JPH0641190A - Production of l-alpha-aspartyl-l-phenylalanine methyl ester - Google Patents

Production of l-alpha-aspartyl-l-phenylalanine methyl ester

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Publication number
JPH0641190A
JPH0641190A JP4189504A JP18950492A JPH0641190A JP H0641190 A JPH0641190 A JP H0641190A JP 4189504 A JP4189504 A JP 4189504A JP 18950492 A JP18950492 A JP 18950492A JP H0641190 A JPH0641190 A JP H0641190A
Authority
JP
Japan
Prior art keywords
apm
drying
aspartyl
methyl ester
phenylalanine methyl
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
JP4189504A
Other languages
Japanese (ja)
Inventor
Hiroshi Ichiki
寛 市木
Hisashi Hokogahara
久 鉾之原
Riyouichi Taneda
綾一 種田
Hiroyuki Ito
洋之 伊藤
Yoshitsugu Jinno
嘉嗣 神野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsui Toatsu Chemicals Inc
Original Assignee
Mitsui Toatsu Chemicals Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsui Toatsu Chemicals Inc filed Critical Mitsui Toatsu Chemicals Inc
Priority to JP4189504A priority Critical patent/JPH0641190A/en
Publication of JPH0641190A publication Critical patent/JPH0641190A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To produce L-alpha-aspartyl-L-phenylalanine methyl ester having excellent solubility. CONSTITUTION:L-alpha-Aspartyl-L-phenylalanine methyl ester containing water is dried by vibrational fluidized drying.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、溶解性に優れたL−α
−アスパルチル−L−フェニルアラニンメチルエステル
の製造法に関するものである。
The present invention relates to L-α excellent in solubility.
-Aspartyl-L-phenylalanine methyl ester production method.

【0002】[0002]

【従来の技術】L−α−アスパルチル−L−フェニルア
ラニンメチルエステル(以下、APMと記載する)を利
用するために要求される特性として溶解性の向上があ
る。APM結晶には、I型及びII型という2種類の結
晶型が存在し(特開昭59−172444号公報及び特
開昭60−37949号公報)、このうち溶解性が良好
な結晶型はI型結晶であることが知られている。通常、
APMの湿潤結晶を工業的な方法で乾燥すると、得られ
る結晶はI型結晶及びII型結晶の混合物となる。この
為、従来より溶解性向上を目的として、実質的にI型結
晶のみを含むAPMの製造方法が提案されている。
2. Description of the Related Art As a characteristic required for utilizing L-α-aspartyl-L-phenylalanine methyl ester (hereinafter referred to as APM), there is an improvement in solubility. There are two types of APM crystals, type I and type II (JP-A-59-172444 and JP-A-60-37949). Of these, the crystal form having good solubility is I. It is known to be a type crystal. Normal,
When the wet crystals of APM are dried by an industrial method, the crystals obtained are a mixture of type I crystals and type II crystals. Therefore, conventionally, a method for producing an APM containing substantially only I-type crystals has been proposed for the purpose of improving the solubility.

【0003】I型結晶のみを得る従来の技術としては、
(1)APMを50℃以下の温度で乾燥する方法(特開
昭63−33396号公報)、(2)APMの比表面積
が4m2/g以上であるように造粒して乾燥する方法
(特開昭63−44592号公報)、(3)絶対湿度
0.01kg/kg以下の乾燥空気を用いて乾燥する方
法(特開昭63−44593号公報)などがある。
As a conventional technique for obtaining only I-type crystal,
(1) A method of drying APM at a temperature of 50 ° C. or lower (JP-A-63-33396), and (2) a method of granulating and drying so that the specific surface area of APM is 4 m 2 / g or more ( JP-A-63-44592) and (3) a method of drying using dry air having an absolute humidity of 0.01 kg / kg or less (JP-A-63-44593).

【0004】しかし、(1)の方法では、乾燥温度を低
くすることによりI型結晶は得られるものの、乾燥温度
が低い為生産効率が非常に悪く、装置も大型になり実際
上あまり有利なプロセスとは言えない。(2)の方法で
は、比表面積に対する定義が無く、更に測定方法の説明
も無いことから具現化困難な技術と思われる。(3)の
方法では、空気湿度の調整が非常に困難で手間がかかり
不経済である。というように、従来の方法は何れも欠点
を有しており満足できる方法ではない。
However, in the method (1), although the I-type crystal can be obtained by lowering the drying temperature, the production efficiency is very poor because the drying temperature is low, and the apparatus becomes large, which is a very practical process. It can not be said. With the method (2), there is no definition for the specific surface area, and there is no explanation of the measuring method, so it is considered to be a difficult technique to implement. In the method (3), adjustment of air humidity is very difficult, time-consuming, and uneconomical. Thus, all the conventional methods have drawbacks and are not satisfactory.

