JPS63101402A - Purification of galactomannan - Google Patents

Purification of galactomannan

Info

Publication number
JPS63101402A
JPS63101402A JP24538786A JP24538786A JPS63101402A JP S63101402 A JPS63101402 A JP S63101402A JP 24538786 A JP24538786 A JP 24538786A JP 24538786 A JP24538786 A JP 24538786A JP S63101402 A JPS63101402 A JP S63101402A
Authority
JP
Japan
Prior art keywords
galactomannan
crude
aqueous solution
added
earth metal
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.)
Granted
Application number
JP24538786A
Other languages
Japanese (ja)
Other versions
JPH05401B2 (en
Inventor
Mitsuo Morikawa
光雄 森川
Hideki Yoshii
秀樹 吉井
Mutsumi Abe
阿部 睦美
Hirofumi Ninomiya
弘文 二宮
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.)
Mitsubishi Acetate Co Ltd
Original Assignee
Mitsubishi Acetate Co Ltd
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 Mitsubishi Acetate Co Ltd filed Critical Mitsubishi Acetate Co Ltd
Priority to JP24538786A priority Critical patent/JPS63101402A/en
Publication of JPS63101402A publication Critical patent/JPS63101402A/en
Publication of JPH05401B2 publication Critical patent/JPH05401B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE:To obtain galactomannan of excellent transparency, by filtering off undissolved substances from an aqueous crude gelactomannan solution containing an alkeline earth metal salt. CONSTITUTION:At aqueous solution of galactomannan is obtained by dispersing 1pt.wt. crude galactomannan obtained by removing seed coats and gears from seeds containing galactomannan and 0.02-1.0g equivalent, per kg of galactomannan, of an alkaline earth metal salt (e.g., CaCl2) in 70-125pts.wt. water at bout 20 deg.C and heating the dispersion to 70-100 deg.C with agitation. 0.5-1.5% filter aid (e.g., pearlite) is added to this aqueous solution to filter off undissolved substances and a hydrophilic organic solvent (e.g., methanol) is added to the solution to precipitate and recover galactomannan.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明はガラクトマンナンの精製法に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to a method for purifying galactomannan.

ガラクトマンナンはマンノースな構成単位とする主鎖に
ガラクトース単位が側鎖として構成される中性多糖類で
あり、主として豆科植物の種子の胚乳部に多(含有され
ている。グア豆を原料とするグアガム、タラ豆を原料と
するタラガム及びローカストビーンを原料とするローカ
ストビーンガムは代表的なガラクトマンナンを主成分と
する植物ガム質である。
Galactomannan is a neutral polysaccharide composed of a main chain consisting of mannose units and galactose units as side chains, and is mainly contained in the endosperm of seeds of leguminous plants. Guar gum, tara gum made from cod beans, and locust bean gum made from locust beans are representative vegetable gums containing galactomannan as a main component.

ガラクトマンナンは水に溶解したときに、きわめて高い
粘性を有し、その水溶液はpH安定性及び共存塩安定性
に優れており、食品分野を中心に捺染、糊料等の諸工業
にも広く利用されている。
Galactomannan has extremely high viscosity when dissolved in water, and its aqueous solution has excellent pH stability and coexisting salt stability, and is widely used in various industries such as textile printing and starch, mainly in the food field. has been done.

しかし通常のガラクトマンナンは、胚乳部の摘出に際し
て種皮、胚芽部(蛋白質、油分、繊維質)等の不純物が
混入するので、透明性及び品質安定性が劣ったものにな
る。そのため高純度、高透明性等の高度な品質を要求さ
れる用途においては精製ガラクトマンナンが要望されて
いる。
However, normal galactomannan has poor transparency and quality stability because impurities such as seed coat and germ (protein, oil, fiber) are mixed in when the endosperm is extracted. Therefore, purified galactomannan is required for applications that require high quality such as high purity and high transparency.

