JP2008222533A - Acicular or columnar particle of calcium carbonate having high purity aragonite structure formed by carbon dioxide bubbling method, and method for manufacturing the same - Google Patents

Acicular or columnar particle of calcium carbonate having high purity aragonite structure formed by carbon dioxide bubbling method, and method for manufacturing the same Download PDF

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JP2008222533A
JP2008222533A JP2007067623A JP2007067623A JP2008222533A JP 2008222533 A JP2008222533 A JP 2008222533A JP 2007067623 A JP2007067623 A JP 2007067623A JP 2007067623 A JP2007067623 A JP 2007067623A JP 2008222533 A JP2008222533 A JP 2008222533A
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acicular
calcium carbonate
aragonite structure
same
manufacturing
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Masatada Fuji
正督 藤
Minoru Takahashi
実 高橋
Eisei Kan
永生 韓
Tatsuya Tomioka
達也 冨岡
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Nagoya Institute of Technology NUC
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Nagoya Institute of Technology NUC
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an acicular or columnar crystallized material having a high purity aragonite structure requiring no additive and to provide a method for manufacturing the crystal. <P>SOLUTION: After ammonium water is added to the aqueous solution of calcium chloride to adjust the pH corresponding to the aimed form, CO<SB>2</SB>gas is blown at a temperature of 60°C or higher to produce a crystallized material having an aragonite structure. The method for manufacturing the crystal is also provided. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、炭酸ガスバブリング法により形成した高純度のアラゴナイト組織を有する炭酸カルシウムの針状もしくは柱状粒子と其の製造方法に関するものである。   The present invention relates to needle-like or columnar particles of calcium carbonate having a high-purity aragonite structure formed by a carbon dioxide gas bubbling method and a method for producing the same.

従来の技術としては、針状の組織を有するアラゴナイトおよびその製法が出願されている。針状のものにあっては、例えば硝酸カルシウムと水酸化マグネシウムを含有するスラリーを60度C以上に保持して炭酸ガスを吹き込む方法が報告されている（特許文献１）。また塩化カルシウム、水酸化マグネシウムおよび水の３成分共存系に、60℃以上で炭酸ガスを吹き込んで反応させ、針状の炭酸カルシウムを析出させる（特許文献2）。が、いずれもカルサイト晶出を防ぐためインヒビターとしてMgが使用されておりかかる添加物を用いるという問題点があった。
特開平2003-63820 特開平05-221633 As a conventional technique, an aragonite having a needle-like structure and a manufacturing method thereof have been filed. In the case of needle-shaped ones, for example, a method in which a slurry containing calcium nitrate and magnesium hydroxide is maintained at 60 ° C. or higher and carbon dioxide gas is blown in has been reported (Patent Document 1). Further, carbon dioxide gas is blown into a three-component coexisting system of calcium chloride, magnesium hydroxide and water at 60 ° C. or higher to cause acicular calcium carbonate to precipitate (Patent Document 2). However, in order to prevent calcite crystallization, Mg is used as an inhibitor and there is a problem that such an additive is used.
JP 2003-63820 JP 05-221633

本発明は、上記従来の実情に鑑みてなされたものであって、添加物を必要としない高純度のアラゴナイト組織を有する針状ないしは柱状形状の晶出体と其の製造方法を提供することを解決すべき課題としている。 The present invention has been made in view of the above-described conventional circumstances, and provides a crystallized body having a high purity aragonite structure that does not require an additive and a needle-shaped or columnar-shaped crystallized body and a method for producing the same. This is a problem to be solved.

請求項１記載の発明は、塩化カルシウム水溶液にアンモニア水を加えて目的とする形状に対応したｐHに調整後、この溶液に60℃以上の温度でCO2ガスを吹き込むことによるMg、Fe等のイオンを含まない針状もしくは柱状形状を有するアラゴナイト組織を持った晶出体と其の製造方法である。
請求項2記載の発明は、炭酸カルシウムの占める割合が９８％より大きいアラゴナイト組織を有する針状ないし柱状形状を有するアラゴナイト組織を有する晶出体と其の製造方法である。 According to the first aspect of the present invention, the aqueous solution of calcium chloride is adjusted to pH corresponding to the target shape by adding aqueous ammonia, and then Mg, Fe, etc. are produced by blowing CO 2 gas into the solution at a temperature of 60 ° C. or higher. A crystallized body having an aragonite structure having an acicular or columnar shape that does not contain ions, and a method for producing the same.
The invention according to claim 2 is a crystallized body having an aragonite structure having an aragonite structure having an aragonite structure in which the proportion of calcium carbonate is greater than 98%, and a method for producing the same.

