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JP2004024094A - Roasting and extraction method for coffee raw bean - Google Patents

Roasting and extraction method for coffee raw bean Download PDF

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Publication number
JP2004024094A
JP2004024094A JP2002184594A JP2002184594A JP2004024094A JP 2004024094 A JP2004024094 A JP 2004024094A JP 2002184594 A JP2002184594 A JP 2002184594A JP 2002184594 A JP2002184594 A JP 2002184594A JP 2004024094 A JP2004024094 A JP 2004024094A
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Japan
Prior art keywords
coffee
roasting
heating
container
water
Prior art date
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JP2002184594A
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Japanese (ja)
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JP3781294B2 (en
Inventor
Katsuya Yamagata
山縣 克哉
Osamu Kashiwai
柏井 治
Hiroshi Hisamori
久守 博
Yoshiyuki Kitajima
北島 義之
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UCC Ueshima Coffee Co Ltd
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UCC Ueshima Coffee Co Ltd
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Priority to JP2002184594A priority Critical patent/JP3781294B2/en
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Publication of JP3781294B2 publication Critical patent/JP3781294B2/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a roasting and extraction method for roasting coffee raw beans and continuously performing roasting and extraction without crushing the roasted coffee beans and to provide a coffee extracted solution produced by the method. <P>SOLUTION: This roasting and extraction method comprises a process of soaking and filling coffee raw beans in water in a container capable of being heated under high pressure followed by heating the product under high pressure and a process of taking out the filled water from the container after heating so as to perform roasting and extraction for coffee at the same time in the same container. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は、コーヒー生豆の焙煎および抽出方法に関し、詳しくは、コーヒーの焙煎から抽出を同一工程で行う方法に関するものである。
【0002】
【従来の技術】
高圧での加熱による抽出は、特開平5−168410号公報にも記述されているように、コーヒー生豆を圧力によって、焙煎と加水分解を行い、大気圧下に開放することにより、爆砕処理し、さらにこの爆砕コーヒー豆から溶媒でコーヒー成分を抽出することが行われている。また、特開平5−168411号公報には、コーヒー抽出粕を同様に爆砕処理して、全体としてのコーヒー抽出率を高める製法が開示されている。
【0003】
前記方法を含め、従来は、焙煎および爆砕(粉砕)工程と抽出工程とを別々に行なっている。
【0004】
【発明が解決しようとする課題】
本発明の目的は、コーヒー生豆の焙煎を行い、焙煎されたコーヒー豆を粉砕することなく焙煎と抽出を連続的に行う方法およびそれにより製造されたコーヒー抽出液を提供することにある。
【0005】
【課題を解決するための手段】
本発明者らは、上記課題を解決するため鋭意研究したところ、高圧で加熱できる装置を設計し、所定の条件下でコーヒー生豆を処理することにより所期の目的を達成できることを見出し、本発明を完成するに至った。
【0006】
