from the extracted tea liquor, and if necessary. The tea liquor filtering step performed by filtering or centrifuging the tea liquor extracted through the tea liquor extraction step and the tea liquor blending step of blending the filtered tea liquor are performed as described above. A tea liquid warming process for heating tea liquor, which is prepared as a pretreatment process of the air treatment process, and a tea beverage 32 after heating as a posttreatment process of the deaeration treatment process
It may be one that prepares a container filling process for filling the container. In addition, when the container 30 is a heat-resistant container such as a can, it may include a heat sterilization step performed by, for example, heat sterilizing at 121 ° C. for 7 minutes after the container filling step.
【００２２】このうち、前記茶液抽出工程は、脱イオン
水や水道水など、適宜の飲用水を一旦、沸騰させた後、
８０°Ｃ程度に冷ましてから煎茶や番茶、釜いり茶な
ど、適宜種類の茶葉を適量投入し、茶液を抽出すること
で行われる。Of these, in the tea liquor extraction step, appropriate drinking water such as deionized water or tap water is once boiled,
After cooling to about 80 ° C., an appropriate amount of tea leaves such as sencha, bancha, kettle-iricha, etc. is added and the tea liquor is extracted.
【００２３】また、前記茶液ろ過工程は、茶液抽出工程
にて抽出された茶液をろ布や限外ろ過膜など、適宜のろ
過手法を用いて行われ、ろ過後に得られた茶液は、次の
処理工程である茶液調合工程にてアスコルビン酸ナトリ
ウムと炭酸水素ナトリウムとが適量添加され、調合処理
される。In the tea liquor filtering step, the tea liquor extracted in the tea liquor extracting step is subjected to an appropriate filtering technique such as a filter cloth or an ultrafiltration membrane, and the tea liquor obtained after filtration is obtained. In the tea liquor blending step, which is the next treatment step, is prepared by adding an appropriate amount of sodium ascorbate and sodium hydrogen carbonate.
【００２４】一方、前記脱気処理工程は、図１に示す前
記脱気処理手段１２を用いて行われる。On the other hand, the degassing process is carried out by using the degassing means 12 shown in FIG.
【００２５】すなわち、上流側を茶液送入路１１の終端
に、下流側を茶液送出路２９の始端にそれぞれ接続させ
た筒状の分相法多孔質ガラス膜材１３は、容器体２０内
にてその一側面１３ａの側に窒素ガス等の不活性ガスが
圧入される陽圧空間部１８を、他側面１３ｂの側に調合
処理を終えた茶液を流下させる中空部１７としての陰圧
空間部１９をそれぞれ区画形成しているので、前記中空
部１７内を流下する茶液の液相中に前記微細孔１６を介
して前記不活性ガスを透過させて微細気泡を生成させる
ことができ、該微細気泡の側に液相中の溶解ガスを気液
平衡による物質移動をさせることによって脱気されるこ
とになる。That is, the cylindrical phase-separated porous glass membrane material 13 whose upstream side is connected to the end of the tea liquor feed passage 11 and whose downstream side is connected to the start end of the tea liquor feed passage 29 is the container body 20. A positive pressure space 18 into which an inert gas such as nitrogen gas is press-fitted on one side 13a side, and a hollow part 17 on the other side 13b side for flowing down the prepared tea liquor. Since each of the pressure spaces 19 is partitioned and formed, it is possible to allow the inert gas to permeate through the fine holes 16 into the liquid phase of the tea liquid flowing down in the hollow portion 17 to generate fine bubbles. Therefore, the dissolved gas in the liquid phase is degassed by causing mass transfer by gas-liquid equilibrium on the side of the fine bubbles.
