Assertion: distillation | /r/HasProperty | removed by fractional distillation
Facets:
value: during ‘rectification’
type: TEMPORAL
Source sentences:
text: In other cases, undesirable ‘artifacts’ are formed during distillation, which are then removed during ‘rectification’ usually by fractional distillation, a process using a tall column that separates out single constituents or mixtures of compounds with similar boiling points.