| 单词 | fractionating |
| 释义 | > as lemmasˈfractionating ˈfractionating adj. and n. ; fractionating column, a long vertical chamber for fractionating liquids in which vapour from a still passes upwards to a condenser and mixes intimately with falling condensate on the way, so becoming enriched in the lower-boiling fractions. ΘΚΠ the world > matter > chemistry > equipment or apparatus > [noun] > distillation apparatus bodya1400 descensoryc1405 circulatory1559 receiver1576 bolt-glass1594 adopter1741 Woulfe's apparatus1800 alcogene1828 fractionating column1908 1908 Jrnl. Chem. Soc. 94 ii. 17 (heading) A Fractionating Column... A condenser is provided inside the top of the..apparatus, and the distilled liquid is collected at the lower part, being returned to the distillation flask or run off as desired. 1922 C. S. Robinson Elem. Fract. Distill. iii. 17 The second general method by which fractionating can be obtained, is fractional condensation. 1952 M. L. Smith & K. W. Stinson Fuels & Combustion i. 22 The vapors are passed into the fractionating column where the oil is separated into several fractions. 1970 R. M. E. Diamant Appl. Chem. Engineers (ed. 2) xiv. 248 The degree of separation of the liquid into upper and lower fractions depends upon the number of plates or the length of the fractionating column. < as lemmas |
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