Fractional distillation

Japanese: 分留 - ぶんりゅう

Abbreviation for fractional distillation. A method of separating liquid mixtures with small differences in boiling point by repeating distillation many times. During distillation, the gas phase is richer in low-boiling components than the liquid phase, so if the vapor produced is constantly removed, the high-boiling components gradually become concentrated in the liquid phase. In general, fractions of each temperature range are separated, and each fraction is further distilled to separate each component. When this is done on a large scale in the oil refining industry, a rectification column is used. → Rectification → Related topics Fractional crystallization

Source : Heibonsha Encyclopedia About MyPedia Information

Japanese:

分別蒸留の略。蒸留を何回も繰り返して沸点差の小さい液体混合物を分離する方法。蒸留に際し，気相のほうが液相より低沸点成分に富むので，生成した蒸気を絶えず除去すると次第に液相に高沸点成分が濃縮される。一般には各温度範囲の留分を分け取り，さらに各留分を蒸留して各成分を分離する。石油精製工業などで大規模に行う場合には精留塔が利用される。→精留
→関連項目分別結晶

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