分別晶析法




化学における分別晶析（ぶんべつしょうせき、英: fractional crystallization）法は、溶解度の差に基づいて物質を精製する手法である。結晶化における差によって分別（英語版）を行う。溶液中の2つ以上の物質の混合物が（例えば溶液の温度を下げるなどして）結晶化できるとすると、沈殿物は溶けにくい物質をより多く含む。沈殿中の成分の比率はそれらの溶解度積に依存する。もし溶解度積が非常に似ているとすると、完全な分離を達成するためにはカスケード過程が必要となる。この手法は化学工学においてしばしば用いられる。



関連項目



  • 結晶

  • 結晶構造

  • 晶子（英語版）

  • 結晶化

  • 分別凍結（英語版）

  • レーザー溶融ペデスタル法（英語版）

  • 再結晶 (化学)（英語版）

  • 種結晶（英語版）

  • 単結晶

  • 分別結晶作用（英語版）



外部リンク



  • "Small Molecule Crystalization" (PDF) at Illinois Institute of Technology website







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