JP2005320187A - Method for stabilizing basic aluminum chloride aqueous solution - Google Patents
Method for stabilizing basic aluminum chloride aqueous solution Download PDFInfo
- Publication number
- JP2005320187A JP2005320187A JP2004138117A JP2004138117A JP2005320187A JP 2005320187 A JP2005320187 A JP 2005320187A JP 2004138117 A JP2004138117 A JP 2004138117A JP 2004138117 A JP2004138117 A JP 2004138117A JP 2005320187 A JP2005320187 A JP 2005320187A
- Authority
- JP
- Japan
- Prior art keywords
- aluminum chloride
- basic aluminum
- aqueous solution
- monocarboxylic acid
- acid
- 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
Links
Landscapes
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
Description
本発明は、塩基性塩化アルミニウム水溶液の安定化方法に関する。 The present invention relates to a method for stabilizing a basic aqueous aluminum chloride solution.
塩基性塩化アルミニウムは、式（１）
［Ａｌ2（ＯＨ）6-nＣｌn］m （１）
〔式中、ｎは０を超え６未満の数を示し、ｍは自然数を示す。〕
で示される化合物であって、その水溶液は、浄水場、排水処理場などで凝集剤として用いられるほか、近年では精密化学品の原材料としても広く用いられている。
Basic aluminum chloride has the formula (1)
[Al 2 (OH) 6-n Cl n ] m (1)
[Wherein, n represents a number exceeding 0 and less than 6, and m represents a natural number. ]
In addition to being used as a flocculant in water purification plants, wastewater treatment plants and the like, the aqueous solution thereof is also widely used as a raw material for fine chemicals in recent years.
しかし、塩基性塩化アルミニウム水溶液は不安定で、加熱濃縮したり、長期間保管すると、縮重合や加水分解により不溶成分が生じ易い。 However, the basic aluminum chloride aqueous solution is unstable, and when heated and concentrated or stored for a long period of time, insoluble components are likely to be generated due to condensation polymerization or hydrolysis.
塩基性塩化アルミニウム水溶液を安定化させる方法として、特許文献１〔特開昭５２−９９９９４号公報〕には、ポリカルボン酸を添加する方法が開示されているが、必ずしも十分に安定化させ得るものではなかった。 As a method of stabilizing a basic aluminum chloride aqueous solution, Patent Document 1 (Japanese Patent Laid-Open No. 52-99994) discloses a method of adding a polycarboxylic acid. It wasn't.
そこで本発明者は、塩基性塩化アルミニウム水溶液を十分に安定化させ得る方法を開発するべく鋭意検討した結果、塩基性塩化アルミニウム水溶液の安定化に十分な効果があることを見出し、本発明に至った。 Thus, as a result of intensive studies to develop a method capable of sufficiently stabilizing a basic aluminum chloride aqueous solution, the present inventors have found that the basic aluminum chloride aqueous solution has a sufficient effect for stabilizing the basic aluminum chloride aqueous solution, leading to the present invention. It was.
すなわち本発明は、塩基性塩化アルミニウム水溶液にモノカルボン酸を添加することを特徴とする塩基性塩化アルミニウム水溶液の安定化方法を提供するものである。 That is, the present invention provides a method for stabilizing a basic aluminum chloride aqueous solution, which comprises adding a monocarboxylic acid to the basic aluminum chloride aqueous solution.
本発明の安定化方法によれば、塩基性塩化アルミニウム水溶液を十分に安定化させて、不溶成分の生成を防止することができる。 According to the stabilization method of the present invention, it is possible to sufficiently stabilize the basic aluminum chloride aqueous solution and prevent the generation of insoluble components.
本発明の安定化方法に適用される塩基性塩化アルミニウム水溶液は、前記式（１）で示される塩基性塩化アルミニウムが水に溶解してなる水溶液である。塩基性塩化アルミニウム水溶液における塩基性塩化アルミニウムの含有量は、酸化物（Ａｌ2Ｏ3）換算のアルミニウム含有量として、通常５重量％〜３０重量％程度である。 The basic aluminum chloride aqueous solution applied to the stabilization method of the present invention is an aqueous solution in which the basic aluminum chloride represented by the formula (1) is dissolved in water. The content of basic aluminum chloride in the basic aluminum chloride aqueous solution is usually about 5% by weight to 30% by weight as the aluminum content in terms of oxide (Al 2 O 3 ).