【００２６】しかも、この際に茶液の液相中に生成され
る微細気泡は、茶液自体が常に中空部１７内を流下して
移動していることからその成長が抑制され、したがっ
て、茶液との間に確保される気液接触面積を大きなもの
とすることができるので、気液接触面での溶解気体の物
質移動（気相への拡散）効果を大幅に向上させることが
できる。Moreover, the fine bubbles generated in the liquid phase of the tea liquor at this time are restrained from growing because the tea liquor itself always flows down and moves in the hollow portion 17, and therefore, the growth of the tea Since the gas-liquid contact area secured with the liquid can be made large, the effect of mass transfer (diffusion into the gas phase) of the dissolved gas on the gas-liquid contact surface can be greatly improved.
【００２７】さらに、本発明方法は、従来からある真空
減圧処理手法とは異なり、低温から高温（例えば水道水
の場合には０〜１００°Ｃ）にまで至る広い温度領域の
もとで脱気処理することができ、特に茶液の温度が沸点
に近い高温のものであっても好適に実施することがで
き、種々の茶液との関係で適用領域の拡大を図ることが
できる。Further, unlike the conventional vacuum decompression treatment method, the method of the present invention degasses in a wide temperature range from low temperature to high temperature (for example, 0 to 100 ° C in the case of tap water). It can be treated, and can be preferably carried out even when the temperature of the tea liquor is a high temperature close to the boiling point, and the application area can be expanded in relation to various tea liquors.
【００２８】また、前記分相法多孔質ガラス膜材１３と
して外径ａが１０ｍｍ程度の筒状に形成された図２の
（イ），（ロ）に示すようにな形状のものを用いる場合
には、茶液が固形成分を含むものであったり、高い粘度
を保持しているものであっても円滑に脱気処理を行うこ
とができる。When the phase-separation method porous glass membrane material 13 having a cylindrical shape with an outer diameter a of about 10 mm as shown in FIGS. 2 (a) and 2 (b) is used. In addition, even if the tea liquor contains a solid component or has a high viscosity, the deaeration process can be smoothly performed.
【００２９】なお、容器３０として缶が用いられる場合
には、脱気処理を終えた後の茶液を熱交換器からなる茶
液加温手段２８により加温することで、脱気を促進させ
たり缶内で必要以上の内部圧力が生じないようにする処
理が施され、加温後の茶液は、缶などの適宜の容器３０
内に茶飲料３２として詰め込まれ、さらには、例えば１
２１°Ｃで７分間加熱するなどして行われる加熱殺菌処
理工程や冷却処理工程など、必要な適宜の作業を経てそ
の処理を終了する。When a can is used as the container 30, the tea liquor after the deaeration process is heated by the tea liquor heating means 28 including a heat exchanger to accelerate the deaeration. The tea liquor, which has been subjected to a treatment to prevent unnecessary internal pressure from being generated in the can, is heated in an appropriate container 30 such as a can.
It is packed as tea beverage 32 inside, and further, for example, 1
The treatment is completed after performing appropriate operations such as a heat sterilization treatment step and a cooling treatment step performed by heating at 21 ° C. for 7 minutes.
【００３０】次に、本発明方法が奏する効果を確認する
ために行った実験の結果について説明する。Next, the result of an experiment conducted to confirm the effect of the method of the present invention will be described.
