noun
rectifying tower; rectifying column
Technical term in chemical engineering for a distillation column used to separate liquid mixtures by boiling point differences.
精留塔は石油化学プラントでよく使われる。
Rectifying towers are often used in petrochemical plants.
Compound of 精留 (せいりゅう, 'rectification') and 塔 (とう, 'tower'). The exact historical derivation is uncertain; the spelling is conventionally associated with the meaning.