vacuum distillation

简明释义

真空蒸馏

英英释义

例句

1.The vacuum distillation method allows for the separation of heat-sensitive materials without decomposition.

真空蒸馏方法可以在不分解的情况下分离热敏感材料。

2.In laboratories, vacuum distillation is employed to purify solvents that have high boiling points.

在实验室中，真空蒸馏用于提纯沸点较高的溶剂。

3.The pharmaceutical industry frequently uses vacuum distillation to isolate active ingredients from complex mixtures.

制药行业经常使用真空蒸馏从复杂混合物中分离活性成分。

4.We utilized vacuum distillation to extract essential oils from plants while preserving their fragrance.

我们利用真空蒸馏从植物中提取精油，同时保留其香气。

5.The process of vacuum distillation is often used in the petrochemical industry to separate crude oil into its components.

在石油化工行业，真空蒸馏工艺常用于将原油分离成其组成部分。

作文

In the world of chemistry and industrial processes, various techniques are employed to separate and purify substances. One such method that has gained significant attention is vacuum distillation. This technique is particularly valuable when dealing with heat-sensitive materials or when the boiling points of the components to be separated are very high. By reducing the pressure in the distillation apparatus, vacuum distillation allows for the separation of compounds at lower temperatures, thereby preventing thermal degradation and preserving the integrity of sensitive substances.The principle behind vacuum distillation is relatively straightforward. Under normal atmospheric pressure, liquids boil at their respective boiling points. However, when the pressure is lowered, the boiling point of a liquid decreases. This means that a substance can be vaporized at a much lower temperature than it would under standard conditions. For example, while water boils at 100 degrees Celsius at sea level, it can boil at 50 degrees Celsius or even lower if the pressure is significantly reduced. This property makes vacuum distillation an essential tool in the chemical industry, especially for the purification of organic compounds, essential oils, and other volatile substances.One of the most prominent applications of vacuum distillation is in the petroleum industry. Crude oil consists of a complex mixture of hydrocarbons, each with different boiling points. To refine crude oil into useful products such as gasoline, diesel, and jet fuel, it undergoes a series of distillation processes. The initial distillation is typically done at atmospheric pressure, but subsequent processes often utilize vacuum distillation to separate heavier fractions that require lower boiling points. This not only enhances the yield of valuable products but also minimizes the risk of thermal decomposition of sensitive compounds.Another significant application of vacuum distillation is in the production of high-purity solvents and chemicals. Many organic compounds, especially those used in pharmaceuticals, must be distilled to achieve the desired purity levels. Traditional distillation methods may not be suitable due to the risk of degrading the compound or forming unwanted by-products. By employing vacuum distillation, manufacturers can effectively separate and purify these compounds without compromising their quality.Moreover, vacuum distillation is also utilized in laboratories for the preparation of samples and the isolation of specific compounds. Researchers often need to distill small amounts of materials, and using this method allows them to do so efficiently while maintaining the integrity of the sample. This is particularly important in fields such as medicinal chemistry, where the purity of compounds can significantly affect the outcomes of experiments and subsequent applications.In conclusion, vacuum distillation is an invaluable technique in both industrial and laboratory settings. Its ability to separate and purify substances at lower temperatures makes it ideal for handling heat-sensitive materials and achieving high purity levels. As industries continue to evolve and demand more efficient and effective separation techniques, the role of vacuum distillation is likely to expand further, solidifying its importance in the field of chemistry and beyond.

在化学和工业过程的世界中，采用各种技术来分离和纯化物质。其中一种引起了广泛关注的方法是真空蒸馏。这种技术在处理热敏感材料或当要分离的组分的沸点非常高时特别有价值。通过降低蒸馏设备中的压力，真空蒸馏可以在较低的温度下分离化合物，从而防止热降解并保持敏感物质的完整性。真空蒸馏的原理相对简单。在正常大气压力下，液体在其各自的沸点处沸腾。然而，当压力降低时，液体的沸点会下降。这意味着一种物质可以在比标准条件下更低的温度下被蒸发。例如，水在海平面上以100摄氏度沸腾，但如果压力显著降低，它可以在50摄氏度甚至更低的温度下沸腾。这种特性使得真空蒸馏成为化学工业中的重要工具，特别是在有机化合物、精油和其他挥发性物质的纯化中。真空蒸馏最显著的应用之一是在石油工业中。原油由复杂的烃混合物组成，每种烃具有不同的沸点。为了将原油精炼成有用的产品，如汽油、柴油和喷气燃料，它经历一系列蒸馏过程。初始蒸馏通常在大气压力下进行，但随后的过程通常利用真空蒸馏来分离需要较低沸点的重组分。这不仅提高了有价值产品的产量，还最小化了敏感化合物热降解的风险。真空蒸馏的另一个重要应用是在高纯度溶剂和化学品的生产中。许多有机化合物，特别是用于制药的化合物，必须蒸馏以达到所需的纯度水平。传统的蒸馏方法可能不适合，因为存在降解化合物或形成不必要副产品的风险。通过使用真空蒸馏，制造商可以有效地分离和纯化这些化合物，而不会影响其质量。此外，真空蒸馏也被实验室用于样品的制备和特定化合物的分离。研究人员经常需要蒸馏少量材料，使用这种方法使他们能够高效地完成，同时保持样品的完整性。这在医药化学等领域尤为重要，因为化合物的纯度会显著影响实验的结果和后续的应用。总之，真空蒸馏在工业和实验室环境中都是一种无价的技术。它在较低温度下分离和纯化物质的能力使其非常适合处理热敏感材料并实现高纯度水平。随着工业的不断发展，对更高效、更有效的分离技术的需求日益增加，真空蒸馏的作用可能会进一步扩大，从而巩固其在化学及其他领域的重要性。