JP2010006640A - New synthetic hydrotalcite particles and method for producing the same - Google Patents

New synthetic hydrotalcite particles and method for producing the same Download PDF

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JP2010006640A
JP2010006640A JP2008168100A JP2008168100A JP2010006640A JP 2010006640 A JP2010006640 A JP 2010006640A JP 2008168100 A JP2008168100 A JP 2008168100A JP 2008168100 A JP2008168100 A JP 2008168100A JP 2010006640 A JP2010006640 A JP 2010006640A
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hydrotalcite particles
synthetic hydrotalcite
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magnesium carbonate
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JP5322207B2 (en
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Takafumi Suzuki
隆文 鈴木
Shinjiro Tamagawa
晋二郎 玉川
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Kyowa Chemical Industry Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide synthetic hydrotalcite particles with low bulkiness, specifically hydrotalcite particles which has a columnar shape, has low bulkiness, and can reduce the thickness of a tablet when the particles are formed into a tablet, and to provide a method for producing the same. <P>SOLUTION: An aqueous suspension of strip-shaped basic magnesium carbonate particles and an aqueous suspension of aluminum hydroxide are mixed at a ratio of Mg/Al of 2.6-3.2. Caustic alkali is added to the mixture to obtain a reaction mixture having a pH of 8.5-11.5. The reaction mixture is heated and aged at 50-100°C for 0.5-20 hours to obtain columnar synthetic hydrotalcite particles. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は新規で、特殊な形状、すなわち柱状を有する合成ハイドロタルサイト粒子及びその製法に関する。 The present invention is novel and relates to a synthetic hydrotalcite particle having a special shape, that is, a columnar shape, and a method for producing the same.

合成ハイドロタルサイト粒子は、陰イオン交換による酸の不活性化や優れた酸中和能を有しており、更に、構成元素の置換及び陰イオンの種類を変換できる等の特異な性質を活用し、医薬用制酸剤(特許文献1,2)、吸着剤(特許文献3,4)、ポリオレフィン系樹脂の触媒残分の中和剤(特許文献5)、塩素系樹脂の安定剤(特許文献6)等多岐にわたる分野で利用されている。しかしながら、従来のハイドロタルサイト粒子は、カサが3.0〜6.0mL/gと高いために、作業性や輸送効率が悪く、更に錠剤とした時の厚みが厚くなり服用しにくいという問題があり、カサが低い合成ハイドロタルサイトが求められてきたが、上記課題を解決するまでには至ってない。

特公昭46−2280号公報 特公昭50−30039号公報 特開2004−285485号公報 特開2006−239661号公報 特開昭57−19133号公報 特開昭55−80445号公報
Synthetic hydrotalcite particles have an acid inactivation by anion exchange and excellent acid neutralization ability, and further utilize unique properties such as substitution of constituent elements and conversion of anion types. Pharmaceutical antacids (Patent Documents 1 and 2), adsorbents (Patent Documents 3 and 4), neutralizers for catalyst residues of polyolefin resins (Patent Document 5), stabilizers for chlorine resins (patents) It is used in a wide variety of fields such as Reference 6). However, since conventional hydrotalcite particles have a high bulk of 3.0 to 6.0 mL / g, the workability and transport efficiency are poor, and the thickness of the tablet becomes thick and difficult to take. There has been a demand for synthetic hydrotalcite with low bulk, but it has not yet been solved.

Japanese Examined Patent Publication No. 46-2280 Japanese Patent Publication No. 50-30039 JP 2004-285485 A JP 2006-239661 A JP-A-57-19133 Japanese Patent Laid-Open No. 55-80445

本発明の目的は、カサが低い合成ハイドロタルサイト粒子を提供することである。すなわち、新規形状を有し、カサが低く、特に錠剤にした時の錠剤の厚みを薄く出来るハイドロタルサイト粒子及びその製造方法を提供することである。
An object of the present invention is to provide synthetic hydrotalcite particles with low bulk. That is, it is to provide a hydrotalcite particle having a novel shape, low mass, and particularly capable of reducing the thickness of the tablet when made into a tablet, and a method for producing the same.

前記のように、合成ハイドロタルサイト粒子については多くの検討がなされているが、いづれもカサが高く、特に医薬用制酸剤錠剤用に利用するに当たっては服用しにくいものであった。従って、カサが低く錠剤にした時の錠剤厚みが薄い合成ハイドロタルサイト粒子が嘱望されている。
本発明者らは前記課題を解決するために鋭意研究を重ねた結果、ハイドロタルサイト製造時の原料を特定することにより、目的の合成ハイドロタルサイト粒子が得られることを、すなわち、形状が柱状の合成ハイドロタルサイト粒子が得られ、従来の合成ハイドロタルサイト粒子に比べカサが低く、例えば錠剤とした時の厚みが薄く、更に、比較的安価に目的の合成ハイドロタルサイト粒子が得られることを見出し本発明を完成した。
As described above, many studies have been made on the synthetic hydrotalcite particles, but all of them are high in weight and are particularly difficult to take when used for pharmaceutical antacid tablets. Therefore, synthetic hydrotalcite particles having a low bulk and a thin tablet thickness when formed into tablets are desired.
As a result of intensive studies to solve the above problems, the present inventors have determined that the desired synthetic hydrotalcite particles can be obtained by specifying the raw materials for producing hydrotalcite, that is, the shape is columnar. Synthetic hydrotalcite particles can be obtained, have a lower bulk than conventional synthetic hydrotalcite particles, have a thin thickness when made into tablets, for example, and obtain the desired synthetic hydrotalcite particles relatively inexpensively The present invention has been completed.