すなわち、本発明のコーヒーの焙煎方法は、高圧での加熱が可能な容器にコーヒー生豆を水に浸漬させて充填し、高圧条件下で加熱する工程を含むことを特徴とする。
【0007】
前記加熱は、0.6〜2.3MPa、160〜220℃で行われることが好ましい。
【0008】
また、本発明の同一容器内で同時にコーヒーの焙煎と抽出を行う方法は、高圧での加熱が可能な容器にコーヒー生豆を水に浸漬させて充填し、高圧条件下で加熱する工程、および加熱終了後、前記充填水を前記容器から取り出す工程を含むことを特徴とする。
【0009】
前記加熱は、0.6〜2.3MPa、160〜220℃で行われることが好ましい。
【0010】
また、本発明のコーヒー抽出液は、前記コーヒーの焙煎と抽出を同時に行う方法により製造されることを特徴とする。
【0011】
[作用効果]
本発明のコーヒーの焙煎方法によれば、同一容器中において続いてコーヒーの抽出も行うことができ、コーヒー抽出液の製造工程を短縮することができる。本発明の同一容器内で同時にコーヒーの焙煎と抽出を行う方法によれば、コーヒー生豆の焙煎と焙煎コーヒー豆の抽出工程を同一容器内で同一工程で行うことができ、コーヒー抽出液の製造工程を短縮することができるとともにコーヒー固形分の回収率にも優れ、さらに焙煎および抽出条件を適宜設定することにより所望のコーヒー抽出液を得ることができる。
【0012】
【発明の実施の形態】
以下、本発明の実施の形態について、説明する。
本発明のコーヒーの焙煎方法およびコーヒーの焙煎と抽出を同時に行う方法に使用される装置は、220℃、2.3MPa程度までの高圧加熱できる容器を備えたものである。本発明においては、前記装置には容器内の高圧力を強制的に下げる圧力開放弁を具備しないか、具備していても使用しないことが好ましい。その理由は、後述する。
【0013】
本発明のコーヒーの焙煎方法は、高圧での加熱が可能な容器にコーヒー生豆を水に浸漬させて充填し、高圧条件下で加熱する工程を含む。
【0014】
本発明に使用するコーヒー生豆の種類は、特に制限されるものではなく、アラビカ種、ロブスタ種、リベリカ種等のものが挙げられる。複数の種類をブレンドした豆を用いてもよい。
【0015】
浸漬する水は、イオン交換水、蒸留水等コーヒーの抽出に通常使用されるものが用いられうる。
【0016】
浸漬する水の量は、コーヒー生豆の重量と容器の容積に応じて適宜設定することができるが、コーヒー生豆の重量に対して0.5〜12倍量が好ましく、1〜9倍量がより好ましい。水の量が0.5倍未満であると、容器内での水分量が不足して生豆が均一に焙煎されない傾向があり、続く抽出工程で回収される液体量も少ない。一方、水の量が12倍を越えると、容器内が液体の水で充足されていまい、蒸気になる空隙がないため、本発明の焙煎と抽出の設定条件にそぐわない。
【0017】
前記コーヒー生豆を水に浸漬させて前記容器に充填し、高圧条件下で加熱する。
【0018】
前記加熱は、0.6〜2.3MPa、160〜220℃で行われ、好ましくは1.0〜1.9MPa、180〜210℃である。
【0019】
加熱温度が160℃未満であると、焙煎の進行および完了が順調に行われず、所望の焙煎度を達成しにくい。一方、加熱温度が220℃を越えると、コーヒー生豆が短時間で炭化する場合があり、良好な焙煎コーヒー豆が得られにくい。
【0020】
加熱温度が所定の値に達した後、その温度で一定時間保持してもよく、直ちに加熱を終了させてもよい。保持時間は保持温度に応じて適宜設定することができるが、通常0〜60分である。
【0021】
その後、加熱時の圧力が常圧(大気圧)に下がるまで放置する。放置時間は装置や圧力により異なるが、150〜350分程度である。但し、全浸漬時間が10時間を越えると生産性の低下やコーヒー固形分の回収率の低下につながるので、常圧まで低下した後はできる限り早く充填水を取り出すことが好ましい。
【0022】
前記放置期間中に、コーヒー生豆の焙煎が進行し、完了する。したがって、本発明では、前記したように、容器内の高圧力を強制的に下げないことが好ましい。また、焙煎および抽出で生成された香気成分がすべて容器内に保持され、その様子が確認できることも好ましい理由である。
【0023】
焙煎工程の進行は、コーヒー香気成分中のメイラード反応による生成物により確認することができる。
【0024】
メイラード反応により生成されるコーヒー香気成分中の化合物としては、2−メチルブタナール、3−メチルブタナール、2,3−ブタンジオン、2,3−ペンタンジオン、ピリジンおよびピラジンなどが代表例として挙げられる。焙煎の進行に伴い、これらの化合物の香気成分中の含有量が増加してくる。焙煎工程が完了したという目安は、前記化合物の含有量が0%から増加することにより確認することができる。例えば、2−メチルブタナールの含有量は、コーヒーの全香気成分中の約1〜約10%である。
【0025】
前記含有量は、ガスクロマトグラフィーにより測定することができ、測定方法は、実施例に記載されている。
【0026】
本発明の同一容器内で同時にコーヒーの焙煎と抽出を行う方法は、高圧での加熱が可能な容器にコーヒー生豆を水に浸漬させて充填し、高圧条件下で加熱する工程、および加熱終了後、前記充填水を前記容器から取り出す工程を含む。
【0027】
加熱工程は、前記コーヒーの焙煎方法の工程と同一である。
【0028】
加熱終了後、常圧(大気圧)に戻った容器から前記充填水を取り出す。
【0029】
取り出した充填水は、必要に応じてろ過、遠心分離等の処理を行う。
【0030】
前記コーヒーの焙煎と抽出を同時に行う方法により、本発明のコーヒー抽出液が製造される。
【0031】
前記コーヒー抽出液は、約5〜40%の収率で得ることができる。
【0032】
前記収率は、コーヒー生豆の種類によっても前記範囲内で多少変動するが、本発明の方法によると、一工程で効率的にコーヒー固形分を抽出することができる。
【0033】