【００３１】本発明方法の効果を確認するための実験
は、既に述べた図１に示す装置を用いて行った。この際
に用いた分相法多孔質ガラス膜材は多孔質膜材と略称す
る。なお、上記装置を用いて試験を行った際の条件を次
に示す。 多孔質膜材のサイズ １０ｍｍ（外径ａ）×２３０
ｍｍ（長さ）×１本 多孔質膜材の細径孔 ０．５（μｍ） 原料茶 一番茶期の煎茶（やぶきた
強火入れ） 茶液の抽出 ８０±２°Ｃの脱イオン水で
３分間（茶１ｇ／１００ｍリットル相当） 調合処理 Ｌ−アスコルビン酸ナトリウ
ム０．０３％、炭酸水素ナトリウム０．００５％を添加 水流量 １．８５（リットル／ｍｉ
ｎ） 水圧力 １．２５（ｋｇ／ｃｍ2 ） 窒素ガス流量 ０．９２５（リットル／ｍｉ
ｎ） 窒素ガス圧力 ４．２５（ｋｇ／ｃｍ2 ） 調合茶液溶存酸素濃度 ７．５（ｐｐｍ）The experiment for confirming the effect of the method of the present invention was conducted by using the apparatus shown in FIG. The phase separation method porous glass membrane material used at this time is abbreviated as a porous membrane material. The conditions for conducting a test using the above apparatus are shown below. Size of porous membrane material 10 mm (outer diameter a) x 230
mm (length) x 1 Small pores of porous membrane material 0.5 (μm) Raw tea
High heat) Extraction of tea liquor Demineralized water at 80 ± 2 ° C for 3 minutes (equivalent to 1 g of tea / 100 ml) Preparation treatment Add L-sodium ascorbate 0.03% and sodium bicarbonate 0.005% Water flow rate 1.85 (liter / mi
n) Water pressure 1.25 (kg / cm 2 ) Nitrogen gas flow rate 0.925 (liter / mi
n) Nitrogen gas pressure 4.25 (kg / cm 2 ) Dissolved oxygen concentration in the mixed tea liquid 7.5 (ppm)
【００３２】図４は、図１に示す構成の装置を用い、上
記条件下で実験を行った際に得られた脱気処理後の茶液
を缶に充填した後、１２１°Ｃで７分間加熱殺菌し、冷
ましてから取り出した茶液に対し複数の茶専門のパネラ
ーが下した官能審査の結果を示すものである。なお、表
１における「評価点」とは、評価項目の「水色」と「レ
トルト臭」と「嗜好性」とのそれぞれにつき、「対照と
の関係で差なし」を０点とし、「水色非常に悪い」，
「レトルト臭非常に強い」，「嗜好性非常に悪い」のそ
れぞれを「−３点」とし、「水色非常によい」，「レト
ルト臭非常に弱い」，「嗜好性非常に好き」のそれぞれ
を「＋３点」とし、その間に位置する「やや」を「±１
点」、「かなり」を「±２点」とすることで前記パネラ
ーにより評価させ、その平均値を棒グラフ化して表示し
たものである。また、図４中の「Ｎｏ．１」は、本発明
方法による脱気処理を行っていない９０°Ｃの茶液を、
「Ｎｏ．２」は、本発明方法による脱気処理を行ってい
ない６０°Ｃの茶液を、「Ｎｏ．３」は、本発明方法に
よる脱気処理を行った９０°Ｃの茶液を、「Ｎｏ．４」
は、本発明方法による脱気処理を行った６０°Ｃの茶液
をそれぞれの試料として用いている。FIG. 4 shows that the deaeration-treated tea liquor obtained when an experiment was conducted under the above conditions was filled in a can using the apparatus having the configuration shown in FIG. The results of the sensory examination conducted by a plurality of tea-specialized panelists on the tea liquor taken out after heat sterilization and cooling. The "evaluation score" in Table 1 is "light blue", "retort odor", and "preference" for each of the evaluation items. Bad "
"Retort odor is very strong" and "Patient is very bad" are each set to "-3 points", and "Light blue is very good", "Retort odor is very weak", and "Patient is very favorite". "+3 points" and "somewhat" located between them is "± 1"
It is evaluated by the panelists by setting “point” and “significant” to “± 2 points”, and the average value is displayed as a bar graph. In addition, “No. 1” in FIG. 4 is a 90 ° C. tea liquor that has not been deaerated by the method of the present invention.
“No. 2” is the tea liquid at 60 ° C. that has not been degassed by the method of the present invention, and “No. 3” is the tea liquid at 90 ° C. that has been degassed by the method of the present invention. , "No. 4"
Uses 60 ° C. tea liquor deaerated by the method of the present invention as each sample.
【００３３】その結果、本発明方法により分相法多孔質
ガラス膜材を用いて脱気処理を行っている茶液は、温度
の如何にかかわらず脱気処理を行っていない茶液に比較
して「水色」，［レトルト臭」，「嗜好性」のいずれの
評価項目においても優れたものとなっていることが判明
した。As a result, the tea liquor deaerated by the method of the present invention using the phase-separated porous glass membrane material is compared with the tea liquor not deaerated regardless of the temperature. It was found that all of the evaluation items "light blue", "retort odor", and "palatability" were excellent.