本発明で得られた合成ハイドロタルサイト粒子は、下記式化1で表わされる形状が柱状である合成ハイドロタルサイト粒子である。

(式中x、yおよびmは5.2≦x≦6.3,1≦y≦1.5,3≦m≦8を満足する値とする。)
The synthetic hydrotalcite particles obtained in the present invention are synthetic hydrotalcite particles having a columnar shape represented by the following formula 1.

(Wherein x, y, and m are values satisfying 5.2 ≦ x ≦ 6.3, 1 ≦ y ≦ 1.5, and 3 ≦ m ≦ 8)

本発明の形状が柱状である合成ハイドロタルサイト粒子は、日本薬局方外医薬品規格2002年収載規格に適合することを特徴とし、更に、該ハイドロタルサイト粒子はカサが低く、錠剤とした時の厚みが薄いものとなるので制酸剤として有効で、さらにその他利用範囲の広いものとなる。 Synthetic hydrotalcite particles having a columnar shape according to the present invention are characterized by conforming to the Japanese Pharmacopoeia Standards for Drugs Listed in 2002, and the hydrotalcite particles are low in bulk and used as tablets. Since the thickness is small, it is effective as an antacid, and further has a wide range of uses.

本発明の製造方法は、下記である。
〈製造方法〉
本発明の形状が柱状の合成ハイドロタルサイト粒子は以下の工程により製造することができる。
(1)塩基性炭酸マグネシウム粒子の水懸濁液と水酸化アルミニウムの水懸濁液とを、マグネシウム原子とアルミニウム原子との比(Mg/Al)が2.6〜3.2となる割合で混合し、さらに苛性アルカリを加えて該液pH8.5〜11.5の反応液を得る工程、および
(2)反応液を50〜100℃で0.5〜20時間加熱熟成する工程、
(3)熟成後液からハイドロタルサイト粒子を固液分離、洗浄、脱水および乾燥する工程。
The production method of the present invention is as follows.
<Production method>
Synthetic hydrotalcite particles having a columnar shape according to the present invention can be produced by the following steps.
(1) An aqueous suspension of basic magnesium carbonate particles and an aqueous suspension of aluminum hydroxide at a ratio such that the ratio of magnesium atom to aluminum atom (Mg / Al) is 2.6 to 3.2. Mixing, further adding a caustic alkali to obtain a reaction solution having a pH of 8.5 to 11.5, and (2) aging the reaction solution at 50 to 100 ° C. for 0.5 to 20 hours,
(3) A step of solid-liquid separation, washing, dehydration and drying of hydrotalcite particles from the solution after aging.

(反応)
水酸化アルミニウム粒子は、日本薬局方第十五改正適合の乾燥水酸化アルミニウムゲル粒子であり、乾燥品または乾燥前スラリーであってもよい。炭酸マグネシウム粒子は、形状が短冊状であり、長辺の平均長さが10〜100μm、短辺の平均長さが5〜20μm、長辺/短辺比の平均が2〜20であり、さらに日本薬局方第十五改正適合の塩基性炭酸マグネシウムである。長辺の長さについては、特に限定するものではないが10μm以下のものは合成できなく、また100μm以上のものも合成できない。短辺の長さについては5μm以下であれば得られるハイドロタルサイト粒子の形状が柱状にならなく、100μm以上のものは合成できない。
また、用いるマグネシウム原子とアルミニウム原子の混合比率(Mg/Al)2.6〜3.2は、得られたハイドロタルサイト粒子が日本薬局方外医薬品規格のモル比規格に適合する範囲である。
上記苛性アルカリとしては、水酸化ナトリウム、水酸化カリウムおよび水酸化アンモニウムなる群から選ばれる少なくとも1種を用いることが好ましい。
反応pHは、8.5〜11.5、好ましくは9.5〜10.5である。反応pHが8.5以下であると、ハイドロタルサイト生成率が低くなり、また後工程の熟成に多大のエネルギーを必要とするので不利である。逆に反応pH11.5以上では、pH調整のための苛性アルカリの使用量が多大となりこれもまた不利である。
なお、反応温度に関しては特に限定するものでないが、15〜30℃の範囲内であればよい。
(reaction)
The aluminum hydroxide particles are dry aluminum hydroxide gel particles conforming to the 15th revision of the Japanese Pharmacopoeia, and may be a dried product or a slurry before drying. The magnesium carbonate particles have a strip shape, the average length of the long side is 10 to 100 μm, the average length of the short side is 5 to 20 μm, and the average of the long side / short side ratio is 2 to 20, Basic magnesium carbonate compatible with the 15th revision of the Japanese Pharmacopoeia. The length of the long side is not particularly limited, but those having a length of 10 μm or less cannot be synthesized, and those having a length of 100 μm or more cannot be synthesized. If the length of the short side is 5 μm or less, the shape of the obtained hydrotalcite particles does not become a columnar shape, and a particle having a length of 100 μm or more cannot be synthesized.
Moreover, the mixing ratio (Mg / Al) 2.6-3.2 of the magnesium atom and aluminum atom to be used is a range in which the obtained hydrotalcite particles meet the molar ratio standard of the Japanese Pharmacopoeia pharmaceutical standards.
As the caustic alkali, it is preferable to use at least one selected from the group consisting of sodium hydroxide, potassium hydroxide and ammonium hydroxide.
The reaction pH is 8.5 to 11.5, preferably 9.5 to 10.5. If the reaction pH is 8.5 or less, the hydrotalcite production rate is low, and a large amount of energy is required for aging in the subsequent process, which is disadvantageous. On the contrary, when the reaction pH is 11.5 or higher, the amount of caustic used for adjusting the pH becomes large, which is also disadvantageous.
In addition, although it does not specifically limit regarding reaction temperature, What is necessary is just in the range of 15-30 degreeC.