得られたコーヒー抽出液は、高温高圧で抽出されたものであるから、加水分解に由来する独特の風味を呈しており、このような風味を除去し、味覚を改善することが好ましい。味覚の改善方法としては、減圧濃縮による香りの除去が適している。減圧濃縮により前記コーヒー抽出液から香りを除去することにより、独特の風味も低減する。さらに、必要に応じて、香料等で味覚調整してもよい。
【0034】
前記コーヒー抽出液の用途は、容器入りコーヒー飲料の原料や希釈用飲料の原料等が挙げられる。
【0035】
【実施例】
以下、本発明の構成と効果を具体的に示す実施例等について説明する。
【0036】
(実施例1)
0.2kgの粉砕していないコーヒー生豆(サントスNo.4)を高圧加熱が可能な容器に投入し、常温(20℃)の水を2.25kg加えた。前記容器を密閉し、加熱を開始して約10分で160℃に達した。このときの容器内圧力は、0.6MPaであった。その後、前記容器を含む装置ごと放冷し、容器内の圧力が大気圧になった時点で、容器中の水を装置下部より回収し、160℃で焙煎したコーヒー抽出液を得た。
【0037】
(実施例2)
実施例1において、加熱温度を180℃(加熱開始より約12分、このときの容器内圧力は、1.0MPa)としたこと以外は実施例1と同様にして、180℃で焙煎したコーヒー抽出液を得た。
【0038】
(実施例3)
実施例1において、加熱温度を210℃(加熱開始より約20分、このときの容器内圧力は、1.9MPa)としたこと以外は実施例1と同様にして、210℃で焙煎したコーヒー抽出液を得た。
【0039】
(実施例4)
実施例1において、加熱温度を220℃(加熱開始より約30分、このときの容器内圧力は、2.3MPa)とし、同温度で10分間保持したこと以外は実施例1と同様にして、220℃で焙煎したコーヒー抽出液を得た。本実施例では、高圧加熱中に容器から蒸気が噴出し、採液量が2割程度損失した。
【0040】
(比較例1)
0.02kgの粉砕していないコーヒー生豆(サントスNo.4)に、20℃の水を0.225kg加えた。20℃で2.5時間浸漬した後、浸漬水を回収し、20℃でのコーヒー抽出液を得た。
【0041】
[抽出液の評価]
実施例および比較例で得られたコーヒー抽出液を、以下のような条件で比較した。結果を下記表1に示す。
【0042】
(1)コーヒー固形分の測定および収率
前記コーヒー抽出液の固形分を(株)アタゴ製デジタル屈折計RX−5000により測定し、ブリックス(Bx)として表した。これらの抽出液をBxが1.42となるようにそれぞれ希釈し、以下の測定に用いた。また、コーヒーの収率は、測定したBxの値に回収された液量を乗じて、使用した豆重量(生豆を焙煎豆重量に水分量で換算)で除して求めた。
【0043】
(2)pHおよび吸光度の測定
前記コーヒー抽出液を、東亜電波工業(株)pHメーターを用いてpHを測定した。
また、前記コーヒー抽出液(Bx=1.42)を、(株)日立製作所製分光光度計U−1500を用いて、720nmおよび420nmの吸光度を測定することによりそれぞれ抽出液の濁度および色の濃さを調べた。
【0044】
(3)ガスクロマトグラフィーによる香気量の測定
前記コーヒー抽出液(Bx=1.42)からそれぞれ10gを、22mLのバイアル瓶に採取し、密栓した。密栓したバイアル瓶を、Tekmar社製ガスクロマトグラフィー用オートサンプラにて80℃で20分間加温した後サンプリングし、ガスクロマトグラフィーで分析した。また、表1に示す特定成分を一定濃度で含む試料液も調製し、前記と同様にガスクロマトグラフィーで分析した。前記特定成分は、東京化成工業(株)製の標準試料を使用した。
【0045】
測定条件
測定装置:日立製ガスクロマトグラフィーG−3000
カラム:ジーエルサイエンス(株)製TC−WAX 0.53mm×30m
キャリヤーガス:ヘリウム
キャリヤーガス流量:1ml/分
カラム温度:40℃(5分)→220℃(5℃/分で昇温)
検出器:FID。
【0046】
ガスクロマトグラフィー分析によるピークの総面積を、総香気量として算出した。特定成分に対応するピークを特定成分の基準ピークと対比して同定し、各試料中のピーク総面積に対する割合を求めた。
【0047】
【表1】

Figure 2004024094
表1より、実施例1〜4のコーヒー抽出液は、吸光度の値からコーヒーの焙煎と抽出の進行が確認され、収率も良好であった。ガスクロマトグラフィーによる香気成分の比率をみると、コーヒーの焙煎が進行していない比較例のコーヒー抽出液では検出されない成分が増えていることがわかる。したがって、コーヒーの焙煎と抽出の進行は、これらの成分とその構成比率を調べることにより定性的かつ定量的に確認することができる。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for roasting and extracting green coffee beans, and more particularly to a method for performing roasting and extraction of coffee in the same step.
[0002]
[Prior art]
As described in Japanese Patent Application Laid-Open No. 5-168410, extraction by heating at high pressure is performed by roasting and hydrolyzing green coffee beans by pressure, and opening the same under atmospheric pressure to perform explosion treatment. Further, a coffee component is extracted from the exploded coffee beans with a solvent. In addition, Japanese Patent Application Laid-Open No. 5-168411 discloses a method of similarly exploding coffee extract cake to increase the coffee extraction rate as a whole.
