vacuum distillation

简明释义

真空蒸馏

英英释义

例句

1.In the lab, we used vacuum distillation to purify the organic compound efficiently.

在实验室中，我们使用真空蒸馏高效地纯化有机化合物。

2.By utilizing vacuum distillation, we can recover valuable solvents from waste materials.

通过利用真空蒸馏，我们可以从废料中回收有价值的溶剂。

3.The oil refinery employs vacuum distillation to separate heavier fractions from crude oil.

这家石油炼油厂采用真空蒸馏来分离原油中的重质组分。

4.During the production of essential oils, vacuum distillation is often preferred to preserve the aroma.

在精油生产过程中，通常优先选择真空蒸馏以保持香气。

5.The process of vacuum distillation helps in reducing the boiling point of liquids.

真空蒸馏过程有助于降低液体的沸点。

作文

Vacuum distillation is a widely used separation technique in the field of chemistry and chemical engineering. It involves the separation of components in a liquid mixture by lowering the pressure within the distillation apparatus. This process allows for the distillation of substances at lower temperatures than their normal boiling points, which can be particularly advantageous for heat-sensitive materials. The primary advantage of vacuum distillation (真空蒸馏) is that it minimizes thermal decomposition, making it ideal for purifying organic compounds that might degrade or react undesirably at higher temperatures.The basic principle behind vacuum distillation (真空蒸馏) is that when the pressure above a liquid is reduced, the boiling point of that liquid decreases. This means that a substance can boil and subsequently vaporize at a much lower temperature than it would under atmospheric pressure. For example, water boils at 100 degrees Celsius at sea level, but under a vacuum, it can boil at room temperature or even lower. This property is particularly useful in industries where heat-sensitive products are processed, such as pharmaceuticals, food production, and petrochemicals.In a typical vacuum distillation (真空蒸馏) setup, the mixture is placed in a distillation flask, which is then connected to a vacuum pump. The vacuum pump removes air from the system, creating a low-pressure environment. As the temperature of the mixture is raised, the component with the lowest boiling point will vaporize first. The vapor is then condensed back into a liquid in a separate receiving flask, allowing for the collection of purified material. This method not only enhances the purity of the distillate but also increases the yield as less product is lost to thermal degradation.There are several applications of vacuum distillation (真空蒸馏) across various industries. In the petrochemical industry, it is used to separate crude oil into its various fractions, such as gasoline, diesel, and kerosene, without breaking down sensitive compounds. In the pharmaceutical industry, vacuum distillation (真空蒸馏) is employed to purify active pharmaceutical ingredients (APIs) while maintaining their integrity. Additionally, in the food industry, this technique can be utilized to concentrate flavors or extract essential oils without compromising their quality.Despite its advantages, vacuum distillation (真空蒸馏) does come with some challenges. The equipment required can be more complex and expensive compared to traditional distillation methods. Furthermore, careful monitoring of the pressure and temperature is essential to ensure optimal separation and prevent the formation of unwanted byproducts. Operators must also be trained to handle the equipment safely, as working under vacuum conditions carries inherent risks.In conclusion, vacuum distillation (真空蒸馏) is an essential technique in modern chemistry that allows for efficient separation of heat-sensitive compounds. Its ability to operate at lower temperatures opens up new possibilities for the purification of various substances while preserving their chemical integrity. As industries continue to innovate and seek more efficient processes, the role of vacuum distillation (真空蒸馏) will undoubtedly remain significant in the future.