fractional distillation
4.It is not always easy to separate a mixture of liquids into pure substances by fractional distillation.
5.A colorless crystalline hydrocarbon, C14H10, obtained by fractional distillation of coal-tar oils and used in dyes, drugs, and explosives.
6.A colorless, flammable liquid, C6H14, derived from the fractional distillation of petroleum and used as a solvent and as a working fluid in low-temperature thermometers.
7.1-Chloro-2-iodotetrafluoroethane was readily telomerized with tetrafluoroethylene giving low molecular weight telomers, Cl(CF_2CF_2)_nI(n=2～5), which were readily separated by fractional distillation.
8.A volatile, colorless, highly flammable liquid hydrocarbon, C7H16, obtained in the fractional distillation of petroleum and used as a standard in determining octane ratings, as an anesthetic, and as a solvent.
9.After the fractional distillation of nickel plating brightener DH-2 at reducing pressure and the designs of the cross experiences and the analysis of the plating experiences, we come to the result that the usage of CH_3CH(OH)CH_2OCH_2C ≡CCH_2OH andCH_3CH(OH)CH_2OCH_2≡CCH_2OCH_2CH(OH)CH_2is better than the original mixture.