この水溶液に含まれる塩基性塩化アルミニウムの塩基度は、式（２）
塩基度 ＝〔（６−ｎ）／６〕× １００ （２）
〔式中、ｎは前記と同じ意味を示す。〕
で示されるが、本発明の安定化方法は、塩基度が通常４０以上、好ましくは８０以上の塩基性塩化アルミニウム水溶液に適用される。
The basicity of the basic aluminum chloride contained in this aqueous solution is expressed by the formula (2)
Basicity = [(6-n) / 6] × 100 (2)
[Wherein n represents the same meaning as described above. ]
The stabilization method of the present invention is applied to a basic aluminum chloride aqueous solution having a basicity of usually 40 or more, preferably 80 or more.
本発明の安定化方法で使用されるモノカルボン酸は、分子内に１個のカルボキシル基を有する化合物であって、例えばギ酸、酢酸、プロピオン酸、酪酸、吉草酸などの脂肪族モノカルボン酸が挙げられる。また、モノカルボン酸は、さらに水酸基を有するオキシモノカルボン酸であってもよい。オキシモノカルボン酸としては、例えばαヒドロキシ酢酸、乳酸、αオキシ酪酸などのような、水酸基がカルボキシル基と同じ炭素原子に置換しているα−オキシモノカルボン酸が好ましく用いられる。 The monocarboxylic acid used in the stabilization method of the present invention is a compound having one carboxyl group in the molecule. For example, aliphatic monocarboxylic acids such as formic acid, acetic acid, propionic acid, butyric acid, and valeric acid Can be mentioned. The monocarboxylic acid may be an oxymonocarboxylic acid having a hydroxyl group. As the oxymonocarboxylic acid, α-oxymonocarboxylic acid having a hydroxyl group substituted with the same carbon atom as the carboxyl group, such as α-hydroxyacetic acid, lactic acid, α-oxybutyric acid and the like, is preferably used.
モノカルボン酸は遊離酸であってもよいし、塩とであってもよい。モノカルボン酸の塩としては、例えばナトリウム塩などのアルカリ金属塩、マグネシウム塩などのアルカリ土類金属塩などのような無機塩、アンモニウム塩などのような有機塩などが挙げられる。 The monocarboxylic acid may be a free acid or a salt. Examples of the salt of monocarboxylic acid include inorganic salts such as alkali metal salts such as sodium salts, alkaline earth metal salts such as magnesium salts, and organic salts such as ammonium salts.
モノカルボン酸の使用量は、酸化物（Ａｌ2Ｏ3）換算の塩基性塩化アルミニウム１００重量部あたり通常０．５重量部以上、好ましくは１重量部以上であり、使用量に見合った効果が得られず経済的に不利になることから、通常は５０重量部以下である。 The amount of monocarboxylic acid used is usually 0.5 parts by weight or more, preferably 1 part by weight or more per 100 parts by weight of basic aluminum chloride in terms of oxide (Al 2 O 3 ). Since it is not obtained and it is economically disadvantageous, it is usually 50 parts by weight or less.
塩基性塩化アルミニウム水溶液にモノカルボン酸を添加する方法は特に限定されるものではなく、例えば塩基性塩化アルミニウム水溶液をモノカルボン酸と混合すればよい。モノカルボン酸の中には結晶水その他の水分を含んだ状態で入手可能なものもあるが、このような水分を含むモノカルボン酸を使用する場合には、脱水してから使用してもよいし、脱水することなく水分を含むまま使用してもよい。塩基性塩化アルミニウム水溶液に添加されたモノカルボン酸は、該水溶液中で完全に溶解していることが好ましい。 The method for adding the monocarboxylic acid to the basic aluminum chloride aqueous solution is not particularly limited. For example, the basic aluminum chloride aqueous solution may be mixed with the monocarboxylic acid. Some monocarboxylic acids are available in a state containing water of crystallization or other moisture, but when using such a monocarboxylic acid containing moisture, it may be used after dehydration. However, it may be used while containing moisture without dehydration. The monocarboxylic acid added to the basic aluminum chloride aqueous solution is preferably completely dissolved in the aqueous solution.