[0003]
Conventionally, the roasting and blasting (crushing) steps and the extraction step are separately performed, including the above method.
[0004]
[Problems to be solved by the invention]
An object of the present invention is to provide a method for roasting green coffee beans, continuously performing roasting and extraction without crushing the roasted coffee beans, and a coffee extract produced by the method. is there.
[0005]
[Means for Solving the Problems]
The present inventors have conducted intensive studies to solve the above-mentioned problems, and found that an intended device can be achieved by designing a device capable of heating at high pressure and treating green coffee beans under predetermined conditions. The invention has been completed.
[0006]
That is, the method for roasting coffee of the present invention is characterized by including a step of immersing coffee green beans in water in a container capable of heating at high pressure, filling the same, and heating under high pressure conditions.
[0007]
The heating is preferably performed at 0.6 to 2.3 MPa at 160 to 220 ° C.
[0008]
Further, the method of simultaneously roasting and extracting coffee in the same container of the present invention is a step of immersing and filling green coffee beans in water in a container capable of heating at high pressure, and heating under high pressure conditions, And a step of removing the filling water from the container after the heating is completed.
[0009]
The heating is preferably performed at 0.6 to 2.3 MPa at 160 to 220 ° C.
[0010]
In addition, the coffee extract of the present invention is characterized by being produced by a method of simultaneously roasting and extracting coffee.
[0011]
[Effects]
ADVANTAGE OF THE INVENTION According to the roasting method of coffee of this invention, extraction of coffee can also be performed subsequently in the same container, and the manufacturing process of a coffee extract can be shortened. According to the method for simultaneously roasting and extracting coffee in the same container of the present invention, the roasting of green coffee beans and the extracting step of roasted coffee beans can be performed in the same container in the same step, The production process of the liquid can be shortened and the recovery rate of the coffee solid content is excellent, and a desired coffee extract can be obtained by appropriately setting roasting and extraction conditions.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described.
