化工专业英语 Unit9辅导 孙津清
化工专业英语 Unit 9 辅导 孙津清
、课文的主要内容 课文重点介绍了石油分馏的原理和步骤，并对 石油蒸馏设备作了简要介绍
一、课文的主要内容 • 课文重点介绍了石油分馏的原理和步骤，并对 石油蒸馏设备作了简要介绍
二、重点单词 ignite vt..&vi.点燃；点火 refine vt..精炼；精制 。 fuel n.燃料，燃烧剂 chemical adj.化学的；用化学方法制造的； n.化学药品 ● atmosphere n.大气；大气压（缩写为atm) 。unique adj.独一无二的，惟一的
二、重点单词 • ignite vt. & vi. 点燃；点火 • refine vt. 精炼；精制 • fuel n. 燃料, 燃烧剂 • chemical adj. 化学的；用化学方法制造的； n. 化学药品 • atmosphere n. 大气；大气压（缩写为atm） • unique adj. 独一无二的, 惟一的
二、 重点单词 vapor n.水汽，水蒸气， ● tray n.盘子；塔板 loosen vt.&vi.解开；放松 condense vt.&i.(使)变稠或变浓；浓缩；( 使)凝结 condenser n.冷凝器 。barrel n.桶，琵琶桶；桶（容量单位）
二、重点单词 • vapor n. 水汽,水蒸气, • tray n. 盘子；塔板 • loosen vt. & vi. 解开；放松 • condense vt. & vi. (使)变稠或变浓；浓缩；( 使)凝结 • condenser n. 冷凝器 • barrel n. 桶, 琵琶桶；桶（容量单位）
三、 重要词组 separation technology 分离技术 bubble cap 泡罩 storage tank 储油罐 vapor phase 气相 distillation column 蒸馏塔 temperature difference 温度差 substances with higher boiling points高沸点的 物质 。high pressure steam 高压蒸汽
三、重要词组 • separation technology 分离技术 • bubble cap 泡罩 • storage tank 储油罐 • vapor phase 气相 • distillation column 蒸馏塔 • temperature difference 温度差 • substances with higher boiling points 高沸点的 物质 • high pressure steam 高压蒸汽
三、重要词组 crude oil 原油 vapor phase气相
三、重要词组 • crude oil 原油 • vapor phase 气相
四、课文讲解 Petroleum is a mixture of hydrocarbon molecules.The molecules have different sizes and numbers of carbon atoms. The small molecules have few carbon atoms and low boiling points,while the large molecules have many carbon atoms and high boiling points. l)while the large molecules have many:表对 比的状语从句
四、课文讲解 • Petroleum is a mixture of hydrocarbon molecules. The molecules have different sizes and numbers of carbon atoms. • The small molecules have few carbon atoms and low boiling points, while the large molecules have many carbon atoms and high boiling points. 1） while the large molecules have many ：表对 比的状语从句
四、课文讲解 2)boiling point:沸点
四、课文讲解 2）boiling point：沸点
四、课文讲解 In this form,petroleum is difficult to ignite and therefore is of little use.It must be refined to make useful fuels and chemicals. 1)of little use:用处不大
四、课文讲解 • In this form, petroleum is difficult to ignite and therefore is of little use. It must be refined to make useful fuels and chemicals. 1） of little use：用处不大
四、课文讲解 The first step in refining is the separation of petroleum into fractions by fractional distillation in an oil refinery.Each fraction consists of a mixture of hydrocarbon molecules. Because they have different boiling temperatures,they can be separated easily by the process. 1) fractional distillation:分馏 2)oil refinery:炼油厂
四、课文讲解 • The first step in refining is the separation of petroleum into fractions by fractional distillation in an oil refinery. Each fraction consists of a mixture of hydrocarbon molecules. Because they have different boiling temperatures, they can be separated easily by the process. 1） fractional distillation ：分馏 2） oil refinery：炼油厂