〔従来の技術〕[Conventional technology]

ガラクトマンナンの精製法としては、通常粗製ガラクト
マンナンを熱水溶解したのち、蛋白質、繊維質等の不溶
解物質をf過除去し、f液にメタノール、イソプロピル
アルコール、アセトン等の水親和性有機溶剤を加えてガ
ム質を析出させ、これを回収して乾燥、粉砕する方法が
用いられている。
Galactomannan is usually purified by dissolving crude galactomannan in hot water, removing insoluble substances such as proteins and fibers by filtration, and adding a water-compatible organic solvent such as methanol, isopropyl alcohol, or acetone to the liquid. is added to precipitate a gummy substance, which is then collected, dried, and crushed.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

しかし前記の工程においては、熱水溶解して得たガラク
トマンナン水溶液中に微細な粒子となった蛋白質等の不
溶解物質が含まれ、これが充分に除去できないため、水
溶液の透明性に優れた精製ガラクトマンナンが得られな
いという問題がある。またこの微細な不溶解物質をr過
によって除去するためには微小粒径のr過助剤を大量に
用い、さらにごく目開きの細かいr布を用いるか、何度
もf過を繰り返さなければならず生産性が低下する等の
問題点があり、より簡便に透明性の優れたガラクトマン
ナンを得る方法が要望されていた。
However, in the above process, the galactomannan aqueous solution obtained by dissolving in hot water contains insoluble substances such as proteins in the form of fine particles, which cannot be removed sufficiently. There is a problem that galactomannan cannot be obtained. In addition, in order to remove these fine insoluble substances by r-filtration, it is necessary to use a large amount of r-filtering agent with a fine particle size, use a r-cloth with very fine openings, or repeat f-filtration many times. However, there are problems such as a decrease in productivity, and there has been a need for a simpler method for obtaining galactomannan with excellent transparency.

〔問題点を解決するための手段〕[Means for solving problems]

本発明者らは前記の状況に鑑み、生産性を低下させるこ
となく透明性に優れた精製ガラクトマンナンを得るべく
鋭意検討した結果、本発明に到達した。
In view of the above-mentioned situation, the present inventors conducted intensive studies to obtain purified galactomannan with excellent transparency without reducing productivity, and as a result, they arrived at the present invention.

本発明は、アルカリ土類金属塩を含有する粗製ガラクト
マンナンの水溶液から不溶解物質を炉去し、Filから
ガラクトマンナンを回収することを特徴とする、ガラク
トマンナンの精製法である。
The present invention is a method for purifying galactomannan, which is characterized by removing insoluble substances from an aqueous solution of crude galactomannan containing an alkaline earth metal salt, and recovering galactomannan from a filtrate.

本発明に用いられる粗製ガラクトマンナンとしては、ガ
ラクトマンナン含有種子から種皮や胚芽部を大まかに除
去して粉砕したものでもよく、あるいは不純物をある程
度除去し粗精製した粉砕品でもよい。グアガム、タラガ
ム、ローカストビーンガム等の市販品を用いることもで
きる。
The crude galactomannan used in the present invention may be obtained by roughly removing the seed coat and germ from a galactomannan-containing seed and pulverizing it, or it may be a pulverized product obtained by removing impurities to some extent and roughly refining it. Commercially available products such as guar gum, tara gum, and locust bean gum can also be used.

本発明を実施するに際しては、まずアルカリ土類金属塩
を含有する粗製ガラクトマンナンの水溶液を調製する。
In carrying out the present invention, first, an aqueous solution of crude galactomannan containing an alkaline earth metal salt is prepared.

