JP2008115053A5 - - Google Patents
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- JP2008115053A5 JP2008115053A5 JP2006301117A JP2006301117A JP2008115053A5 JP 2008115053 A5 JP2008115053 A5 JP 2008115053A5 JP 2006301117 A JP2006301117 A JP 2006301117A JP 2006301117 A JP2006301117 A JP 2006301117A JP 2008115053 A5 JP2008115053 A5 JP 2008115053A5
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- calcium carbonate
- hollow structure
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- spherical shape
- flow rate
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Description
請求項１記載の発明の中空構造を有する炭酸カルシウム及びその合成方法は、塩化カルシウムなどのカルシウム塩水溶液に、炭酸ガスを比較的高流量で直接的に導入することにより形成せしめられる炭酸イオン系非平衡条件下において合成するものである。
請求項２記載の発明の中空構造を有する炭酸カルシウム及びその合成方法は、請求項１記載の発明の中空構造を有する炭酸カルシウム及びその合成方法において、溶液、pH、温度及び炭酸ガス流量等から選ばれた少なくとも１種以上の操作条件を適宜設定及び制御することにより、中空構造を有する炭酸カルシウム粒子のサイズ及び／又は形態等を制御可能であることを特徴とする。
炭酸ガス流量および通気時間、原料濃度、反応温度、pH等といった操作条件を変化させることで、非平衡状態を制御することにより、合成される炭酸カルシウム粒子の形態・形状を制御すること、とりわけ、比較的高流量での炭酸ガス通気且つ高い初期pH条件において、高い割合で中空状の炭酸カルシウム粒子が合成可能であり、
請求項3記載の発明、すなわち、粒径が1〜10μm程度で、ナノサイズのバテライト微結晶で構成される殻を有する、リング状、略球状及び球状である中空構造を有する炭酸カルシウムを得ることが出来る。
According to the first aspect of the present invention, there is provided a calcium carbonate having a hollow structure and a method for synthesizing the same, which are formed by directly introducing carbon dioxide into a calcium salt aqueous solution such as calcium chloride at a relatively high flow rate. It is synthesized under equilibrium conditions.
The calcium carbonate having a hollow structure of the invention described in claim 2 and the synthesis method thereof are selected from the solution, pH, temperature, carbon dioxide gas flow rate, etc. in the calcium carbonate having the hollow structure of the invention of claim 1 and the synthesis method thereof. The size and / or form of the calcium carbonate particles having a hollow structure can be controlled by appropriately setting and controlling at least one kind of operation condition.
By controlling the non-equilibrium state by changing the operating conditions such as carbon dioxide flow rate and aeration time, raw material concentration, reaction temperature, pH, etc., the shape and shape of the synthesized calcium carbonate particles are controlled. Under a relatively high flow rate of carbon dioxide gas and high initial pH conditions, a high proportion of hollow calcium carbonate particles can be synthesized,
The invention according to claim 3, that is, the calcium carbonate having a hollow structure having a ring shape, a substantially spherical shape, and a spherical shape, having a shell composed of nanosized vaterite microcrystals having a particle size of about 1 to 10 μm. Can be obtained.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006301117A JP5352808B2 (en) | 2006-11-07 | 2006-11-07 | Hollow calcium carbonate particles synthesized in a non-equilibrium state and method for synthesizing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006301117A JP5352808B2 (en) | 2006-11-07 | 2006-11-07 | Hollow calcium carbonate particles synthesized in a non-equilibrium state and method for synthesizing the same |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2008115053A JP2008115053A (en) | 2008-05-22 |
| JP2008115053A5 true JP2008115053A5 (en) | 2008-11-13 |
| JP5352808B2 JP5352808B2 (en) | 2013-11-27 |
Family
ID=39501309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2006301117A Active JP5352808B2 (en) | 2006-11-07 | 2006-11-07 | Hollow calcium carbonate particles synthesized in a non-equilibrium state and method for synthesizing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP5352808B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008222533A (en) * | 2007-03-15 | 2008-09-25 | Nagoya Institute Of Technology | Acicular or columnar particle of calcium carbonate having high purity aragonite structure formed by carbon dioxide bubbling method, and method for manufacturing the same |
| JP5967520B2 (en) * | 2012-04-11 | 2016-08-10 | 国立大学法人 名古屋工業大学 | Calcium carbonate hollow particles and method for producing the same |
| TWI736397B (en) * | 2020-08-20 | 2021-08-11 | 財團法人工業技術研究院 | Hollow calcium carbonate microspheres and method for preparing the same |
| CN115196661B (en) * | 2022-07-13 | 2023-06-30 | 西安交通大学 | Metal oxide or peroxide doped hollow calcium carbonate nanosphere and preparation method and application thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63103824A (en) * | 1986-10-18 | 1988-05-09 | Kiyoshi Sugawara | Production of vaterite based calcium carbonate |
| JPH02153819A (en) * | 1988-09-12 | 1990-06-13 | Sanyo Kokusaku Pulp Co Ltd | Production of hollow and spherical vaterite type calcium carbide and stabilization thereof |
| JPH06102542B2 (en) * | 1990-06-11 | 1994-12-14 | 矢橋工業株式会社 | Method for producing spherical particle calcium carbonate |
| JP3340756B2 (en) * | 1991-12-03 | 2002-11-05 | 丸尾カルシウム株式会社 | Method for producing monodisperse vaterite-type calcium carbonate with controlled morphology |
| JP4660745B2 (en) * | 2004-03-29 | 2011-03-30 | 国立大学法人 名古屋工業大学 | Hollow / spherical calcium carbonate particles and method for producing the same |
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2006
- 2006-11-07 JP JP2006301117A patent/JP5352808B2/en active Active
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