(熟成)
熟成は、得られた反応液を50〜100℃、好ましくは70〜90℃で維持することにより行う。
また、熟成時間は0.5〜20時間、好ましくは1〜3時間である。
(固液分離、洗浄、脱水および乾燥)
熟成後反応液を、ろ過、洗浄、脱水および乾燥させる。
(Aging)
The aging is performed by maintaining the obtained reaction solution at 50 to 100 ° C, preferably 70 to 90 ° C.
The aging time is 0.5 to 20 hours, preferably 1 to 3 hours.
(Solid-liquid separation, washing, dehydration and drying)
After aging, the reaction solution is filtered, washed, dehydrated and dried.

すなわち本発明は、
1.顕微鏡観察下における形状が柱状であり、且つ下記式化2を満足する新規合成ハイドロタルサイト粒子、

(式中x、yおよびmは5.2≦x≦6.3,1≦y≦1.5,3≦m≦8を満足する値とする。)
2.上記柱状粒子の高さが10〜100μm、柱の直径が5〜20μm、高さ/直径の比(アスペクト比)が2〜20である前項1記載の合成ハイドロタルサイト粒子、
3.見掛け比容が2〜3mL/gである前項1記載の合成ハイドロタルサイト粒子、
4.BET法で測定された比表面積が、30〜200m/gである前項1記載の合成ハイドロタルサイト粒子、
5.合成ハイドロタルサイト粒子が、日本薬局方外医薬品規格2002年収載規格に適合する前項1記載の合成ハイドロタルサイト粒子、
6.前項1記載の新規合成ハイドロタルサイト粒子を有効成分とする制酸剤、
7.(1)炭酸マグネシウム粒子の水懸濁液と水酸化アルミニウムの水懸濁液とを、マグネシウム原子とアルミニウム原子との比(Mg/Al)が2.6〜3.2となる割合で混合し、さらに苛性アルカリを加えて該液pH8.5〜11.5の反応液を得る工程、および
(2)反応液を50〜100℃で0.5〜20時間加熱熟成する工程、
(3)熟成後液からハイドロタルサイト粒子を固液分離、洗浄、脱水および乾燥することからなる形状が柱状の合成ハイドロタルサイト粒子の製造方法、
8.水酸化アルミニウム粒子が、日本薬局方第十五改正適合の乾燥水酸化アルミニウムゲルである前項7記載の製造方法、
9.炭酸マグネシウム粒子は形状が短冊状であり、長辺の長さが10〜100μm、短辺の長さが5〜20μm、長辺/短辺の比が2〜20であり、さらに日本薬局方第十五改正適合の塩基性炭酸マグネシウムである前項7記載の製造方法、
10.苛性アルカリが水酸化ナトリウムである前項7記載の製造方法、
である。
That is, the present invention
1. New synthetic hydrotalcite particles having a columnar shape under a microscope and satisfying the following Formula 2;