粗製ガラクトマンナンを溶解させる水としては、70〜
100℃の熱水が用いられる。熱水の使用量は粗製ガラ
クトマンナン1部に対して70〜125部である。熱水
に溶解させる方法としては、まず粗製ガラクトマンナン
粉体な20℃前後の冷水中に充分に攪拌して分散させ、
攪拌を継続しながら所定の温度まで加温して溶解する方
法、又は所定の温度に保持した熱水を攪拌しながら徐々
に粗製ガラクトマンナン粉体を添加して溶解させる方法
があげられる。
The water for dissolving crude galactomannan is 70~
100°C hot water is used. The amount of hot water used is 70 to 125 parts per part of crude galactomannan. To dissolve it in hot water, first, the crude galactomannan powder is thoroughly stirred and dispersed in cold water at around 20°C.
Examples include a method in which crude galactomannan powder is gradually added to and dissolved in hot water maintained at a predetermined temperature while stirring, or a method in which crude galactomannan powder is gradually added to and dissolved in hot water maintained at a predetermined temperature.

本発明に用いられるアルカリ土類金属塩としては、水溶
性のものであればどのようなものでもよいが、カルシウ
ム塩、マグネシウム塩特に塩化カルシウム、塩化マグネ
シウムが好ましい。
The alkaline earth metal salt used in the present invention may be any water-soluble salt, but calcium salts and magnesium salts are preferred, particularly calcium chloride and magnesium chloride.

アルカリ土類金属塩の添加量は、粗製ガラクトマンナン
1 kgに対し、カルシウム、マグネシウム換算として
0.02〜1.0g当量が好ましい。
The amount of alkaline earth metal salt added is preferably 0.02 to 1.0 g equivalent in terms of calcium and magnesium per 1 kg of crude galactomannan.

添加量をこれより多くしても格別の効果はなく、得られ
る精製ガラクトマンナン水溶液の透、明性が低下する傾
向を生ずる。また添加量がこれより少ないと透明性向上
効果が充分でない。アルカリ土類金属塩は、粗製ガラク
トマンナンと一緒に水に溶解してもよく、粗製ガラクト
マンナンの溶解前又は溶解後に加えてもよい。
Even if the amount added is larger than this, there is no particular effect, and the transparency and brightness of the purified galactomannan aqueous solution obtained tend to decrease. Furthermore, if the amount added is less than this, the effect of improving transparency will not be sufficient. The alkaline earth metal salt may be dissolved in water together with the crude galactomannan, or may be added before or after dissolving the crude galactomannan.

次いでアルカリ土類金属塩を含有するガラクトマンナン
水溶液をr遇する。r過は70℃以上の温度で行うこと
が好ましい。温度が下がると水溶液の粘度が高くなり、
r過性が悪化し生産性が低下するので好ましくない。r
遇する際にはr過助剤例えばパーライトを水溶液に対し
て0.5〜1.5%添加し、フィルタープレスでケーキ
層が充分に形成されたのち、P液を取り出す方法を用い
ることもできる。
Then, an aqueous galactomannan solution containing an alkaline earth metal salt is added. The filtration is preferably carried out at a temperature of 70°C or higher. As the temperature decreases, the viscosity of the aqueous solution increases,
This is not preferable because it deteriorates the r-permeability and reduces productivity. r
If necessary, a method can be used in which a super-aiding agent such as perlite is added in an amount of 0.5 to 1.5% to the aqueous solution, and the P solution is taken out after a cake layer is sufficiently formed using a filter press. .

こうして得られた不純物を戸別した水溶液からガラクト
マンナンを回収する方法としては、メタノール、イソプ
ロピルアルコール、アセトン等の水親和性有機溶剤を添
加して沈殿を形成させ、これを回収する方法が用いられ
る。
As a method for recovering galactomannan from the aqueous solution from which the impurities thus obtained are removed, a method is used in which a water-friendly organic solvent such as methanol, isopropyl alcohol, or acetone is added to form a precipitate, and then the precipitate is recovered.

〔発明の効果〕〔Effect of the invention〕

本発明方法によれば、従来法に比較して、生産性を低下
させることなく、水溶液透明性の優れた精製ガラクトマ
ンナンを得ることができる。
According to the method of the present invention, purified galactomannan with excellent aqueous solution transparency can be obtained without reducing productivity as compared to conventional methods.

