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Mechanism of Fine Particle Formation in a Three-phase Reactor

Research Project

Project/Area Number 01550726
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 化学工学
Research InstitutionUniversity of Tokyo

Principal Investigator

YOSHIDA Kunio  Univ. of Tokyo, Dept. of Chem. Engin., Professor, 工学部, 教授 (70010808)

Co-Investigator(Kenkyū-buntansha) TSUTSUMI Atsushi  Univ. of Tokyo Dept. of Chem. Engin., Lecturer, 工学部, 講師 (00188591)
Project Period (FY) 1989 – 1990
Project Status Completed (Fiscal Year 1990)
Budget Amount *help
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1990: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1989: ¥1,500,000 (Direct Cost: ¥1,500,000)
KeywordsFine 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
Research Abstract

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.

Report

(2 results)
  • 1990 Final Research Report Summary
  • 1989 Annual Research Report
  • Research Products

    (6 results)

All Other

All Publications (6 results)

  • [Publications] 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)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 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)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] A.Tsutsumi: "Role of the Bubble Wake in the Precipitation of Calcium Carbonate in Bubble Column Systems" Ind.Eng.Chem.Res.,. (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] K.Uebo: "Mechanism of Calcium Carbonate Fine Particles in a ThreeーPhase Reactor" Advanced Powder Tech.,. (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 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)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 北原博幸: "垂直管内気液固三相流の伝熱" 混相流. 3. 369-378 (1989)

    • Related Report
      1989 Annual Research Report

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Published: 1989-04-01   Modified: 2016-04-21  

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