(Wherein x, y, and m are values satisfying 5.2 ≦ x ≦ 6.3, 1 ≦ y ≦ 1.5, and 3 ≦ m ≦ 8)
2. The synthetic hydrotalcite particle according to item 1, wherein the columnar particle has a height of 10 to 100 μm, a column diameter of 5 to 20 μm, and a height / diameter ratio (aspect ratio) of 2 to 20.
3. Synthetic hydrotalcite particles according to item 1, wherein the apparent specific volume is 2 to 3 mL / g,
4. The synthetic hydrotalcite particles according to item 1, wherein the specific surface area measured by the BET method is 30 to 200 m 2 / g,
5. Synthetic hydrotalcite particles according to paragraph 1 above, wherein the synthetic hydrotalcite particles conform to the standards listed in the Japanese Pharmacopoeia Pharmaceutical Standards 2002
6. An antacid containing the newly synthesized hydrotalcite particles described in the preceding item 1 as an active ingredient,
7. (1) An aqueous suspension of magnesium carbonate particles and an aqueous suspension of aluminum hydroxide at a ratio such that the ratio of magnesium atoms to aluminum atoms (Mg / Al) is 2.6-3.2. Mixing, further adding a caustic alkali to obtain a reaction solution having a pH of 8.5 to 11.5, and (2) aging the reaction solution at 50 to 100 ° C. for 0.5 to 20 hours,
(3) A method for producing synthetic hydrotalcite particles having a columnar shape comprising solid-liquid separation, washing, dehydration and drying of hydrotalcite particles from the liquid after aging,
8. The method according to item 7 above, wherein the aluminum hydroxide particles are dried aluminum hydroxide gel conforming to the 15th revision of the Japanese Pharmacopoeia.
9. Magnesium carbonate particles have a strip shape, the length of the long side is 10 to 100 μm, the length of the short side is 5 to 20 μm, the ratio of the long side / short side is 2 to 20, and The manufacturing method according to 7 above, which is basic magnesium carbonate conforming to the fifteenth revision,
10. The method according to item 7 above, wherein the caustic alkali is sodium hydroxide,
It is.

本発明により、形状が柱状で日本薬局方外医薬品規格2002に適合し、更にカサが低いため作業性が良く、打錠した時、錠剤の厚みが薄い剤形となる合成ハイドロタルサイト粒子が得られる。 According to the present invention, synthetic hydrotalcite particles that are columnar in shape and conform to the Japanese Pharmacopoeia Standard 2002, and have low workability, good workability, and a tablet form with a thin tablet thickness when tableted are obtained. It is done.

本発明の合成ハイドロタルサイト粒子は、上式化2で示され、形状が柱状であることを特徴とし、医薬用制酸剤として利用する合成ハイドロタルサイト粒子である。
本発明の方法によれば、上式化2におけるxの範囲が上記範囲外の既知のハイドロタルサイトであっても形状を柱状とすることが可能である。更に、Mgの一部を他のM2+イオンで置換したり、Alを他のM3+イオンと置換することが可能であり、COと他の陰イオンとのイオン交換も可能である。
したがって、本発明の方法によれば、医薬用制酸剤のみならず、多岐にわたる用途、例えば、吸着剤、樹脂用安定剤および担体等に使用可能な柱状ハイドロタルサイトを合成することができる。
The synthetic hydrotalcite particle of the present invention is a synthetic hydrotalcite particle represented by the above formula 2 and having a columnar shape and used as a pharmaceutical antacid.
According to the method of the present invention, even if the range of x in Formula 2 is a known hydrotalcite outside the above range, the shape can be made columnar. Further, a part of Mg can be replaced with other M 2+ ions, Al can be replaced with other M 3+ ions, and ion exchange between CO 3 and other anions is also possible.
Therefore, according to the method of the present invention, it is possible to synthesize columnar hydrotalcite that can be used not only for pharmaceutical antacids but also for various applications such as adsorbents, stabilizers for resins and carriers.

本発明の合成ハイドロタルサイト粒子は、2000倍の電子顕微鏡による拡大写真で観察して、全粒子の70%以上、好ましくは80%以上の個数の粒子が柱状であればよい。その柱状粒子の高さと直径は、平均高さが10〜100μm、平均直径が5〜20μmであり、高さ/直径の平均が2〜20である。高さについては、特に限定するものではないが10μm以下のものは合成できなく、また100μm以上のものも合成できない。直径についても、特に限定するものでないが5μm以下のものは合成できなく、20μm以上のものも合成できない。高さと直径の比は、高さと直径に支配されるので、おのずと上記範囲となる。 The synthetic hydrotalcite particles of the present invention should be 70% or more, preferably 80% or more of the total number of particles as long as they are observed in a magnified photograph with an electron microscope of 2000 times. As for the height and diameter of the columnar particles, the average height is 10 to 100 μm, the average diameter is 5 to 20 μm, and the average height / diameter is 2 to 20. The height is not particularly limited, but those having a thickness of 10 μm or less cannot be synthesized, and those having a height of 100 μm or more cannot be synthesized. The diameter is not particularly limited, but a diameter of 5 μm or less cannot be synthesized, and a diameter of 20 μm or more cannot be synthesized. Since the ratio of height to diameter is governed by height and diameter, it naturally falls within the above range.

見掛け比容については、2〜3mL/gであり低い側については特に限定しないが、2mL/g以下のものは得ることができない。3mL/g以上については、本発明の目的と異なるものである。 The apparent specific volume is 2 to 3 mL / g, and the lower side is not particularly limited. However, it cannot be obtained at 2 mL / g or less. About 3 mL / g or more, it is different from the object of the present invention.