下記実施例において製品の水溶液透明度は、精製ガラク
トマンナン4.0Iをイオン交換水4(30rrtに冷
水分散し、80℃で1時間攪拌して溶解し、水分補正し
て正確に全量400Iとしたものを25°Cに冷却して
サンプル液とし、分光光度計による6 60 nmでの
蒸留水を対照とした透過率(T%)で示す。
In the examples below, the aqueous solution clarity of the product was determined by dispersing purified galactomannan 4.0 I in cold water at 4 ml (30 rrt) of ion-exchanged water, dissolving it by stirring at 80°C for 1 hour, and correcting the moisture content to make the total amount exactly 400 I. The sample liquid was cooled to 25° C., and the transmittance (T%) at 6 60 nm measured with a spectrophotometer was measured with respect to distilled water.

実施例1 粗製ローカストビーンガム3.5 kg及び塩化カルシ
ウム50gを水300看に分散し、85°Cで1時間攪
拌して溶解したのち、「過助剤のパーライト3.7 k
yを添加混合し、フィルタープレスで加圧濾過した。こ
のときの平均濾過速度は1.6−e/分・m2であった
。次いでr液に同容量のイソプロピルアルコールを添加
して生成した沈殿を圧搾脱水し、乾燥、粉砕して精製ロ
ーカストビーンガムを得た。本命の水溶液透明度は97
、0%であった。
Example 1 3.5 kg of crude locust bean gum and 50 g of calcium chloride were dispersed in 300 g of water and stirred at 85°C for 1 hour to dissolve.
y was added and mixed, and filtered under pressure using a filter press. The average filtration rate at this time was 1.6-e/min·m2. Next, the same volume of isopropyl alcohol was added to the r liquid, and the resulting precipitate was dehydrated by pressing, dried, and ground to obtain purified locust bean gum. The favorite aqueous solution clarity is 97
, 0%.

実施例2 粗製ローカストビーンガム3.5 ky及び塩化マグネ
シウム100gを水300沼に分散し、85°Cで1時
間攪拌して溶解したのち、実施例1と同様に濾過した。
Example 2 3.5 ky of crude locust bean gum and 100 g of magnesium chloride were dispersed in 300 g of water, stirred at 85°C for 1 hour to dissolve, and then filtered in the same manner as in Example 1.

このときの平均濾過速度は1、’!r−e/分・m2で
あった。次いで実施例1と同様に操作して精製品を得た
。この製品の水溶液透明度は97.5%であった。
The average filtration rate at this time is 1,'! It was r-e/min·m2. Then, the same procedure as in Example 1 was carried out to obtain a purified product. The aqueous solution transparency of this product was 97.5%.

比較例1 粗製ローカストビーンガム6.5 kgを水3002に
分散し、85℃で1時間攪拌して溶解したのち、実施例
1と同様に濾過した。このときの平均「過速度は1.3
47分・m2であった。次いで実施例1と同様に操作し
て精製品を得た。この製品の水溶液透明度は95.0%
であり実施例1及び2に比べて劣っていた。
Comparative Example 1 6.5 kg of crude locust bean gum was dispersed in water 3002, stirred at 85° C. for 1 hour to dissolve, and then filtered in the same manner as in Example 1. The average "overspeed" at this time was 1.3
It was 47 minutes/m2. Then, the same procedure as in Example 1 was carried out to obtain a purified product. The aqueous solution transparency of this product is 95.0%
Therefore, it was inferior to Examples 1 and 2.

実施例6 粗製タラガム(富士化学社製スノーガム)3゜5 kg
を水3002会表に分散し、85℃で1時間攪拌して溶
解し、塩化マグネシウム100gを添加したのち実施例
1と同様に濾過した。このときの平均濾過速度は1.2
A/分・m2であった。
Example 6 Crude cod gum (snow gum manufactured by Fuji Chemical Co., Ltd.) 3°5 kg
was dispersed in water 3002, dissolved by stirring at 85° C. for 1 hour, and 100 g of magnesium chloride was added thereto, followed by filtration in the same manner as in Example 1. The average filtration rate at this time is 1.2
It was A/min·m2.