従来、針状アラゴナイトは、カルサイト晶出を防ぐためインヒビターとしてMg、Fe、K等が使用されている。本出願では、かかる添加物を必要としない高純度のアラゴナイト組織を有する針状ないしは柱状形状の晶出体とその製法を提供する。       Conventionally, acicular aragonite uses Mg, Fe, K, etc. as an inhibitor to prevent calcite crystallization. In the present application, there are provided needle-like or columnar crystallized bodies having a high-purity aragonite structure that does not require such an additive, and a method for producing the same.

以下，本発明を具体化した実施例を説明する。 Embodiments embodying the present invention will be described below.

塩化カルシウム濃度0.023mol/lの水溶液を60℃以上に保持し、これにCO2/N2を0.3乃至0.6とした混合ガスを１ｌあたり50ml乃至10 l/min約10min吹き込むことにより図１に示すようにアラゴナイト組織をもつ炭酸カルシウムの針状ないし柱状粒子が得られる。このときの溶液のｐHは８乃至10であった。粒子の形状、組織は温度に強く依存する。
本発明で得られたアラゴナイト組織をもつ炭酸カルシウムの針状と柱状粒子の写真図をそれぞれ図2と図3に示す。 As shown in FIG. 1, an aqueous solution having a calcium chloride concentration of 0.023 mol / l is maintained at 60 ° C. or more, and a mixed gas with CO 2 / N 2 of 0.3 to 0.6 is blown into the mixture at a rate of 50 ml to 10 l / min for about 10 minutes. Thus, acicular or columnar particles of calcium carbonate having an aragonite structure are obtained. The pH of the solution at this time was 8 to 10. The shape and structure of particles are strongly dependent on temperature.
Photographs of acicular and columnar particles of calcium carbonate having an aragonite structure obtained in the present invention are shown in FIGS. 2 and 3, respectively.

本発明によるアラゴナイトは従来方法のようにカルサイト析出を抑制するためのインヒビターを使用していないため高純度の炭酸カルシウムのアラゴナイト組織であり、安全性の面できわめて優れた利点を有する。例えば、食品添加用として利用可能性がある。 The aragonite according to the present invention is an aragonite structure of high-purity calcium carbonate because it does not use an inhibitor for suppressing calcite precipitation unlike the conventional method, and has an extremely excellent advantage in terms of safety. For example, it may be used as a food additive.

アラゴナイト組織をもつ炭酸カルシウムの針状ないし柱状粒子が得られることを示す説明図である。It is explanatory drawing which shows that the acicular or columnar particle | grains of calcium carbonate which have an aragonite structure are obtained. 本発明によるプロセスで得られた晶出体をろ過、乾燥して得られたアラゴナイト組織をもつ炭酸カルシウムの針状の写真図である。It is a needle-like photograph figure of the calcium carbonate which has the aragonite structure obtained by filtering and drying the crystallization body obtained by the process by the present invention. 本発明によるプロセスで得られた晶出体をろ過、乾燥して得られたアラゴナイト組織をもつ炭酸カルシウムの柱状粒子の写真図である。It is a photograph figure of the columnar particle | grains of the calcium carbonate which has the aragonite structure | tissue obtained by filtering and drying the crystallization body obtained by the process by this invention.

Claims (2)