BET法で測定された比表面積は30〜200m/gであるが、30m/g以下とするとハイドロタルサイト粒子の制酸剤としての特徴である酸反応性が悪くなると同時に、これもハイドロタルサイトの特徴である圧縮した時の錠剤の硬度が低いものとなる。また、200m/g以上のものは合成できない。 Although the measured specific surface area by the BET method is 30~200m 2 / g, 30m 2 / g or less to the the characteristic acid reactivity is as antacid hydrotalcite particles becomes poor at the same time, this also Hydro The hardness of the tablet when compressed is a characteristic of talcite. Moreover, the thing 200 m < 2 > / g or more cannot be synthesize | combined.

また本発明のハイドロタルサイト粒子は、表1に示すように日本薬局方外医薬品規格2002に適合するものである。更に、本発明のハイドロタルサイト粒子は、粉末X線回折法による測定に基づいて、ハイドロタルサイト粒子と同じパターンを示し、これ以外のパターンを示さない。 In addition, as shown in Table 1, the hydrotalcite particles of the present invention conform to the Japanese Pharmacopoeia Pharmaceutical Standard 2002. Furthermore, the hydrotalcite particles of the present invention show the same pattern as the hydrotalcite particles based on measurement by a powder X-ray diffraction method, and show no other patterns.



以下の合成例および比較例に基づき本発明をより詳細に説明するが、本発明はこれに限定されるものではない。また、ハイドロタルサイト粒子の特性は以下の方法により測定した。
(1)粒子形状:走査型電子顕微鏡(JSM−6300/日本電子)で倍率2000倍の写真を取り、その写真中の粒子の長辺、短辺、高さおよび直径を測定した。
(2)日本薬局方外医薬品規格2002合成ハイドロタルサイト規格:日本薬局法外医薬品合成ハイドロタルサイトに準じて測定した。
(3)CO:JIS R 9101のAGK法に準じて測定した。
(4)見かけ比容:JIS K 5101に準じて測定した。
(5)比表面積:ハイドロタルサイト粒子を真空圧100mmTorrで、105℃×3時間処理し、QUANTA CHROME社製NOVA2000を用いてBET法により測定した。
(6)打錠試験:(株)前川試験機製作所製 TYPE M 型静的圧縮機を用いて、錠剤径10mm、試料量200mg、打錠圧0.25tで打錠した。錠剤の厚みはMitutoyo製ノギス65を用いて測定し、錠剤の硬度はフロイント産業(株)製Table Tester 8Mを用いて測定した。
(7)X線回折:理学電気(株)製RINT2200Vを用いてCU−Kαにて測定した。
(8)合成例において使用した形状が短冊状の塩基性炭酸マグネシウムは、協和化学工業(株)製炭酸マグネシウム(商品名:シタ)を用いた。
なお、走査型電子顕微鏡で倍率2000倍の写真を取り、その写真で粒子の長辺および短辺を測定したところ表2のような結果が得られた。5個の塩基性炭酸マグネシウム粒子の平均は長辺38.6μm、短辺10.5μm、長辺/短辺=3.7であった。
(9)比較例において使用した塩基性炭酸マグネシウムは、株式会社トクヤマ製の塩基性炭酸マグネシウム(トクヤマ製)を用いた。なお、同塩基性炭酸マグネシウムの形状は不定形であった。
(10)合成例、比較例においては水酸化アルミニウムとして、協和化学工業(株)製乾燥水酸化アルミニウムゲル(商品名:S−100)をもちいた。
The present invention will be described in more detail based on the following synthesis examples and comparative examples, but the present invention is not limited thereto. The characteristics of the hydrotalcite particles were measured by the following method.
(1) Particle shape: A photograph with a magnification of 2000 times was taken with a scanning electron microscope (JSM-6300 / JEOL), and the long side, short side, height and diameter of the particles in the photo were measured.
(2) Japanese Pharmacopoeia Pharmaceutical Standard 2002 Synthetic Hydrotalcite Standard: Measured according to Japanese Pharmacopoeia Pharmaceutical Hydrotalcite.
(3) CO 3 : Measured according to the AGK method of JIS R 9101.
(4) Apparent specific volume: Measured according to JIS K 5101.
(5) Specific surface area: Hydrotalcite particles were treated at 105 ° C. for 3 hours at a vacuum pressure of 100 mmTorr, and measured by BET method using NOVA2000 manufactured by QUANTA CHROME.
(6) Tableting test: Tableting was performed using a TYPE M type static compressor manufactured by Maekawa Test Co., Ltd., with a tablet diameter of 10 mm, a sample amount of 200 mg, and a tableting pressure of 0.25 t. The thickness of the tablet was measured using a vernier caliper 65 manufactured by Mitutoyo, and the hardness of the tablet was measured using a Table Tester 8M manufactured by Freund Sangyo Co., Ltd.
(7) X-ray diffraction: Measured with CU-Kα using RINT2200V manufactured by Rigaku Corporation.
(8) Kyowa Chemical Industry Co., Ltd. magnesium carbonate (trade name: Shita) was used as the basic magnesium carbonate having a strip shape used in the synthesis examples.
In addition, when the photograph of magnification 2000 times was taken with the scanning electron microscope and the long side and the short side of the particle were measured with the photograph, the results shown in Table 2 were obtained. The average of the 5 basic magnesium carbonate particles was 38.6 μm long side, 10.5 μm short side, and long side / short side = 3.7.
(9) As the basic magnesium carbonate used in the comparative example, basic magnesium carbonate (manufactured by Tokuyama Corporation) manufactured by Tokuyama Corporation was used. The shape of the basic magnesium carbonate was indefinite.
(10) In the synthesis example and the comparative example, dry aluminum hydroxide gel (trade name: S-100) manufactured by Kyowa Chemical Industry Co., Ltd. was used as aluminum hydroxide.