The apparatus used in the method for roasting coffee and the method for simultaneously roasting and extracting coffee according to the present invention includes a container capable of heating at 220 ° C. and high pressure up to about 2.3 MPa. In the present invention, it is preferable that the device does not include a pressure relief valve for forcibly reducing the high pressure in the container, or does not use it even if it does. The reason will be described later.
[0013]
The method for roasting coffee according to the present invention includes a step of immersing coffee green beans in water in a container capable of heating at high pressure, filling the same, and heating under high-pressure conditions.
[0014]
The type of green coffee beans used in the present invention is not particularly limited, and examples thereof include Arabica, Robusta, and Rebellica. Beans in which a plurality of types are blended may be used.
[0015]
The water to be immersed may be any of those commonly used for extracting coffee, such as ion-exchanged water and distilled water.
[0016]
The amount of water to be immersed can be appropriately set according to the weight of the green coffee beans and the volume of the container, but is preferably 0.5 to 12 times, more preferably 1 to 9 times the weight of the green coffee beans. Is more preferred. When the amount of water is less than 0.5 times, the amount of water in the container is insufficient, so that the green beans tend not to be roasted uniformly, and the amount of liquid collected in the subsequent extraction step is also small. On the other hand, if the amount of water exceeds 12 times, the inside of the container will be filled with liquid water, and there will be no void that becomes steam, which does not meet the roasting and extraction setting conditions of the present invention.
[0017]
The green coffee beans are immersed in water, filled in the container, and heated under high pressure conditions.
[0018]
The heating is performed at 0.6 to 2.3 MPa and 160 to 220 ° C., preferably 1.0 to 1.9 MPa and 180 to 210 ° C.
[0019]
If the heating temperature is lower than 160 ° C., the progress and completion of roasting are not performed smoothly, and it is difficult to achieve a desired degree of roasting. On the other hand, if the heating temperature exceeds 220 ° C., the green coffee beans may be carbonized in a short time, and it is difficult to obtain good roasted coffee beans.
[0020]
After the heating temperature reaches a predetermined value, the temperature may be maintained for a certain period of time, or the heating may be terminated immediately. The holding time can be appropriately set according to the holding temperature, and is usually 0 to 60 minutes.
[0021]
After that, it is left until the pressure at the time of heating decreases to normal pressure (atmospheric pressure). The leaving time varies depending on the apparatus and pressure, but is about 150 to 350 minutes. However, if the total immersion time exceeds 10 hours, the productivity and the recovery rate of the coffee solids will be reduced. Therefore, it is preferable to take out the filling water as soon as possible after the pressure is reduced to the normal pressure.
[0022]
During the standing period, roasting of the green coffee beans proceeds and is completed. Therefore, in the present invention, as described above, it is preferable not to forcibly reduce the high pressure in the container. It is also a preferable reason that all the aroma components generated by roasting and extraction are held in the container and the state thereof can be confirmed.
[0023]
The progress of the roasting step can be confirmed by the product of the Maillard reaction in the coffee aroma components.
[0024]
Typical examples of the compound in the coffee aroma component generated by the Maillard reaction include 2-methylbutanal, 3-methylbutanal, 2,3-butanedione, 2,3-pentanedione, pyridine, pyrazine and the like. . As the roasting proceeds, the content of these compounds in the aroma component increases. The indication that the roasting step has been completed can be confirmed by increasing the content of the compound from 0%. For example, the content of 2-methylbutanal is about 1 to about 10% of the total aroma component of coffee.
[0025]
The content can be measured by gas chromatography, and the measuring method is described in Examples.
[0026]
The method for simultaneously roasting and extracting coffee in the same container according to the present invention is a method in which green coffee beans are immersed in water and filled in a container capable of heating at high pressure, filled with water, and heated under high-pressure conditions, and heated. After the completion, a step of removing the filling water from the container is included.
[0027]
The heating step is the same as the step of the coffee roasting method.
[0028]
After the heating, the filling water is taken out of the container which has returned to normal pressure (atmospheric pressure).
[0029]
The filled water taken out is subjected to filtration, centrifugation, etc., if necessary.
[0030]
The coffee extract of the present invention is produced by the method of simultaneously roasting and extracting the coffee.