塩基性塩化アルミニウム水溶液にモノカルボン酸を溶解させることにより、水に塩基性塩化アルミニウムおよびモノカルボン酸が溶解されてなる組成物が得られるが、この組成物は、十分に安定であり、加熱下や、長期間に亙る保存中にも不溶成分が生成しない。 By dissolving monocarboxylic acid in basic aluminum chloride aqueous solution, a composition in which basic aluminum chloride and monocarboxylic acid are dissolved in water can be obtained. In addition, insoluble components are not generated during storage for a long period of time.
以下、実施例によって本発明をより詳細に説明するが、本発明は、かかる実施例によって限定されるものではない。 EXAMPLES Hereinafter, although an Example demonstrates this invention in detail, this invention is not limited by this Example.
なお、以下の各実施例において、アルミニウム含有量および塩基度は以下の方法で求めた。
(1)アルミニウム含有量は、ＪＩＳ Ｋ １４７５(1996)の滴定法により酸化物（Ａｌ2Ｏ3）換算で求めた。
(2)塩基度は、ホルハルト（Ｖｏｌｈａｒｄ）法により塩素（Ｃｌ）含有量〔ＣCl〕を求め、この塩素含有量〔ＣCl〕と、酸化物換算で求めた上記アルミニウム含有量〔ＣAl〕とから式（３）
(1) The aluminum content was determined in terms of oxide (Al 2 O 3 ) by the titration method of JIS K 1475 (1996).
(2) The basicity is determined by calculating the chlorine (Cl) content [C Cl ] by the Forhard method, the chlorine content [C Cl ], and the aluminum content [C Al ] determined in terms of oxides. And equation (3)
実施例１
朝日化学工業(株)製の塩基性塩化アルミニウム水溶液〔アルミニウム含有量２４重量％、塩基度は８３〕１００ｇに乳酸〔昭和加工(株)製、水分含有量１０重量％〕２．２ｇ（乳酸純分は２ｇ）を加え、攪拌して溶解させて、水に塩基塩化アルミニウムおよび乳酸が溶解された液状の組成物を得た。この組成物を大気中で加熱し、煮沸して濃縮したところ、アルミニウム含有量２９重量％まで濃縮しても、この組成物中に沈殿物や白濁は見られず、また液面に不溶成分の皮膜が生成することもなかった。また、このときの粘度は７００ｃｐ（７００ｍＰａ・ｓ）であった。
Example 1
100 g of basic aluminum chloride aqueous solution manufactured by Asahi Chemical Industry Co., Ltd. [aluminum content: 24% by weight, basicity: 83], 2.2 g of lactic acid (Showa Processing Co., Ltd., water content: 10% by weight) 2 g) was added and dissolved by stirring to obtain a liquid composition in which basic aluminum chloride and lactic acid were dissolved in water. When this composition was heated in the air, boiled and concentrated, even if it was concentrated to an aluminum content of 29% by weight, no precipitate or cloudiness was observed in this composition, and there was no insoluble component on the liquid surface. A film was not formed. Further, the viscosity at this time was 700 cp (700 mPa · s).
実施例２
乳酸に代えて蟻酸〔広栄化学工業(株)製、水分含有量１０重量％〕２．２ｇ（蟻酸純分は２ｇ）を加えた以外は実施例１と同様に操作して、液状の組成物を得、この組成物を大気中で加熱し、煮沸して濃縮したところ、アルミニウム含有量２９重量％まで濃縮しても、この組成物中に沈殿物や白濁は見られず、また液面に不溶成分の皮膜が生成することもなかった。また、このときの粘度は２１００ｃｐ（２１００ｍＰａ・ｓ）であった。
Example 2
A liquid composition was prepared in the same manner as in Example 1 except that 2.2 g of formic acid (manufactured by Guangei Chemical Industry Co., Ltd., water content: 10% by weight) was added instead of lactic acid. When this composition was heated in the air, boiled and concentrated, even if it was concentrated to an aluminum content of 29% by weight, no precipitate or cloudiness was observed in the composition, and A film of insoluble components was not generated. The viscosity at this time was 2100 cp (2100 mPa · s).