(合成例1)
6L容ステンレス製反応容器に水道水3.8Lを投入し、攪拌下に、前記協和化学工業(株)製塩基性炭酸マグネシウムを424g(MgOとして4.5モル)投入し、炭酸マグネシウム懸濁液を作成する。続いて攪拌下に、前記乾燥水酸化アルミニウムゲル140g(Alとして0.74モル)および3.35mol/L水酸化ナトリウム水溶液1.79Lを投入した。得られた混合液の液温は25℃、液pHは10.65であった。続いて、液温を50℃に昇温し、50℃で24時間熟成した。冷後、ヌッチエを用いて減圧下に吸引ろ過し、洗浄、脱水しケーキを得た。得られたケーキに、固形分濃度として200g/Lとなるように水を加えて攪拌しスラリー化し、ラボスケールスプレードライヤーを用いて乾燥することにより、ハイドロタルサイト粒子を得た。得られたハイドロタルサイト粒子の、電子顕微鏡による倍率2000倍での観察下における粒子形状は、全粒子の70%以上が柱状であり、高さおよび直径および高さ/直径の比を測定したところ表3のような結果が得られた。5個のハイドロタルサイト粒子の平均値は高さ39.6μm、直径10.0μm、高さ/直径=3.9であった。
なお、得られたハイドロタルサイト粒子のその他の特性を表6に示す。
(Synthesis Example 1)
3.8 L of tap water was charged into a 6 L stainless steel reaction vessel, and 424 g (4.5 mol of MgO) of basic magnesium carbonate manufactured by Kyowa Chemical Industry Co., Ltd. was charged with stirring, and the magnesium carbonate suspension Create Subsequently, 140 g (0.74 mol as Al 2 O 3 ) of the dried aluminum hydroxide gel and 1.79 L of a 3.35 mol / L aqueous sodium hydroxide solution were added under stirring. The liquid temperature of the obtained liquid mixture was 25 degreeC, and liquid pH was 10.65. Subsequently, the liquid temperature was raised to 50 ° C. and aged at 50 ° C. for 24 hours. After cooling, suction filtration was performed under reduced pressure using Nuccie, washing and dehydration to obtain a cake. Hydrotalcite particles were obtained by adding water to the obtained cake so as to have a solid concentration of 200 g / L, stirring to make a slurry, and drying using a lab scale spray dryer. The particle shape of the obtained hydrotalcite particles under an observation with an electron microscope at a magnification of 2000 times is 70% or more of all particles being columnar, and the height and diameter and the height / diameter ratio were measured. Results as shown in Table 3 were obtained. The average value of the five hydrotalcite particles was 39.6 μm in height, 10.0 μm in diameter, and height / diameter = 3.9.
In addition, Table 6 shows other characteristics of the obtained hydrotalcite particles.

(合成例2)
合成例1において、熟成温度を70℃とし、熟成時間を7時間とした以外は合成例1と同操作を行いハイドロタルサイト粒子を得た。なお、塩基性炭酸マグネシウム、乾燥水酸化アルミニウムゲルおよび水酸化ナトリウム水溶液を混合した液のpHは10.57であった。得られたハイドロタルサイト粒子の、電子顕微鏡による倍率2000倍での観察下における粒子形状は、全粒子の70%以上が柱状であり、高さおよび直径および高さ/直径の比を測定したところ表4のような結果が得られた。5個のハイドロタルサイト粒子の平均値は高さ37.0μm、直径9.2μm、高さ/直径=4.2であった。
なお、得られたハイドロタルサイト粒子のその他の特性を表6に示す。
(Synthesis Example 2)
Hydrotalcite particles were obtained in the same manner as in Synthesis Example 1 except that the aging temperature was 70 ° C. and the aging time was 7 hours in Synthesis Example 1. In addition, pH of the liquid which mixed basic magnesium carbonate, dry aluminum hydroxide gel, and sodium hydroxide aqueous solution was 10.57. The particle shape of the obtained hydrotalcite particles under an observation with an electron microscope at a magnification of 2000 times is 70% or more of all particles being columnar, and the height and diameter and the height / diameter ratio were measured. The results shown in Table 4 were obtained. The average value of the five hydrotalcite particles was 37.0 μm in height, 9.2 μm in diameter, and height / diameter = 4.2.
In addition, Table 6 shows other characteristics of the obtained hydrotalcite particles.