【0005】[0005]

【発明が解決しようとする課題】従って、本発明の課題
は、溶解性の改善の為実質上II型結晶を含まないI型
結晶のAPMを製造するに当たり、従来法より効率の良
い方法を提供することである。
SUMMARY OF THE INVENTION Therefore, the object of the present invention is to provide a method which is more efficient than the conventional method in producing an APM of type I crystal which is substantially free of type II crystal for improving the solubility. It is to be.

【0006】[0006]

【発明を解決するための手段】本発明者らは、このよう
な現状に鑑み、溶解性に優れたAPMを取得する方法に
つき鋭意検討を重ねた結果、水分を含んだAPMの乾燥
を振動流動乾燥により行うことで、上記要請を十分満足
するAPMが得られるとの知見に至り、本発明を完成し
た。
In view of the above situation, the inventors of the present invention have made extensive studies as to a method for obtaining APM having excellent solubility, and as a result, have studied the drying of APM containing water by vibrating and flowing. The present invention has been completed based on the finding that APM that sufficiently satisfies the above requirements can be obtained by performing drying.

【0007】すなわち、本発明は、水分を含んだL−α
−アスパルチル−L−フェニルアラニンメチルエステル
の乾燥を、振動流動乾燥により行うことを特徴とするL
−α−アスパルチル−L−フェニルアラニンメチルエス
テルの製造法である。
That is, the present invention relates to L-α containing water.
-Aspartyl-L-phenylalanine methyl ester is dried by vibration fluidized drying.
This is a method for producing -α-aspartyl-L-phenylalanine methyl ester.

【0008】以下、本発明を詳細に説明する。本発明で
使用するAPMは、いかなる晶析方法及び分離方法を用
いて製造されていてもよくAPMの製造法については、
いっさい問わない。すなわち、本発明の方法で用いるA
PMを得るためには適当な方法によりAPMを晶析さ
せ、次いで固液分離を行って得ることができる。
The present invention will be described in detail below. The APM used in the present invention may be produced by using any crystallization method and separation method.
It doesn't matter at all. That is, A used in the method of the present invention
In order to obtain PM, it can be obtained by crystallizing APM by an appropriate method and then performing solid-liquid separation.

【0009】本発明に於ては、上記固液分離後得られ
る、水分を含んだAPMをそのまま振動流動乾燥に供す
ることもできるが、乾燥を効率的に行うため予め造粒し
ておくことが好ましい。造粒の際、APMの造粒径が5
mmを越えると流動しづらく、0.3mm未満では乾燥
機への付着などが生じるため、APMは0.3〜5mm
に造粒することが好ましい。又、造粒の方法としては、
押し出し造粒、圧縮造粒等種々の方法が利用出来る。
In the present invention, the APM containing water obtained after the above solid-liquid separation can be directly subjected to vibration fluidized drying, but it may be granulated in advance for efficient drying. preferable. When granulating, the particle size of APM is 5
If it exceeds 0.3 mm, it will be difficult to flow, and if it is less than 0.3 mm, it will adhere to the dryer, etc., so the APM will be 0.3-5 mm.
It is preferable to granulate. Also, as a method of granulation,
Various methods such as extrusion granulation and compression granulation can be used.

【0010】水分を含んだAPMを振動流動乾燥により
乾燥する。振動流動乾燥の方法は、一般に振動流動乾燥
として知られている方法であれば、何ら制限がなく、例
えば乾燥室本体内部の多孔板の上に連続チャージされた
湿潤APM粒を、振動作用によって跳躍移動させながら
下部より熱風を送り乾燥する。
The APM containing water is dried by vibration fluidized drying. The method of vibration fluidization drying is not particularly limited as long as it is generally known as vibration fluidization drying. For example, the wet APM particles continuously charged on the perforated plate inside the drying chamber main body are jumped by the vibration action. While moving, blow hot air from the bottom to dry.