【００３４】図５は、図４に示す「Ｎｏ．１」〜「Ｎ
ｏ．４」の各試料を２３°Ｃまで冷やして缶に充填する
時点での溶存酸素濃度を示すものである。FIG. 5 shows "No. 1" to "N" shown in FIG.
o. 4] shows the dissolved oxygen concentration at the time of cooling each sample of "4" to 23 ° C and filling the can.
【００３５】同図によれば、調合処理工程での茶液の溶
存酸素濃度が７．５ｐｐｍであったものが、「Ｎｏ．
１」では結果的に加熱法で脱気処理されているにもかか
わらず、未だ１．２ｐｐｍも残存しており、より低温で
加熱されている「Ｎｏ．２」は５．１ｐｐｍ残留してい
るに対し、本発明方法により分相法多孔質ガラス膜材を
用いて脱気処理を行っている茶液は、「Ｎｏ．３」が
０．１ｐｐｍまで、「Ｎｏ．４」が０．５ｐｐｍまでそ
れぞれ低下しており、図４における官能審査の結果と溶
存酸素濃度の高低とが対応関係にあることが確認され
た。According to the figure, the dissolved oxygen concentration of the tea liquor in the blending process was 7.5 ppm.
Despite the result of degassing by the heating method, 1.2 ppm still remains in “1” and 5.1 ppm remains in “No. 2” that is heated at a lower temperature. On the other hand, in the tea liquor subjected to the degassing treatment using the phase separation method porous glass membrane material according to the method of the present invention, “No. 3” is up to 0.1 ppm and “No. 4” is up to 0.5 ppm. It was confirmed that there was a correspondence between the results of the sensory examination in FIG. 4 and the level of dissolved oxygen concentration.
【００３６】[0036]
【表１】 [Table 1]
【００３７】上記表１は、図１に示す構成の装置を用
い、図４におけると同様の前記条件下で実験を行った際
に得られた脱気処理後の茶液を缶に充填した後、１２１
°Ｃで７分間加熱殺菌し、冷ましてから取り出した茶液
（「Ｎｏ．５」を除く）に対して行われたものであり、
このうち、「Ｎｏ．１」は、本発明方法による脱気処理
を行っていない９０°Ｃの茶液を、「Ｎｏ．２」は、本
発明方法による脱気処理を行っていない６０°Ｃの茶液
を、「Ｎｏ．３」は、本発明方法による脱気処理を行っ
た９０°Ｃの茶液を、「Ｎｏ．４」は、本発明方法によ
る脱気処理を行った６０°Ｃの茶液を、「Ｎｏ．５」
は、調合処理工程を経た後、直ちに−８０°Ｃで凍結保
存してテスト時点で溶かしたもので、本発明方法による
脱気処理はしていないものの、加熱殺菌されていない理
想的な品質を備えているテスト用原液をそれぞれ試料と
し、これらの各試料を分光光度計を用いてその吸光度を
調べたものである。なお、「Ｎｏ．１」〜「Ｎｏ．４」
までの各試料は、いずれも測定前に細径孔が０．４５μ
ｍの精密ろ過膜を透過させて得られたものである。In Table 1 above, after the deaeration-treated tea liquor obtained when an experiment was conducted under the same conditions as in FIG. , 121
It was performed on tea liquor (excluding "No. 5") that had been sterilized by heating at 7 ° C for 7 minutes and then cooled,
Among them, "No. 1" is a tea liquor at 90 ° C which has not been deaerated by the method of the present invention, and "No. 2" is 60 ° C which has not been deaerated by the method of the present invention. The tea liquor of "No. 3" is deaerated by the method of the present invention at 90 ° C and the "No. 4" is deaerated by the method of the present invention at 60 ° C. No. 5 of tea liquor
Is a product immediately after the preparation treatment step, which was frozen and stored at −80 ° C. and thawed at the time of the test. Although it was not degassed by the method of the present invention, it had an ideal quality that was not heat-sterilized. The prepared stock solutions for testing were used as samples, and the absorbance of each of these samples was examined using a spectrophotometer. In addition, "No. 1" to "No. 4"
Each sample up to 0.45μ has a small hole before measurement.