(合成例3)
合成例1において、熟成温度を90℃とし、熟成時間を2時間とした以外は合成例1と同操作を行いハイドロタルサイト粒子を得た。なお、塩基性炭酸マグネシウム、乾燥水酸化アルミニウムゲルおよび水酸化ナトリウム水溶液を混合した液のpHは10.20であった。得られたハイドロタルサイト粒子の、電子顕微鏡による倍率2000倍での観察下における粒子形状は、全粒子の70%以上が柱状であり、高さおよび直径および高さ/直径の比を測定したところ表5のような結果が得られた。5個のハイドロタルサイト粒子の平均値は高さ44.2μm、直径10.1μm、高さ/直径=4.4であった。
なお、得られたハイドロタルサイト粒子のその他の特性を表6に、電子顕微鏡写真を図1に、およびX線回折パターンを図3に示す。
(Synthesis Example 3)
In Synthesis Example 1, hydrotalcite particles were obtained in the same manner as in Synthesis Example 1 except that the aging temperature was 90 ° C. and the aging time was 2 hours. In addition, pH of the liquid which mixed basic magnesium carbonate, dry aluminum hydroxide gel, and sodium hydroxide aqueous solution was 10.20. The particle shape of the obtained hydrotalcite particles under an observation with an electron microscope at a magnification of 2000 times is 70% or more of all particles being columnar, and the height and diameter and the height / diameter ratio were measured. Results as shown in Table 5 were obtained. The average value of the five hydrotalcite particles was 44.2 μm in height, 10.1 μm in diameter, and height / diameter = 4.4.
The other characteristics of the obtained hydrotalcite particles are shown in Table 6, an electron micrograph is shown in FIG. 1, and an X-ray diffraction pattern is shown in FIG.

(比較例1)
合成例3において、塩基性炭酸マグネシウムを前記株式会社トクヤマ製炭酸マグネシウムとした以外は合成例3と同操作を行いハイドロタルサイト粒子を得た。なお、塩基性炭酸マグネシウム、乾燥水酸化アルミニウムゲルおよび水酸化ナトリウム水溶液を混合した液のpHは10.35であった。得られたハイドロタルサイト粒子の、電子顕微鏡観察下における粒子形状は不定形であった。なお、得られたハイドロタルサイト粒子のその他の特性を表6に、電子顕微鏡写真を図2に示す。
(Comparative Example 1)
In Synthesis Example 3, hydrotalcite particles were obtained by performing the same operation as in Synthesis Example 3 except that basic magnesium carbonate was changed to magnesium carbonate manufactured by Tokuyama Corporation. In addition, pH of the liquid which mixed basic magnesium carbonate, dry aluminum hydroxide gel, and sodium hydroxide aqueous solution was 10.35. The particle shape of the obtained hydrotalcite particles under an electron microscope observation was indefinite. The other characteristics of the obtained hydrotalcite particles are shown in Table 6, and an electron micrograph is shown in FIG.

(参考例1)
参考例として、市販品ハイドロタルサイト粒子(商標名:アルカマックSH/協和化学工業(株)製)の特性を表6に示す。
(Reference Example 1)
As a reference example, Table 6 shows the characteristics of commercially available hydrotalcite particles (trade name: Alkamak SH / manufactured by Kyowa Chemical Industry Co., Ltd.).

本発明のハイドロタルサイト粒子は形状が柱状で、見かけ比容が低く、日本薬局方外医薬品規格2002に適合し、さらに、打錠された錠剤の厚みが薄いものであることが分かる。   It can be seen that the hydrotalcite particles of the present invention are columnar in shape, have a low apparent specific volume, conform to the Japanese Pharmacopoeia Pharmaceutical Standard 2002, and have a thin tablet.

図1は合成例3に係る柱状ハイドロタルサイト粒子の2000倍の走査型電信顕微鏡写真である。FIG. 1 is a scanning telegraph micrograph of 2000 times the columnar hydrotalcite particles according to Synthesis Example 3. 図2は比較例1に係る不定形ハイドロタルサイト粒子の1000倍の走査型電子顕微鏡写真である。FIG. 2 is a scanning electron micrograph of 1000 times the amorphous hydrotalcite particles according to Comparative Example 1. 図3は合成例3に係る柱状ハイドロタルサイト粒子のX線回折図である。FIG. 3 is an X-ray diffraction pattern of columnar hydrotalcite particles according to Synthesis Example 3.

Claims (10)

顕微鏡観察下における形状が柱状であり、且つ下記式化1を満足する新規合成ハイドロタルサイト粒子。

(式中x、yおよびmは5.2≦x≦6.3,1≦y≦1.5,3≦m≦8を満足する値とする。)
Novel synthetic hydrotalcite particles having a columnar shape under a microscope and satisfying the following formula 1.