塩化カルシウム水溶液にアンモニア水を加えて目的とする形状に対応したｐHに調整後、この溶液に60℃以上の温度でCO2ガスを吹き込むことによるMg、Fe等のイオンを含まない針状もしくは柱状形状を有するアラゴナイト組織を持った晶出体と其の製造方法。 After adjusting the pH to the desired shape by adding ammonia water to the calcium chloride aqueous solution, needle-like or columnar shapes containing no ions of Mg, Fe, etc. by blowing CO 2 gas into the solution at a temperature of 60 ° C. or higher A crystallized body having an aragonite structure having a shape and a method for producing the same. 炭酸カルシウムの占める割合が９８％より大きいアラゴナイト組織を有する針状ないし柱状形状を有するアラゴナイト組織を有する晶出体と其の製造方法。 A crystallized body having an aragonite structure having an acicular or columnar shape having an aragonite structure in which the proportion of calcium carbonate is greater than 98%, and a method for producing the same.
JP2007067623A 2007-03-15 2007-03-15 Acicular or columnar particle of calcium carbonate having high purity aragonite structure formed by carbon dioxide bubbling method, and method for manufacturing the same Pending JP2008222533A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013047173A (en) * 2011-07-28 2013-03-07 Kitasato Institute Method for producing alkaline earth metal carbonate using carbon dioxide in air and use of the same
US20150037231A1 (en) * 2009-03-02 2015-02-05 Calera Corporation Gas stream multi-pollutants control systems and methods
CN115072757A (en) * 2022-06-27 2022-09-20 山西石器时代新材料科技有限公司 Fine rod-shaped aragonite calcium carbonate and preparation method thereof
CN115092948A (en) * 2022-06-27 2022-09-23 山西石器时代新材料科技有限公司 Method for preparing fine rod-like aragonite calcium carbonate by using flue gas and preparation method thereof
CN116282997A (en) * 2023-02-27 2023-06-23 武汉理工大学 Calcium carbonate cement, calcium carbonate cement hardened body and application thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05221633A (en) * 1991-02-04 1993-08-31 Yahashi Kogyo Kk Method forming acicular calcium carbonate particle
JP2003063820A (en) * 2001-08-27 2003-03-05 Oji Paper Co Ltd Method for producing acicular light precipitated calcium carbonate and paper containing the calcium carbonate
JP2005281034A (en) * 2004-03-29 2005-10-13 Nagoya Kogyo Univ Hollow/spherical calcium carbonate particles and method for manufacturing the same
JP2008115053A (en) * 2006-11-07 2008-05-22 Nagoya Institute Of Technology Hollow calcium carbonate particles which is synthesized in non-equilibrium situation and method for synthesis of the same
JP2008222534A (en) * 2007-03-15 2008-09-25 Nagoya Institute Of Technology Leaf-like and folded aragonite particle synthesized from carbonate and method for manufacturing the same

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05221633A (en) * 1991-02-04 1993-08-31 Yahashi Kogyo Kk Method forming acicular calcium carbonate particle
JP2003063820A (en) * 2001-08-27 2003-03-05 Oji Paper Co Ltd Method for producing acicular light precipitated calcium carbonate and paper containing the calcium carbonate
JP2005281034A (en) * 2004-03-29 2005-10-13 Nagoya Kogyo Univ Hollow/spherical calcium carbonate particles and method for manufacturing the same
JP2008115053A (en) * 2006-11-07 2008-05-22 Nagoya Institute Of Technology Hollow calcium carbonate particles which is synthesized in non-equilibrium situation and method for synthesis of the same
JP2008222534A (en) * 2007-03-15 2008-09-25 Nagoya Institute Of Technology Leaf-like and folded aragonite particle synthesized from carbonate and method for manufacturing the same

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150037231A1 (en) * 2009-03-02 2015-02-05 Calera Corporation Gas stream multi-pollutants control systems and methods
JP2013047173A (en) * 2011-07-28 2013-03-07 Kitasato Institute Method for producing alkaline earth metal carbonate using carbon dioxide in air and use of the same
CN115072757A (en) * 2022-06-27 2022-09-20 山西石器时代新材料科技有限公司 Fine rod-shaped aragonite calcium carbonate and preparation method thereof
CN115092948A (en) * 2022-06-27 2022-09-23 山西石器时代新材料科技有限公司 Method for preparing fine rod-like aragonite calcium carbonate by using flue gas and preparation method thereof
CN115072757B (en) * 2022-06-27 2024-03-15 山西石器时代新材料科技有限公司 Fine rod-shaped aragonite type calcium carbonate and preparation method thereof
CN115092948B (en) * 2022-06-27 2024-03-15 山西石器时代新材料科技有限公司 Fine rod-shaped aragonite calcium carbonate prepared by utilizing flue gas and preparation method thereof
CN116282997A (en) * 2023-02-27 2023-06-23 武汉理工大学 Calcium carbonate cement, calcium carbonate cement hardened body and application thereof

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