Mechanism of Fine Particle Formation in a Three-phase Reactor

三相反应器中细颗粒的形成机理

• 批准号: 01550726
• 负责人: YOSHIDA Kunio
• 金额: $ 1.28万
• 依托单位: University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1989
• 资助国家: 日本
• 起止时间: 1989 至 1990
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-01550726/
• 关键词: Fine particles; Calcium carbonate; Three-phase reactor; Role of bubble wake; 微粒子生成; 三相反応; 構造制御; 炭酸カルシウム粒子

In the last decade, fine powder technology has advanced the process development of functional materials production. Fine calcium carbonate (CaCO_3) particles are one of the most versatile functional filler which are utilized for a wide range of products such as paper coatings, paints, polymersetc.Calcium carbonate particles are produced from precipitate in an aqueous suspension of calcium hydroxide by injecting carbon dioxide gas. Three types of calcite particles, i. e., rhombohedral, rounded and slender particles, were finally obtained by changing operation conditions.The relationship between the particle shape or size and the operation condition was investigated, and the mechanism for formation of three types of particles was discussed, especially the role of bubbles which are rising in a solid-liquid suspension was experimentally explored.

近十年来，细粉技术推动了功能材料生产工艺的发展。细碳酸钙 (CaCO_3) 颗粒是最通用的功能性填料之一，可用于多种产品，如纸张涂料、油漆、聚合物等。碳酸钙颗粒是通过注入碳从氢氧化钙水悬浮液中的沉淀物中产生的二氧化碳气体。三种类型的方解石颗粒，i。通过改变操作条件，最终得到菱形、圆形和细长的颗粒。研究了颗粒形状或尺寸与操作条件之间的关系，讨论了三种颗粒的形成机理，特别是颗粒的作用通过实验探索了在固液悬浮液中上升的气泡。

项目成果

Kazuya Uebo, Ryohei Yamazaki and Kunio Yoshida: "Mechanism of Calcium Carbonate Powder Formation in a three-phase Reactor" Proceedings of 2nd World Congress of Particle Technol.Vol. 4. 278-85 (1990)

Kazuya Uebo、Ryohei Yamazaki 和 Kunio Yoshida：“三相反应器中碳酸钙粉末形成的机理”第二届世界粒子技术大会论文集。

K.Uebo: "Mechanism of Calcium Carbonate Powder Formation in a ThreeーPhase Reactor" Proc.of 2nd World Congress of Pacticle Technol.4. 278-285 (1990)

K.Uebo：“三相反应器中碳酸钙粉末形成的机理”Proc.of 第二届世界粒子技术大会 278-285 (1990)。

A.Tsutsumi: "Role of the Bubble Wake in Fine Particle Production in Bubble Column Systems" Proc.of 2nd World Congress of Particle Technol.4. 294-302 (1990)

A.Tsutsumi：“气泡尾流在气泡塔系统细颗粒生产中的作用”Proc.of 第二届世界粒子技术大会。4。

北原博幸: "垂直管内気液固三相流の伝熱" 混相流. 3. 369-378 (1989)

Hiroyuki Kitahara：“垂直管道中气-液-固三相流的传热”多相流。3. 369-378 (1989)

A.Tsutsumi: "Role of the Bubble Wake in the Precipitation of Calcium Carbonate in Bubble Column Systems" Ind.Eng.Chem.Res.,. (1991)

A.Tsutsumi：“气泡尾流在气泡塔系统中碳酸钙沉淀中的作用”Ind.Eng.Chem.Res.,。