It was obtained by passing through a microfiltration membrane of m.
【００３８】上表によれば、「Ｎｏ．３」と「Ｎｏ．
４」との各試料が抽出したての理想的な品質を保持して
いる茶液である「Ｎｏ．５」の試料と同等程度に低い吸
光度を保持しているのに対し、「Ｎｏ．１」と「Ｎｏ．
２」との各試料が相対的に高い吸光度を保持しているこ
とが確認され、このことからも、「Ｎｏ．１」と「Ｎ
ｏ．２」との各茶液が褐変していることを知ることがで
きる。According to the above table, "No. 3" and "No.
4 ”each has a low absorbance comparable to that of the sample of“ No. 5 ”which is the tea liquor that retains the ideal quality of freshly extracted, whereas“ No. 1 ” And “No.
It was confirmed that each sample with “2” had a relatively high absorbance. From this, it was confirmed that “No. 1” and “N
o. It can be seen that each tea liquor "2" is browning.
【００３９】以上に述べた実験結果からみても、本発明
方法によれば、茶液に対し優れた脱気効果を得ることが
できたことが判明する。From the experimental results described above, it is found that the method of the present invention was able to obtain an excellent deaerating effect on the tea liquor.
【００４０】なお、本発明において分相法多孔質ガラス
膜材１３の微細孔１６の平均細孔径は、所謂水銀圧入法
により得られたデータを微分した際のピーク値に対応し
て定まる孔径により求めたものである。In the present invention, the average pore diameter of the fine pores 16 of the phase-separated porous glass membrane material 13 is determined by the peak diameter obtained by differentiating the data obtained by the so-called mercury intrusion method. It is what I asked for.
【００４１】[0041]
【発明の効果】以上述べたように本発明方法によれば、
供給される窒素ガス等の不活性ガスにより分相法多孔質
ガラス膜材の一側面の側が陽圧となっているなかで、相
対的に陰圧となる分相法多孔質ガラス膜材の他側面の側
を茶液が目詰まりすることなく円滑に流下することにな
るので、茶液の液相中には、前記微細孔を介して透過す
る前記不活性ガスを送入して微細気泡を生成させること
ができ、このため、該微細気泡の側に液相中の溶解気体
を気液平衡による物質移動をさせることによって脱気す
ることができる。したがって、得られる茶飲料に対して
は、酸化作用を抑制した優れた品質を保持させることが
できる。しかも、本発明方法は、粘度の高い茶液であっ
ても円滑に流下させることができるほか、真空減圧処理
とは異なり高い温度の茶液に対しても脱気処理を行うこ
とができる。As described above, according to the method of the present invention,
While the positive pressure is applied to one side surface of the phase-separated porous glass membrane material by the supplied inert gas such as nitrogen gas, other than the phase-separated method porous glass membrane material, which has a relatively negative pressure. Since the tea liquor will flow down smoothly on the side of the side without clogging, the inert gas that permeates through the fine pores is fed into the liquid phase of the tea liquor to form fine bubbles. It can be generated, and therefore, the dissolved gas in the liquid phase can be degassed by subjecting the dissolved gas in the liquid phase to mass transfer by gas-liquid equilibrium. Therefore, the obtained tea beverage can retain excellent quality with suppressed oxidative action. Moreover, according to the method of the present invention, even tea liquid having a high viscosity can be smoothly flowed down, and unlike the vacuum depressurization treatment, the tea liquid having a high temperature can be deaerated.
【図１】本発明方法の実施に供される装置構成の一例を
示す説明図である。FIG. 1 is an explanatory diagram showing an example of a device configuration used for carrying out a method of the present invention.
