[化工] 分餾
It can be separated from each other by ordinary fractional distillation.
兩者通過普通的分餾彼此分離。
Mathematical analysis on the refrigeratory system and fractional distillation system of the plant provides a basis for plant design.
文中對産冷、精餾系統進行了數學分析，為機組設計提供了理論依據。
The feasibility of recovery of naphthalene from the residue of fractional crystallization process by extractive distillation is discussed.
探讨了用萃取精餾法從分步結晶萘殘油中回收萘的可行性。
An apparatus for the fractional distillation of ethanol from fermentation on an industrial scale.
規模生産從氨基酸發酵中分餾蒸餾乙醇的裝置。
The main method of separation used in refineries is fractional distillation although further processing is normally required to produce marketable petroleum products.
分離石油主要采用的方法就是分餾，然後通過深加工才能得到可以銷售的石油産品。
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.
影響原油非均質性的主要成因類型有低熟原油的運移分餾作用、原油混合作用、邊水改造稠變作用和底水改造稠變作用等。
A colorless crystalline hydrocarbon, C14H10, obtained by fractional distillation of coal-tar oils and used in dyes, drugs, and explosives.
菲一種無色的晶體碳氫化合物，c14h10，通過蒸餾*********而少量地獲得，用于。
In your fractional distillation condenser.
或在分餾冷凝器。
A colorless, flammable liquid, C6H14, derived from the fractional distillation of petroleum and used as a solvent and as a.
已烷一種無色可燃液體，c6h14，從石油的分餾中提取，用作溶劑和低。
K. Neon, argon, and krypton are obtained from fractional distillation of liquid air.
氖、氩、氪都能夠通過分餾液态空氣獲得。
In fractional distillation, that part of the distillate which may be returned to the column to assist in ****** a better separation into desired fractions.
在分餾中被送回塔内促進更好分離成所需餾分的那部分餾分油。
A mole analysis of the separator liquid and gas samples is obtained usually by means of a fractional distillation column.
通常我們可以通過分裂蒸餾塔，對分離液、氣進行摩爾比分析。
The method avoids product fractionation in the prior coking fractional distillation column, thereby greatly reducing investment and operation cost.
該方法不需要原先的焦化分餾塔進行産品分餾，大大降低了投資和操作費用。
A mole analysis of the separator liquid and gas samples is obtained usually by means a fractional distillation column.
通常我們可以通過分裂蒸餾塔，對分離液、氣進行摩爾比分析。
The second variation type is called reversion evolution type, which represents the liquid segregation mainly with vapour-liquid fractional distillation.
②稱為反向演化類型，代表氣液分餾為主的液态分離；
Let's say you're doing a fractional distillation of some sort.
可以說我們是在,做某種分餾。
It occurs in minute amounts in the atmosphere and is obtained by fractional distillation of liquefied air.
大氣中含量極少，從液态空氣的蒸餾中可以得到。
Arsenic removal tests by means of oxidation and HCl extraction as well as fractional distillation were carried out.
開展了氧化除砷及鹽酸萃取除砷和精餾淨化的試驗；
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.
鉛、硫同位素研究認為從全岩到膠結物，鉛同位素發生了質量遷移和分餾作用；
Learning 4 sets of production unit: MTBE, fractional distillation, cracking and cracking by catalytic agent.
實習期間學習的四套裝置為MTBE，氣體分餾，重整和催化裂化裝置。
The main method of separation used in refineries is fractional distillation , although further processing is normally required to produce marketable petroleum products .
煉油廠所使用的主要分離方法是分餾，不過分餾所得一般都需要一步加工才能成為可供銷售的石油制品。
|dephlegmation/fractionating;[化工]分餾
分餾（Fractional Distillation）是一種基于液體混合物中各組分沸點差異進行分離的物理提純技術。其核心原理是通過連續加熱與冷凝循環，實現對沸點相近成分的高效分離。該技術廣泛應用于石油化工、化學制藥及實驗室研究等領域。
分餾過程主要依賴分餾柱結構設計，柱内填充物可增大氣液接觸面積，促使高沸點組分在上升過程中多次冷凝回流，低沸點組分則優先汽化進入冷凝器。以原油加工為例，分餾塔可依次分離出石油氣（<40℃）、汽油（40-200℃）、煤油（175-275℃）、柴油（250-350℃）和重油（>350℃）等産物。實驗室中常用該技術提純乙醇溶液，最高可獲得95.6%的乙醇純度。
該技術的數學表達式為： $$ Delta T = frac{P_A^circ - PB^circ}{P{total}} $$ 其中$Delta T$表示分離效率，$P_A^circ$和$PB^circ$分别為純組分A、B的蒸氣壓，$P{total}$為系統總壓。
參考文獻： 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（分餾） 是一種用于分離液體混合物的技術，尤其適用于沸點相近的組分。以下是詳細解釋：
分餾通過分餾柱實現多次汽化與冷凝的循環。混合物加熱後，揮發性較高的組分優先汽化，進入分餾柱。柱内溫度梯度使得蒸氣在上升過程中反複冷凝和再汽化，最終高沸點物質在柱底富集，低沸點物質在頂部冷凝收集。其核心原理是各組分揮發度的差異。
分餾效率可通過理論塔闆數衡量，公式為：
$$
N = frac{lnleft(frac{x_D}{x_B}right)}{lnalpha}
$$
其中，(N)為理論塔闆數，(x_D)和(x_B)為組分在餾出液和殘液中的摩爾分數，(alpha)為相對揮發度。
分餾是化學工程和實驗室中不可或缺的分離技術，高效且廣泛應用于工業和科研領域。
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