| 单词 | steam distillation |
| 释义 | > as lemmassteam distillation steam distillation n. Physical Chemistry distillation of a liquid in a current of steam, used esp. to purify at temperatures below their normal boiling points liquids that are not very volatile and are immiscible with water. ΘΚΠ the world > matter > chemistry > chemical reactions or processes > [noun] > chemical reactions or processes (named) > distillation > steam distillation steam distillation1904 1904 Analyst XXIX. 385 (heading) Laboratory apparatus for steam distillation. 1954 Thorpe's Dict. Appl. Chem. (ed. 4) XI. 85/2 The chief advantage offered by steam distillation is that a substance of fairly low volatility can be separated from non-volatile impurities at a temperature much below its normal boiling-point. 1972 P. R. S. Murray Princ. Org. Chem. ix. 58 Steam distillation is most effective when one of the components to be separated..has a high molecular weight. < as lemmas |
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