【図２】本発明方法の実施に供される装置構成における
脱気処理手段の分相法多孔質ガラス膜材をを筒状に形成
した場合の形状を示す説明図である。FIG. 2 is an explanatory view showing the shape of a degassing treatment means in the apparatus configuration used for carrying out the method of the present invention when the phase-separated porous glass membrane material is formed into a cylindrical shape.
【図３】前記分相法多孔質ガラス膜材における微細孔の
形成過程を拡大して示す断面図であり、（イ）は分相状
態を、（ロ）はＳｉＯ2 が比較的少なく酸に溶けやすい
第２相を溶出させて微細孔を形成した状態をそれぞれ示
す。FIG. 3 is an enlarged cross-sectional view showing a process of forming fine pores in the phase separation method porous glass membrane material, in which (a) shows a phase separation state, and (b) shows a relatively small amount of SiO 2 and acid. The states in which the easily soluble second phase is eluted to form fine pores are shown.
【図４】本発明方法の奏する効果を確認するために行っ
た官能審査の結果を示すグラフ図である。FIG. 4 is a graph showing the results of a sensory examination conducted to confirm the effect of the method of the present invention.
【図５】本発明方法の奏する効果を確認するために各試
料に対して行った溶存酸素濃度を示すグラフ図である。FIG. 5 is a graph showing dissolved oxygen concentration performed for each sample in order to confirm the effect of the method of the present invention.
１１ 茶液送入路 １２ 脱気処理手段 １３ 分相法多孔質ガラス膜材 １３ａ 一側面 １３ｂ 他側面 １４ 第１相 １５ 第２相 １６ 微細孔 １７ 中空部 １８ 陽圧空間部 １９ 陰圧空間部 ２０ 容器体 ２１ 圧力調整弁 ２２ 減圧弁 ２３ 不活性ガスボンベ ２４ 送気路 ２５ 圧力調整弁 ２６ 圧力計 ２７ 排出弁 ２８ 茶液加温手段 ２９ 茶液送出路 ３０ 容器 ３１ 圧力調整弁 ３２ 茶飲料 ３３ 供給ポンプ 11 Tea Liquid Inlet Channel 12 Deaeration Treatment Means 13 Phase Separation Method Porous Glass Membrane Material 13a One Side 13b Other Side 14 First Phase 15 Second Phase 16 Micropores 17 Hollow Part 18 Positive Pressure Space 19 Negative Pressure Space 20 Container Body 21 Pressure Adjustment Valve 22 Pressure Reduction Valve 23 Inert Gas Cylinder 24 Air Supply Path 25 Pressure Adjustment Valve 26 Pressure Gauge 27 Discharge Valve 28 Tea Liquid Warming Means 29 Tea Liquid Delivery Path 30 Container 31 Pressure Adjustment Valve 32 Tea Beverage 33 Supply pump
───────────────────────────────────────────────────── フロントページの続き (72)発明者 中村 和雄 東京都千代田区丸の内二丁目１番２号 旭 硝子株式会社内 (72)発明者 岩崎 義彦 宮崎県延岡市土々呂町６丁目1633番地 清 本鐵工株式会社内 (72)発明者 長池 光一 宮崎県延岡市土々呂町６丁目1633番地 清 本鐵工株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuo Nakamura 2-1-2 Marunouchi, Chiyoda-ku, Tokyo Within Asahi Glass Co., Ltd. (72) Inventor Koichi Nagaike 6163-1, Todoro-cho, Nobeoka-shi, Miyazaki Prefecture Kiyomoto Iron Works Co., Ltd.