実施例３
乳酸に代えてαヒドロキシ酢酸〔関東化学(株)製試薬、水分含有量３０重量％〕２．９ｇ（αヒドロキシ酢酸純分は２ｇ）を加えた以外は、実施例１と同様に操作して、液状の組成物を得、この組成物を大気中で加熱し、煮沸して濃縮したところ、アルミニウム含有量２９重量％まで濃縮しても、この組成物中に沈殿物や白濁は見られず、また液面に不溶成分の皮膜が生成することもなかった。また、このときの粘度は３６００ｃｐ（３６００ｍＰａ・ｓ）であった。
Example 3
The same operation as in Example 1 was carried out except that 2.9 g of α-hydroxyacetic acid (a reagent manufactured by Kanto Chemical Co., Ltd., water content 30 wt%) was added in place of lactic acid (2 g of α-hydroxyacetic acid was 2 g). A liquid composition was obtained, and the composition was heated in the air, boiled and concentrated. Even when the aluminum content was concentrated to 29% by weight, no precipitate or cloudiness was observed in the composition. Also, no insoluble component film was formed on the liquid surface. Further, the viscosity at this time was 3600 cp (3600 mPa · s).
実施例４
乳酸に代えて酢酸〔関東化学(株)製試薬、純度１００％〕２ｇを加えた以外は、実施例１と同様に操作して液状の組成物を得、この組成物を大気中で加熱し、煮沸して濃縮したところ、アルミニウム含有量２９重量％まで濃縮しても、この組成物中に沈殿物や白濁は見られず、また液面に不溶成分の皮膜が生成することもなかった。また、このときの粘度は６６０ｃｐ（６６０ｍＰａ・ｓ）であった。
Example 4
A liquid composition was obtained in the same manner as in Example 1 except that 2 g of acetic acid (reagent manufactured by Kanto Chemical Co., Inc., purity 100%) was added in place of lactic acid, and this composition was heated in the atmosphere. As a result of boiling and concentration, even when the aluminum content was concentrated to 29% by weight, no precipitate or cloudiness was observed in the composition, and no insoluble component film was formed on the liquid surface. Further, the viscosity at this time was 660 cp (660 mPa · s).
実施例５
乳酸に代えてプロピオン酸〔関東化学(株)製試薬、純度１００％〕２ｇを加えた以外は、実施例１と同様に操作して液状の組成物を得、この組成物を大気中で加熱し、煮沸して濃縮したところ、アルミニウム含有量２９重量％まで濃縮しても、この組成物中に沈殿物や白濁は見られず、また液面に不溶成分の皮膜が生成することもなかった。また、このときの粘度は４５０ｃｐ（４５０ｍＰａ・ｓ）であった。
Example 5
A liquid composition was obtained in the same manner as in Example 1 except that 2 g of propionic acid (a reagent manufactured by Kanto Chemical Co., Inc., purity 100%) was added instead of lactic acid, and this composition was heated in the atmosphere. After boiling and concentrating, even when the aluminum content was concentrated to 29% by weight, no precipitate or cloudiness was observed in the composition, and no insoluble component film was formed on the liquid surface. . Further, the viscosity at this time was 450 cp (450 mPa · s).
比較例１
実施例１で用いたと同じ塩基性塩化アルミニウム水溶液〔アルミニウム含有量２４重量％、塩基度は８３〕１００ｇをそのまま大気中で加熱し、煮沸して濃縮したところ、水溶液の液面に不溶成分が皮膜として生成し始め、アルミニウム含有量２８．３重量％まで濃縮したときには、水溶液全体が固化していた。
Comparative Example 1
When 100 g of the same basic aluminum chloride aqueous solution as used in Example 1 (aluminum content 24 wt%, basicity 83) was heated in the air, boiled and concentrated, an insoluble component was formed on the liquid surface of the aqueous solution. When the aluminum content was concentrated to 28.3% by weight, the entire aqueous solution was solidified.