[0031]
The coffee extract can be obtained with a yield of about 5-40%.
[0032]
The yield varies somewhat within the above range depending on the type of green coffee beans, but according to the method of the present invention, coffee solids can be efficiently extracted in one step.
[0033]
Since the obtained coffee extract is extracted at high temperature and high pressure, it has a unique flavor derived from hydrolysis, and it is preferable to remove such a flavor and improve the taste. As a method for improving taste, removal of a scent by vacuum concentration is suitable. The unique flavor is also reduced by removing the aroma from the coffee extract by vacuum concentration. Further, if necessary, the taste may be adjusted with a fragrance or the like.
[0034]
Examples of the use of the coffee extract include a raw material for a coffee beverage in a container and a raw material for a beverage for dilution.
[0035]
【Example】
Hereinafter, examples and the like specifically illustrating the configuration and effects of the present invention will be described.
[0036]
(Example 1)
0.2 kg of unmilled green coffee beans (Santos No. 4) was put into a container capable of high-pressure heating, and 2.25 kg of water at normal temperature (20 ° C.) was added. The vessel was sealed and heated to 160 ° C. in about 10 minutes after starting heating. The pressure in the vessel at this time was 0.6 MPa. Thereafter, the apparatus including the container was allowed to cool, and when the pressure in the container reached atmospheric pressure, the water in the container was collected from the lower part of the device to obtain a coffee extract roasted at 160 ° C.
[0037]
(Example 2)
Coffee roasted at 180 ° C. in the same manner as in Example 1 except that the heating temperature was set to 180 ° C. (about 12 minutes from the start of heating, and the pressure in the container at this time was 1.0 MPa). An extract was obtained.
[0038]
(Example 3)
Coffee roasted at 210 ° C. in the same manner as in Example 1 except that the heating temperature was set to 210 ° C. (approximately 20 minutes from the start of heating, and the pressure in the container at this time was 1.9 MPa). An extract was obtained.
[0039]
(Example 4)
In Example 1, in the same manner as in Example 1 except that the heating temperature was set to 220 ° C. (approximately 30 minutes from the start of heating, and the pressure in the vessel at this time was 2.3 MPa), and the temperature was maintained for 10 minutes. A coffee extract roasted at 220 ° C. was obtained. In the present example, steam was ejected from the container during high-pressure heating, and the amount of sample collected was lost by about 20%.
[0040]
(Comparative Example 1)
0.225 kg of water at 20 ° C. was added to 0.02 kg of unground green coffee beans (Santos No. 4). After immersion at 20 ° C. for 2.5 hours, the immersion water was recovered to obtain a coffee extract at 20 ° C.
[0041]
[Evaluation of extract]
The coffee extracts obtained in Examples and Comparative Examples were compared under the following conditions. The results are shown in Table 1 below.
[0042]
(1) Measurement and Yield of Coffee Solid Content The solid content of the coffee extract was measured with a digital refractometer RX-5000 manufactured by Atago Co., Ltd., and expressed as Brix (Bx). These extracts were diluted so that Bx became 1.42, and used for the following measurements. The yield of coffee was determined by multiplying the measured value of Bx by the amount of the recovered liquid and dividing it by the weight of beans used (converted green beans to the weight of roasted beans by the amount of water).
[0043]
(2) Measurement of pH and Absorbance The pH of the coffee extract was measured using a pH meter of Toa Denpa Kogyo KK.
The coffee extract (Bx = 1.42) was measured for absorbance at 720 nm and 420 nm using a spectrophotometer U-1500 manufactured by Hitachi, Ltd. to obtain the turbidity and color of the extract, respectively. I checked the thickness.
[0044]
(3) Measurement of Aroma Content by Gas Chromatography 10 g of each of the coffee extract (Bx = 1.42) was collected in a 22 mL vial and sealed. The sealed vial was heated at 80 ° C. for 20 minutes using a gas chromatography autosampler manufactured by Tekmar, sampled, and analyzed by gas chromatography. Also, a sample solution containing the specific components shown in Table 1 at a constant concentration was prepared and analyzed by gas chromatography in the same manner as described above. As the specific component, a standard sample manufactured by Tokyo Chemical Industry Co., Ltd. was used.