【0011】乾燥温度は80℃以下、特に70℃以下が
好ましい。APMは、熱に対する安定性が弱い為、高温
で乾燥を行うと、一部ジケトピペラジン誘導体が生成す
る恐れがある。これは無毒で安全ではあるが、甘味がな
く、全体的には甘味ロスになることから好ましくない。
The drying temperature is preferably 80 ° C. or lower, more preferably 70 ° C. or lower. Since APM is weakly stable to heat, when it is dried at a high temperature, a diketopiperazine derivative may be partially produced. Although this is non-toxic and safe, it is not preferable because it has no sweetness and loses sweetness as a whole.

【0012】本発明に於ては、振動流動乾燥により乾燥
を行うので、極めて安定した振動状態のもとに、しかも
均一な乾燥を行うことができ、その結果、APMの乾燥
時間を短縮することができる。
In the present invention, since the drying is carried out by the vibration fluidized drying, it is possible to carry out the uniform drying under the extremely stable vibration state, and as a result, the drying time of the APM can be shortened. You can

【0013】本発明に於ては、乾燥は1時間以内で終了
することができる。乾燥温度を50℃以上の場合には、
徐々にI型からII型に変化するが、乾燥時間1時間以
内であればその変化は少なく実質上問題無い。さらに、
II型結晶への転移を極力押さえる為に、乾燥時間は好
ましくは30分以内がよい。
In the present invention, the drying can be completed within 1 hour. If the drying temperature is above 50 ℃,
Although it gradually changes from type I to type II, if the drying time is within 1 hour, the change is small and there is practically no problem. further,
In order to suppress the transition to the type II crystal as much as possible, the drying time is preferably 30 minutes or less.

【0014】[0014]

【実施例】以下、本発明を実施例により更に詳しく説明
するが、本発明はこれら実施例に限定されるものではな
い。 実施例1 水分50重量%含んだAPMを、押し出し造粒機の圧力
30kg/cm2、スクリーン孔径2mm、長さ2mm
で押し出し造粒して造粒物を得た。得られた湿APM造
粒物を70℃の熱風を用いた振動流動乾燥機で14分乾
燥を行った。これを粉砕機で粉砕し、篩い分けして20
〜80meshのAPM顆粒を得た。得られたAPM顆
粒の結晶型をCuKα線を用いた粉末X線回折法で測定
し、更に溶解速度も測定し、これらの条件及び結果を第
1表(表1)に示した。また、APMの誘導体であるジ
ケトピペラジンの増加も見られなかった。
EXAMPLES The present invention will be described in more detail with reference to examples below, but the present invention is not limited to these examples. Example 1 APM containing 50% by weight of water was used, the pressure of an extrusion granulator was 30 kg / cm 2 , the screen hole diameter was 2 mm, and the length was 2 mm.
The mixture was extruded and granulated to obtain a granulated product. The obtained wet APM granulation product was dried for 14 minutes by a vibration fluidized dryer using hot air at 70 ° C. This is crushed with a crusher and sieved to 20
~ 80 mesh APM granules were obtained. The crystal form of the obtained APM granules was measured by the powder X-ray diffraction method using CuKα ray, and the dissolution rate was also measured. These conditions and results are shown in Table 1 (Table 1). In addition, no increase in diketopiperazine, which is a derivative of APM, was observed.

【0015】溶解速度試験 APM0.05gを60℃、150mlの温水中に攪拌
しながら(マグネチックスターラー、300rpm)に
投入し、水中に溶解するまでの時間を測定する。
Dissolution rate test 0.05 g of APM is added to 150 ml of warm water at 60 ° C. with stirring (magnetic stirrer, 300 rpm), and the time until dissolution in water is measured.

【0016】実施例2〜4 既知量の水分を含んだAPMを、実施例1と同様な操作
を行い、APM顆粒を得た。得られたAPM顆粒の結晶
型をX線回折で調べ、更に溶解速度も測定し、これらの
条件及び結果を第1表(表1)に示した。また、APM
の誘導体であるジケトピペラジンの増加も見られなかっ
た。
Examples 2 to 4 APM containing a known amount of water was treated in the same manner as in Example 1 to obtain APM granules. The crystal form of the obtained APM granules was examined by X-ray diffraction, and the dissolution rate was also measured. These conditions and results are shown in Table 1 (Table 1). Also, APM
The increase of diketopiperazine, which is a derivative of A.