次いで実施例1と同様に操作して精製品を得た。Then, the same procedure as in Example 1 was carried out to obtain a purified product.

この製品の水溶液透明度は98.5%であった。The aqueous solution transparency of this product was 98.5%.

比較例2 実施例3と同様にして得た水溶液に塩化マグネシウムを
添加しないで、実施例1と同様に濾過した。このときの
平均「過速度は1.22/分@m2であった。次いで実
施例1と同様に操作して精製品を得た。この製品の水溶
液透明度は96.0%であり、実施例6に比べて劣って
いた。
Comparative Example 2 An aqueous solution obtained in the same manner as in Example 3 was filtered in the same manner as in Example 1 without adding magnesium chloride. The average overspeed at this time was 1.22/min@m2.Then, the same procedure as in Example 1 was carried out to obtain a purified product.The aqueous solution transparency of this product was 96.0%, and the It was inferior to 6.

Claims (1)

【特許請求の範囲】 1、アルカリ土類金属塩を含有する粗製ガラタトマンナ
ンの水溶液から不溶解物質を濾去し、濾液からガラクト
マンナンを回収することを特徴とする、ガラクトマンナ
ンの精製法。 2、アルカリ土類金属塩が塩化マグネシウム又は塩化カ
ルシウムであることを特徴とする、特許請求の範囲第1
項に記載の方法。
[Scope of Claims] 1. A method for purifying galactomannan, which comprises filtering off insoluble substances from an aqueous solution of crude galatatomannan containing an alkaline earth metal salt and recovering galactomannan from the filtrate. 2. Claim 1, characterized in that the alkaline earth metal salt is magnesium chloride or calcium chloride.
The method described in section.
JP24538786A 1986-10-17 1986-10-17 Purification of galactomannan Granted JPS63101402A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24538786A JPS63101402A (en) 1986-10-17 1986-10-17 Purification of galactomannan

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24538786A JPS63101402A (en) 1986-10-17 1986-10-17 Purification of galactomannan

Publications (2)

Publication Number Publication Date
JPS63101402A true JPS63101402A (en) 1988-05-06
JPH05401B2 JPH05401B2 (en) 1993-01-05

Family

ID=17132901

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24538786A Granted JPS63101402A (en) 1986-10-17 1986-10-17 Purification of galactomannan

Country Status (1)

Country Link
JP (1) JPS63101402A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0686643A1 (en) * 1994-06-09 1995-12-13 Rhone-Poulenc Inc. Guar gum composition and process for making it
US7408057B2 (en) 2000-07-03 2008-08-05 Marine Bioproducts Intenational Clarified hydrocolloids of undiminished properties and method of producing same
US8536325B2 (en) 2009-02-05 2013-09-17 Alcon Research, Ltd. Process for purifying guar
US9175249B2 (en) 2009-07-07 2015-11-03 Alcon Research, Ltd. Ethyleneoxide butyleneoxide block copolymer compositions

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0686643A1 (en) * 1994-06-09 1995-12-13 Rhone-Poulenc Inc. Guar gum composition and process for making it
US7408057B2 (en) 2000-07-03 2008-08-05 Marine Bioproducts Intenational Clarified hydrocolloids of undiminished properties and method of producing same
US8536325B2 (en) 2009-02-05 2013-09-17 Alcon Research, Ltd. Process for purifying guar
US9175249B2 (en) 2009-07-07 2015-11-03 Alcon Research, Ltd. Ethyleneoxide butyleneoxide block copolymer compositions

Also Published As

Publication number Publication date
JPH05401B2 (en) 1993-01-05

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