[0045]
Measuring conditions Measuring device: Hitachi Gas Chromatography G-3000
Column: TC-WAX 0.53 mm x 30 m, manufactured by GL Sciences Corporation
Carrier gas: Helium carrier gas flow rate: 1 ml / min Column temperature: 40 ° C. (5 minutes) → 220 ° C. (heating at 5 ° C./min)
Detector: FID.
[0046]
The total area of the peaks by gas chromatography analysis was calculated as the total odor. The peak corresponding to the specific component was identified in comparison with the reference peak of the specific component, and the ratio to the total peak area in each sample was determined.
[0047]
[Table 1]
Figure 2004024094
From Table 1, the coffee extract of Examples 1 to 4 confirmed the progress of roasting and extraction of the coffee from the value of the absorbance, and the yield was good. Looking at the ratio of the aroma components by gas chromatography, it can be seen that the components not detected in the coffee extract of the comparative example in which the roasting of the coffee has not progressed have increased. Therefore, the progress of roasting and extraction of coffee can be qualitatively and quantitatively confirmed by examining these components and their constituent ratios.

Claims (5)

高圧での加熱が可能な容器にコーヒー生豆を水に浸漬させて充填し、高圧条件下で加熱する工程を含むコーヒーの焙煎方法。A method for roasting coffee, comprising the steps of immersing coffee green beans in water in a container capable of heating at high pressure, filling the same, and heating under high pressure conditions. 前記加熱が、0.6〜2.3MPa、160〜220℃で行われる請求項1に記載の焙煎方法。The roasting method according to claim 1, wherein the heating is performed at 0.6 to 2.3 MPa at 160 to 220 ° C. 高圧での加熱が可能な容器にコーヒー生豆を水に浸漬させて充填し、高圧条件下で加熱する工程、および加熱終了後、前記充填水を前記容器から取り出す工程を含む、同一容器内で同時にコーヒーの焙煎と抽出を行う方法。Filling a container capable of heating at high pressure by immersing the green coffee beans in water, heating under high-pressure conditions, and after the heating, including removing the filled water from the container, in the same container. A method of roasting and extracting coffee at the same time. 前記加熱が、0.6〜2.3MPa、160〜220℃で行われる請求項3に記載の方法。The method according to claim 3, wherein the heating is performed at 0.6 to 2.3 MPa at 160 to 220 ° C. 5. 請求項3または4に記載の方法により製造されたコーヒー抽出液。A coffee extract manufactured by the method according to claim 3.
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006035998A1 (en) * 2004-09-30 2006-04-06 Tama-Tlo Corporation Modified coffee, method of roasting coffee bean, coffee-like supplement and auxiliary food
WO2006108481A1 (en) * 2005-04-15 2006-10-19 Südzucker Aktiengesellschaft Mannheim/Ochsenfurt Thermal conduction during alkaline extraction
JP2022015107A (en) * 2020-07-08 2022-01-21 エジソンハード株式会社 Roaster

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006035998A1 (en) * 2004-09-30 2006-04-06 Tama-Tlo Corporation Modified coffee, method of roasting coffee bean, coffee-like supplement and auxiliary food
WO2006108481A1 (en) * 2005-04-15 2006-10-19 Südzucker Aktiengesellschaft Mannheim/Ochsenfurt Thermal conduction during alkaline extraction
EA012527B1 (en) * 2005-04-15 2009-10-30 Зюдцукер Акциенгезелльшафт Маннхайм/Окзенфурт Method of alkaline extraction from sugar-containing biological material
AU2006233529B2 (en) * 2005-04-15 2010-09-23 Sudzucker Aktiengesellschaft Mannheim/Ochsenfurt Thermal conduction during alkaline extraction
US8157917B2 (en) 2005-04-15 2012-04-17 Sudzucker Aktiengesellschaft Mannheim/Ochsenfurt Thermal conduction during alkaline extraction
JP2022015107A (en) * 2020-07-08 2022-01-21 エジソンハード株式会社 Roaster
JP7244023B2 (en) 2020-07-08 2023-03-22 エジソンハード株式会社 roasting equipment

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