Continuous Production of Quinacridone Nanocrystals and Control of Crystal Form by High-Temperature Water Crystallization Method

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概要

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• A high-temperature water (HTW) crystallization method was applied to produce size- and form-controlled organic nanocrystals without the use of any organic solvents. HTW and room-temperature water (RTW) were used as the extraction and cooling solvents, respectively. Nanocrystals are precipitated by mixing a high-temperature quinacridone aqueous solution in a newly developed micromixing unit with RTW from another line. Quinacridone nanocrystals having an average diameter of ca. 9 nm as determined from transmission electron microscopy observations and ca. 83 nm from dynamic light scattering measurements were produced at 250.6°C and 24 MPa with a flow rate of 10 g/min for HTW and 20 g/min for RTW. In addition, it was found that nanocrystals having different crystal sizes and forms could be obtained by changing the temperature and flow rate of RTW. This new method promises an environmentally sustainable process for the continuous production of organic nanocrystals.

• Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
• 2006-01-15

著者

• Nakanishi Hachiro

  Institute For Chemical Reaction Science Tohoku University

• Arai Kunio

  Graduate School Of Environmental Studies Tohoku University

• Kasai Hitoshi

  Institute For Multidisciplinary Research For Advanced Materials Tohoku University

• Nakanishi Hachiro

  Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Sendai 980-8577, Japan

• Hiaki Toshihiko

  Department of Applied Molecular Chemistry, College of Industrial Technology, Nihon University, 1-2-1 Izumi-cho, Narashino, Chiba 275-8575, Japan

• Sue Kiwamu

  Department of Applied Molecular Chemistry, College of Industrial Technology, Nihon University, 1-2-1 Izumi-cho, Narashino, Chiba 275-8575, Japan

• Usami Toshihiko

  Graduate School of Environmental Studies, Tohoku University, Aoba 6-6-07, Aramaki, Aoba-ku, Sendai 980-8579, Japan

• Arai Kunio

  Graduate School of Environmental Studies, Tohoku University, Aoba 6-6-07, Aramaki, Aoba-ku, Sendai 980-8579, Japan

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