比較例２
乳酸に代えてクエン酸一水和物〔関東化学(株)製試薬〕２．２ｇを加えた以外は、実施例１と同様に操作して、液状の組成物を得、この組成物を大気中で加熱し、煮沸して濃縮したところ、アルミニウム含有量２８．０重量％を超えたところで、生成した不溶成分のために粘度が急激に上昇し、アルミニウム含有量２８．５重量％まで濃縮したときには、組成物全体が固化した。
Comparative Example 2
A liquid composition was obtained in the same manner as in Example 1 except that 2.2 g of citric acid monohydrate (a reagent manufactured by Kanto Chemical Co., Inc.) was added instead of lactic acid. When heated in water, boiled and concentrated, when the aluminum content exceeded 28.0% by weight, the viscosity increased rapidly due to the insoluble components produced and concentrated to an aluminum content of 28.5% by weight. Sometimes the entire composition solidified.
比較例３
乳酸に代えてリンゴ酸２ｇを加えた以外は、実施例１と同様に操作して、液状の組成物を得、この組成物を大気中で加熱し煮沸して、アルミニウム含有量２９重量％まで濃縮したところ、アルミニウム含有量２８．０重量％を超えたところで、生成した不溶成分のために粘度が急激に上昇し、アルミニウム含有量２８．５重量％まで濃縮したときには、組成物全体が固化した。
Comparative Example 3
Except for adding 2 g of malic acid in place of lactic acid, the same operation as in Example 1 was carried out to obtain a liquid composition, which was heated and boiled in the atmosphere until the aluminum content reached 29% by weight. When concentrated, when the aluminum content exceeded 28.0% by weight, the viscosity increased rapidly due to the insoluble components produced, and when the aluminum content was concentrated to 28.5% by weight, the entire composition was solidified. .
比較例４
乳酸に代えてシュウ酸二水和物〔関東化学(株)製試薬、純度１００％〕２．８ｇを加えた以外は、実施例１と同様に操作して、液状の組成物を得、この組成物を大気中で加熱し、煮沸して濃縮したところ、アルミニウム含有量２８．０重量％を超えたところで、生成した不溶成分のために粘度が急激に上昇し、アルミニウム含有量２８．５重量％まで濃縮したときには、組成物全体が固化した。
Comparative Example 4
A liquid composition was obtained in the same manner as in Example 1 except that 2.8 g of oxalic acid dihydrate (reagent manufactured by Kanto Chemical Co., Inc., purity 100%) was added instead of lactic acid. When the composition was heated in the air, boiled and concentrated, when the aluminum content exceeded 28.0% by weight, the viscosity increased rapidly due to the insoluble components produced, and the aluminum content was 28.5%. When concentrated to%, the entire composition solidified.
実施例６
朝日化学工業(株)製の塩基性塩化アルミニウム水溶液〔アルミニウム分含有量１０．５重量％、塩基度は５０〕１００ｇに、実施例１で用いたと同じ乳酸１ｇ（乳酸純分０．９ｇ）を加え、攪拌して溶解させ、組成物を得、この組成物を大気中で加熱し、沸騰させて、アルミニウム含有量１０．５重量％まで濃縮したのち、室温（約２０℃）まで放冷した。放冷後の組成物には沈殿物や白濁は見られなかった。その後、この組成物を５０℃の恒温室で保存したが、９０日経過後も、沈殿物や白濁は見られず、また液面に不溶成分の皮膜が生成することもなかった。
Example 6
100 g of basic aluminum chloride aqueous solution (aluminum content 10.5 wt%, basicity 50) manufactured by Asahi Chemical Industry Co., Ltd. was added to 1 g of lactic acid (0.9 g of pure lactic acid) used in Example 1. Add and dissolve by stirring to obtain a composition, which is heated in the air, boiled, concentrated to an aluminum content of 10.5% by weight, and then allowed to cool to room temperature (about 20 ° C.). . No precipitate or cloudiness was observed in the composition after cooling. Thereafter, this composition was stored in a thermostatic chamber at 50 ° C., but after 90 days, no precipitate or cloudiness was observed, and no insoluble component film was formed on the liquid surface.