(In the formula, x, y, and m are values satisfying 5.2 ≦ x ≦ 6.3, 1 ≦ y ≦ 1.5, and 3 ≦ m ≦ 8.)
上記柱状粒子の高さが10〜100μm、柱の直径が5〜20μm、高さ/直径の比(アスペクト比)が2〜20である請求項1記載の合成ハイドロタルサイト粒子。 The synthetic hydrotalcite particles according to claim 1, wherein the columnar particles have a height of 10 to 100 µm, a column diameter of 5 to 20 µm, and a height / diameter ratio (aspect ratio) of 2 to 20. 見掛け比容が2〜3mL/gである請求項1記載の合成ハイドロタルサイト粒子。 The synthetic hydrotalcite particles according to claim 1, having an apparent specific volume of 2 to 3 mL / g. BET法で測定された比表面積が、30〜200m/gである請求項1記載の合成ハイドロタルサイト粒子。 The synthetic hydrotalcite particles according to claim 1, wherein the specific surface area measured by the BET method is 30 to 200 m 2 / g. 日本薬局方外医薬品規格2002年収載規格に適合することを特徴とする請求項1記載の合成ハイドロタルサイト粒子。 The synthetic hydrotalcite particle according to claim 1, which conforms to the Japanese Pharmacopoeia Standard for Drugs Listed in 2002. 請求項1記載の新規合成ハイドロタルサイト粒子を有効成分とする制酸剤。 An antacid containing the newly synthesized hydrotalcite particle according to claim 1 as an active ingredient. (1)炭酸マグネシウム粒子の水懸濁液と水酸化アルミニウムの水懸濁液とを、マグネシウム原子とアルミニウム原子との比(Mg/Al)が2.6〜3.2となる割合で混合し、さらに苛性アルカリを加えて該液pH8.5〜11.5の反応液を得る工程、および
(2)反応液を50〜100℃で0.5〜20時間加熱熟成する工程、
(3)熟成後液からハイドロタルサイト粒子を固液分離、洗浄、脱水および乾燥することからなる形状が柱状の合成ハイドロタルサイト粒子の製造方法。
(1) An aqueous suspension of magnesium carbonate particles and an aqueous suspension of aluminum hydroxide are mixed at a ratio such that the ratio of magnesium atoms to aluminum atoms (Mg / Al) is 2.6 to 3.2. A step of further adding caustic alkali to obtain a reaction solution having a pH of 8.5 to 11.5, and (2) a step of heating and aging the reaction solution at 50 to 100 ° C. for 0.5 to 20 hours,
(3) A method for producing a synthetic hydrotalcite particle having a columnar shape comprising solid-liquid separation, washing, dehydration and drying of hydrotalcite particles from a solution after aging.
水酸化アルミニウム粒子が、日本薬局方第十五改正適合の乾燥水酸化アルミニウムゲルである請求項7記載の製造方法。 The production method according to claim 7, wherein the aluminum hydroxide particles are a dry aluminum hydroxide gel conforming to the 15th revision of the Japanese Pharmacopoeia. 炭酸マグネシウム粒子は形状が短冊状であり、長辺の長さが10〜100μm、短辺の長さが5〜20μm、長辺/短辺の比が2〜20であり、さらに日本薬局方第十五改正適合の塩基性炭酸マグネシウムである請求項7記載の製造方法。 Magnesium carbonate particles have a strip shape, the length of the long side is 10 to 100 μm, the length of the short side is 5 to 20 μm, the ratio of the long side / short side is 2 to 20, and the Japanese Pharmacopoeia The method according to claim 7, wherein the basic magnesium carbonate conforms to the 15th revision. 苛性アルカリが水酸化ナトリウムである請求項7記載の製造方法。 The process according to claim 7, wherein the caustic is sodium hydroxide.
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JP2017186271A (en) * 2016-04-05 2017-10-12 協和化学工業株式会社 Compact hydrotalcite tablet with rapid oral disintegration properties
CN111453750A (en) * 2020-05-29 2020-07-28 山东长泽新材料科技有限公司 Clean synthesis process of magnesium aluminum hydrotalcite
CN111714513A (en) * 2020-06-08 2020-09-29 安丘市鲁安药业有限责任公司 Preparation process of magnesium aluminocarbonate raw material medicine

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JP2005060164A (en) * 2003-08-12 2005-03-10 Nittetsu Mining Co Ltd Hydrotalcite particle, and production method therefor
JP2007106620A (en) * 2005-10-12 2007-04-26 Sakai Chem Ind Co Ltd Flowable hydrotalcite powder and its producing method

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JP2003306325A (en) * 2002-02-13 2003-10-28 Nittetsu Mining Co Ltd Basic magnesium carbonate, its production method, and composition or structure including the basic magnesium carbonate
JP2005060164A (en) * 2003-08-12 2005-03-10 Nittetsu Mining Co Ltd Hydrotalcite particle, and production method therefor
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017186271A (en) * 2016-04-05 2017-10-12 協和化学工業株式会社 Compact hydrotalcite tablet with rapid oral disintegration properties
CN111453750A (en) * 2020-05-29 2020-07-28 山东长泽新材料科技有限公司 Clean synthesis process of magnesium aluminum hydrotalcite
CN111453750B (en) * 2020-05-29 2021-09-03 山东长泽新材料科技有限公司 Clean synthesis process of magnesium aluminum hydrotalcite
CN111714513A (en) * 2020-06-08 2020-09-29 安丘市鲁安药业有限责任公司 Preparation process of magnesium aluminocarbonate raw material medicine

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