Unit 18 Distilling Equipment
Unit 18 Distilling Equipment
Words and Expressions Distillation n.蒸馏 distil v. Distillation --a unit operation whereby components of a liquid mixture are separated by boiling because of their difference in vapor pressure. Evaporation---removing volatile solvent from nonvolatile solute in solution. Drying---volatile liquid (usually water)are removed from solid materials
Words and Expressions Distillation n. 蒸馏 distil v. Distillation --- a unit operation whereby components of a liquid mixture are separated by boiling because of their difference in vapor pressure. Evaporation--- removing volatile solvent from nonvolatile solute in solution. Drying--- volatile liquid (usually water) are removed from solid materials
Evaporation differs from distillation in that the vapor usually is a single component,and even when the vapor is mixture,no attempt is made in the evaporation step to separate the vapor into fractions. 区别： 收集挥发组分的方法；分离难度；多组分间相互分离时的 难易程度
Evaporation differs from distillation in that the vapor usually is a single component, and even when the vapor is mixture, no attempt is made in the evaporation step to separate the vapor into fractions. 区别： 收集挥发组分的方法；分离难度；多组分间相互分离时的 难易程度
Volatility n.挥发性 Volatile adj.挥发性的，易挥发的 --(technical)(of a substance)that changes quickly into a gas petrol is a volatile substance. -(of a person or their moods)changing easily from one mood to another @a highly~personality反复无常的个性 -(of a situation)likely to change suddenly easily becoming dangerous不稳定的，易恶化的 @a highly situation from which riots (might develop
Volatility n. 挥发性 Volatile adj. 挥发性的,易挥发的 --(technical) (of a substance) that changes quickly into a gas @ petrol is a volatile substance. -- (of a person or their moods) changing easily from one mood to another @ a highly ~ personality 反复无常的个性 -- (of a situation) likely to change suddenly ; easily becoming dangerous 不稳定的,易恶化的 @a highly ~ situation from which riots（骚乱） might develop
Residue n.剩余，残留物 Residual a.残余的eg.residual pressure) ---(technical)a small amount of sth that remains at the end of a process
Residue n.剩余，残留物 (Residual a.残余的 eg. residual pressure) ---(technical) a small amount of sth that remains at the end of a process