比較例５
実施例６で用いたと同じ塩基性塩化アルミニウム水溶液〔アルミニウム分含有量１０．５重量％、塩基度は５０〕１００ｇをそのまま５０℃の恒温室で保存したところ、７日経過後には沈殿物が生じていた。
Comparative Example 5
When 100 g of the same basic aluminum chloride aqueous solution (aluminum content 10.5 wt%, basicity 50) as used in Example 6 was stored in a thermostatic chamber at 50 ° C., a precipitate was formed after 7 days. It was.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004138117A JP2005320187A (en) | 2004-05-07 | 2004-05-07 | Method for stabilizing basic aluminum chloride aqueous solution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004138117A JP2005320187A (en) | 2004-05-07 | 2004-05-07 | Method for stabilizing basic aluminum chloride aqueous solution |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2005320187A true JP2005320187A (en) | 2005-11-17 |
Family
ID=35467728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2004138117A Pending JP2005320187A (en) | 2004-05-07 | 2004-05-07 | Method for stabilizing basic aluminum chloride aqueous solution |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2005320187A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6186528B1 (en) * | 2017-03-21 | 2017-08-23 | 朝日化学工業株式会社 | Method for producing basic aluminum chloride |
-
2004
- 2004-05-07 JP JP2004138117A patent/JP2005320187A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6186528B1 (en) * | 2017-03-21 | 2017-08-23 | 朝日化学工業株式会社 | Method for producing basic aluminum chloride |
| JP2018154543A (en) * | 2017-03-21 | 2018-10-04 | 朝日化学工業株式会社 | Method for producing basic aluminum chloride |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI481561B (en) | Non-caking salt composition, preparation process and use thereof | |
| JP4961822B2 (en) | Heavy metal treatment agent excellent in low-temperature stability and heavy metal treatment method using the same | |
| JP6429079B2 (en) | Etching solution and etching method | |
| US6472380B1 (en) | Glucosamine sulfate calcium chloride composition and processes for the preparation of glucosamine sulfate metal chlorides | |
| TWI480259B (en) | Process for the preparation of a composition comprising meso-tartaric acid | |
| JP2005320187A (en) | Method for stabilizing basic aluminum chloride aqueous solution | |
| JP2008143794A5 (en) | ||
| JP2015221766A (en) | Composition for slime prevention | |
| JP2716126B2 (en) | Slime control method | |
| AU2006249262B2 (en) | Formulation and method for chlorinating recreational water | |
| US3241929A (en) | Inhibition of calcium sulfate dissolution during brine preparation | |
| JP5228389B2 (en) | Method for reducing odor of aluminum chloride solution | |
| JP4554193B2 (en) | Method for producing and purifying hydroxylamine stabilizer | |
| JP4566642B2 (en) | Method for producing sulfonium compound | |
| JPWO2006018990A1 (en) | Dichloroisocyanurate composition with high storage stability | |
| JP2017088481A (en) | Alumina colloid-containing aqueous solution | |
| JP3960161B2 (en) | Titanium oxide dissolving composition and dissolving method using the same | |
| US8729300B2 (en) | Method for preparing metal salt of valproic acid | |
| JP4079439B2 (en) | Method for producing low bromine inorganic salts | |
| ES2849298T3 (en) | Recovery of carboxylic acid from its magnesium salts by precipitation with hydrochloric acid, useful for making fermentation broths | |
| US20180371379A1 (en) | Aqueous cleaning solution for removal of rouging deposits on media-contacted surfaces of stainless steels, use thereof and process for production thereof | |
| JP2006206608A (en) | Microbicidal and algicidal composition | |
| JP2004284958A (en) | Method of stabilizing n-methyl-2-pyrrolidone, handling method and distillation method | |
| JP2000219511A (en) | Cyanamide aqueous solution | |
| JP3624945B2 (en) | Oxygen scavenger |