Claims (2)
工程と、抽出した茶液から溶存気体を除去する脱気処理
工程とを少なくとも含み、該脱気処理工程は、成形した
ホウケイ酸ガラスを熱処理によりＳｉＯ2 に富んだ酸に
溶けにくい第１相と、ＳｉＯ2 が比較的少なく酸に溶け
やすい第２相とに分相させ、酸処理、さらに必要に応じ
てアルカリ処理により第２相を溶出させて形成された、
肉厚方向へと通じる多数の微細孔を有し、その平均細孔
径が０．１〜２５．０μｍの範囲内にあるＳｉＯ2 を主
体とする骨格からなる分相法多孔質ガラス膜材が用いら
れ、該分相法多孔質ガラス膜材の一側面の側に不活性ガ
スを圧入して陽圧とし、相対的に陰圧となる他側面の側
を流下する茶液の液相中に前記微細孔を介して透過する
前記不活性ガスにより微細気泡を生成させ、該微細気泡
の側に液相中の溶解気体を気液平衡による物質移動をさ
せることによって脱気することを特徴とする茶飲料の脱
気方法。1. A tea liquor extraction step of extracting tea leaves of green tea with drinking water, and a degassing treatment step of removing dissolved gas from the extracted tea liquor, wherein the degassing treatment step is formed borosilicate and glass heat treatment by SiO 2 in rich poorly soluble first phase acid, soluble SiO 2 is relatively small acid was second-phase and two-minute phase, acid treatment, by further alkali treatment if necessary second Formed by eluting the phase,
A phase-separated porous glass membrane material having a skeleton mainly composed of SiO 2 having a large number of fine pores communicating in the thickness direction and having an average pore diameter within the range of 0.1 to 25.0 μm is used. The inert gas is pressed into one side of the phase-separated porous glass membrane material to make a positive pressure, and the above-mentioned is introduced into the liquid phase of the tea liquor flowing down to the side of the other side where the pressure becomes relatively negative. A tea characterized in that fine bubbles are generated by the inert gas that permeates through the fine pores, and the dissolved gas in the liquid phase is degassed on the side of the fine bubbles by mass transfer by gas-liquid equilibrium. How to degas beverages.
特徴とする請求項１に記載の茶飲料の脱気方法。2. The method for deaerating a tea beverage according to claim 1, wherein the inert gas is nitrogen gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3781394A JPH07222553A (en) | 1994-02-10 | 1994-02-10 | Method for degassing tea drink |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3781394A JPH07222553A (en) | 1994-02-10 | 1994-02-10 | Method for degassing tea drink |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07222553A true JPH07222553A (en) | 1995-08-22 |
Family
ID=12507966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3781394A Pending JPH07222553A (en) | 1994-02-10 | 1994-02-10 | Method for degassing tea drink |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07222553A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008113621A (en) * | 2006-11-07 | 2008-05-22 | Kao Corp | Method for producing beverage |
| WO2008072359A1 (en) * | 2006-12-14 | 2008-06-19 | Ito En, Ltd. | Process for producing tea drink |
| WO2008072361A1 (en) * | 2006-12-14 | 2008-06-19 | Ito En, Ltd. | Process for producing tea drink |
| JP2010215241A (en) * | 2009-03-13 | 2010-09-30 | Toyo Seikan Kaisha Ltd | Container-filled beverage, and method for manufacturing the same |
-
1994
- 1994-02-10 JP JP3781394A patent/JPH07222553A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008113621A (en) * | 2006-11-07 | 2008-05-22 | Kao Corp | Method for producing beverage |
| WO2008072359A1 (en) * | 2006-12-14 | 2008-06-19 | Ito En, Ltd. | Process for producing tea drink |
| WO2008072361A1 (en) * | 2006-12-14 | 2008-06-19 | Ito En, Ltd. | Process for producing tea drink |
| AU2006351677B2 (en) * | 2006-12-14 | 2011-03-10 | Ito En, Ltd. | Process for producing tea drink |
| AU2006351675B2 (en) * | 2006-12-14 | 2011-06-30 | Ito En, Ltd. | Method of manufacturing green tea beverage |
| US8568811B2 (en) | 2006-12-14 | 2013-10-29 | Ito En, Ltd. | Method of manufacturing tea drink |
| JP2010215241A (en) * | 2009-03-13 | 2010-09-30 | Toyo Seikan Kaisha Ltd | Container-filled beverage, and method for manufacturing the same |
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