【0017】比較例1 水分45重量%含んだAPMを、押し出し造粒機の圧力
30kg/cm2、スクリーン孔径2mm、長さ2mm
で押し出し造粒して造粒物を得た。得られた湿APM造
粒物を70℃の熱風を用いた熱風乾燥機で24時間乾燥
を行った。これを粉砕機で粉砕し、篩い分けして20〜
80meshのAPM顆粒を得た。得られたAPM顆粒
の結晶型は、II型が主であり、また、この顆粒品の溶
解時間は18分であった。更にAPMの誘導体であるジ
ケトピペラジンの増加も見られなかった。
Comparative Example 1 APM containing 45% by weight of water was used, the pressure of an extrusion granulator was 30 kg / cm 2 , the screen hole diameter was 2 mm, and the length was 2 mm.
The mixture was extruded and granulated to obtain a granulated product. The obtained wet APM granulated product was dried for 24 hours with a hot air dryer using hot air at 70 ° C. This is crushed with a crusher and sieved to 20 ~
80 mesh APM granules were obtained. The crystal form of the obtained APM granules was mainly type II, and the dissolution time of this granule product was 18 minutes. Furthermore, no increase in diketopiperazine, which is a derivative of APM, was observed.

【0018】[0018]

【表1】 [Table 1]

【0019】[0019]

【発明の効果】本発明方法によれば、 (1)50℃以上の乾燥温度で短時間に乾燥することが
できることから設備は小さく、かつシンプルとなる。 (2)空気湿度の調整が必要ないことから運転操作が容
易である。 (3)局部加熱や乾燥ムラが少ない。 (4)連続大量乾燥が可能である。 等のメリットを生じることから、溶解性に優れた効率的
なAPMの製造に大きく寄与するものである。
According to the method of the present invention, (1) equipment can be made small and simple because it can be dried at a drying temperature of 50 ° C. or higher in a short time. (2) Since it is not necessary to adjust the air humidity, the operation is easy. (3) Local heating and uneven drying are small. (4) Continuous large-scale drying is possible. Since it produces such merits, it greatly contributes to efficient production of APM with excellent solubility.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 神野 嘉嗣 福岡県大牟田市浅牟田町30 三井東圧化学 株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshitsugu Jinano 30 Asamu-cho, Omuta-shi, Fukuoka Mitsui Toatsu Chemical Co., Ltd.

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 水分を含んだL−α−アスパルチル−L
−フェニルアラニンメチルエステルの乾燥を、振動流動
乾燥により行うことを特徴とするL−α−アスパルチル
−L−フェニルアラニンメチルエステルの製造法。
1. L-α-Aspartyl-L containing water
-A method for producing L-α-aspartyl-L-phenylalanine methyl ester, characterized in that drying of phenylalanine methyl ester is carried out by vibration fluidized drying.
【請求項2】 水分を含んだL−α−アスパルチル−L
−フェニルアラニンメチルエステルが粒径0.3〜5m
mに造粒したものであることを特徴とする請求項1記載
の製造法。
2. L-α-Aspartyl-L containing water
-Phenylalanine methyl ester has a particle size of 0.3-5 m
The method according to claim 1, which is a granulated product of m.
【請求項3】 乾燥温度が、80℃以下であることを特
徴とする請求項1記載の製造法。
3. The method according to claim 1, wherein the drying temperature is 80 ° C. or lower.
JP4189504A 1992-07-16 1992-07-16 Production of l-alpha-aspartyl-l-phenylalanine methyl ester Pending JPH0641190A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4189504A JPH0641190A (en) 1992-07-16 1992-07-16 Production of l-alpha-aspartyl-l-phenylalanine methyl ester

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4189504A JPH0641190A (en) 1992-07-16 1992-07-16 Production of l-alpha-aspartyl-l-phenylalanine methyl ester

Publications (1)

Publication Number Publication Date
JPH0641190A true JPH0641190A (en) 1994-02-15

Family

ID=16242381

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4189504A Pending JPH0641190A (en) 1992-07-16 1992-07-16 Production of l-alpha-aspartyl-l-phenylalanine methyl ester

Country Status (1)

Country Link
JP (1) JPH0641190A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010064721A1 (en) 2008-12-05 2010-06-10 帝人化成株式会社 Optical films

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010064721A1 (en) 2008-12-05 2010-06-10 帝人化成株式会社 Optical films

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