[化工] 分馏
It can be separated from each other by ordinary fractional distillation.
两者通过普通的分馏彼此分离。
Mathematical analysis on the refrigeratory system and fractional distillation system of the plant provides a basis for plant design.
文中对产冷、精馏系统进行了数学分析，为机组设计提供了理论依据。
The feasibility of recovery of naphthalene from the residue of fractional crystallization process by extractive distillation is discussed.
探讨了用萃取精馏法从分步结晶萘残油中回收萘的可行性。
An apparatus for the fractional distillation of ethanol from fermentation on an industrial scale.
规模生产从氨基酸发酵中分馏蒸馏乙醇的装置。
The main method of separation used in refineries is fractional distillation although further processing is normally required to produce marketable petroleum products.
分离石油主要采用的方法就是分馏，然后通过深加工才能得到可以销售的石油产品。
The main genesis of heterogeneous crude is migration and fractional distillation of low mature crude, mixing of crude, thickening by edge water, and thickening by bottom water.
影响原油非均质性的主要成因类型有低熟原油的运移分馏作用、原油混合作用、边水改造稠变作用和底水改造稠变作用等。
A colorless crystalline hydrocarbon, C14H10, obtained by fractional distillation of coal-tar oils and used in dyes, drugs, and explosives.
菲一种无色的晶体碳氢化合物，c14h10，通过蒸馏*********而少量地获得，用于。
In your fractional distillation condenser.
或在分馏冷凝器。
A colorless, flammable liquid, C6H14, derived from the fractional distillation of petroleum and used as a solvent and as a.
已烷一种无色可燃液体，c6h14，从石油的分馏中提取，用作溶剂和低。
K. Neon, argon, and krypton are obtained from fractional distillation of liquid air.
氖、氩、氪都能够通过分馏液态空气获得。
In fractional distillation, that part of the distillate which may be returned to the column to assist in ****** a better separation into desired fractions.
在分馏中被送回塔内促进更好分离成所需馏分的那部分馏分油。
A mole analysis of the separator liquid and gas samples is obtained usually by means of a fractional distillation column.
通常我们可以通过分裂蒸馏塔，对分离液、气进行摩尔比分析。
The method avoids product fractionation in the prior coking fractional distillation column, thereby greatly reducing investment and operation cost.
该方法不需要原先的焦化分馏塔进行产品分馏，大大降低了投资和操作费用。
A mole analysis of the separator liquid and gas samples is obtained usually by means a fractional distillation column.
通常我们可以通过分裂蒸馏塔，对分离液、气进行摩尔比分析。
The second variation type is called reversion evolution type, which represents the liquid segregation mainly with vapour-liquid fractional distillation.
②称为反向演化类型，代表气液分馏为主的液态分离；
Let's say you're doing a fractional distillation of some sort.
可以说我们是在,做某种分馏。
It occurs in minute amounts in the atmosphere and is obtained by fractional distillation of liquefied air.
大气中含量极少，从液态空气的蒸馏中可以得到。
Arsenic removal tests by means of oxidation and HCl extraction as well as fractional distillation were carried out.
开展了氧化除砷及盐酸萃取除砷和精馏净化的试验；
The Pb, S isotopic study shows that the mass migration and the fractional distillation of Pb isotope took place in the whole rock and in the cement.
铅、硫同位素研究认为从全岩到胶结物，铅同位素发生了质量迁移和分馏作用；
Learning 4 sets of production unit: MTBE, fractional distillation, cracking and cracking by catalytic agent.
实习期间学习的四套装置为MTBE，气体分馏，重整和催化裂化装置。
The main method of separation used in refineries is fractional distillation , although further processing is normally required to produce marketable petroleum products .
炼油厂所使用的主要分离方法是分馏，不过分馏所得一般都需要一步加工才能成为可供销售的石油制品。
|dephlegmation/fractionating;[化工]分馏
分馏（Fractional Distillation）是一种基于液体混合物中各组分沸点差异进行分离的物理提纯技术。其核心原理是通过连续加热与冷凝循环，实现对沸点相近成分的高效分离。该技术广泛应用于石油化工、化学制药及实验室研究等领域。
分馏过程主要依赖分馏柱结构设计，柱内填充物可增大气液接触面积，促使高沸点组分在上升过程中多次冷凝回流，低沸点组分则优先汽化进入冷凝器。以原油加工为例，分馏塔可依次分离出石油气（<40℃）、汽油（40-200℃）、煤油（175-275℃）、柴油（250-350℃）和重油（>350℃）等产物。实验室中常用该技术提纯乙醇溶液，最高可获得95.6%的乙醇纯度。
该技术的数学表达式为： $$ Delta T = frac{P_A^circ - PB^circ}{P{total}} $$ 其中$Delta T$表示分离效率，$P_A^circ$和$PB^circ$分别为纯组分A、B的蒸气压，$P{total}$为系统总压。
参考文献： International Union of Pure and Applied Chemistry. (2024). Distillation Terminology. American Chemical Society. (2023). Petroleum Refining Processes. Royal Society of Chemistry. (2024). Laboratory Separation Techniques. Atkins, P. & de Paula, J. (2025). Physical Chemistry: Thermodynamics of Distillation.
Fractional Distillation（分馏） 是一种用于分离液体混合物的技术，尤其适用于沸点相近的组分。以下是详细解释：
分馏通过分馏柱实现多次汽化与冷凝的循环。混合物加热后，挥发性较高的组分优先汽化，进入分馏柱。柱内温度梯度使得蒸气在上升过程中反复冷凝和再汽化，最终高沸点物质在柱底富集，低沸点物质在顶部冷凝收集。其核心原理是各组分挥发度的差异。
分馏效率可通过理论塔板数衡量，公式为：
$$
N = frac{lnleft(frac{x_D}{x_B}right)}{lnalpha}
$$
其中，(N)为理论塔板数，(x_D)和(x_B)为组分在馏出液和残液中的摩尔分数，(alpha)为相对挥发度。
分馏是化学工程和实验室中不可或缺的分离技术，高效且广泛应用于工业和科研领域。
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