azeotrope

简明释义

英[əˈziːəˌtrəʊp]美[ˈeziəˌtrop]

n. [化学] 恒沸物；共沸混合物

英英释义

单词用法

同义词

反义词

例句

1.The separation of azeotrope of methyl ethyl ketone water has been investigated by extractive distillation using the mixture of ethylene glycol and potassium acetate as an extractant.

结果表明乙二醇与醋酸钾的混合物是分离甲乙酮水二元恒沸物的理想萃取剂。

2.On this base, the suggestion is put forward on optimization of azeotrope tower operation adjustment to reduce the operation cost.

在此基础上，提出了降低运行费用的共沸塔操作调整的优化方向。

3.Azeotrope compositions comprising 2,3,3,3-tetrafluoropropene and hydrogen fluoride and uses thereof.

包含2，3，3，3-四氟丙烯和氟化氢的共沸物组合物及其用途。

4.Butanone can be miscible with water under low temperature, and formed azeotrope when distillation, making the separation of butanone and water difficulty.

丁酮与水常温下部分互溶，蒸馏时又形成共沸物，给丁酮-水的分离带来了困难。

5.Vapor-liquid equilibria and separation of methanol-dimethyl carbonate azeotrope are(reviewed) in this paper.

综述了碳酸二甲酯-甲醇二元共沸物汽液平衡和分离方法的最新研究进展。

6.Toluene is used as azeotrope in the preparation of ketal.

缩酮制备时，采用甲苯为共沸剂；

7.And a negative azeotrope here.

这时就是一个负的共沸混合物。

8.The alcohol treatment mechanism is that the invaded water can be removed by decreasing surface tension and forming low boiling point azeotrope.

这是因为醇可以减小表面张力，与水或水和烃形成低沸点共沸物，将侵入的水排出。

9.In distillation, an azeotrope 共沸物 can complicate the separation of components.

在蒸馏过程中，azeotrope 共沸物 可能会使成分的分离变得复杂。

10.The ethanol-water mixture forms an azeotrope 共沸物 at a specific concentration, making it difficult to purify ethanol.

乙醇-水混合物在特定浓度下形成 azeotrope 共沸物，使得纯化乙醇变得困难。

11.Chemists often study azeotropes 共沸物 to improve separation techniques in organic synthesis.

化学家们经常研究 azeotropes 共沸物 以改进有机合成中的分离技术。

12.When two liquids form an azeotrope 共沸物, they boil at a constant temperature.

当两种液体形成 azeotrope 共沸物 时，它们在恒定温度下沸腾。

13.The presence of an azeotrope 共沸物 can limit the effectiveness of fractional distillation.

共沸物的存在可能会限制分馏蒸馏的有效性。

作文

In the field of chemistry, the concept of an azeotrope is a fascinating and complex phenomenon that plays a crucial role in the distillation process. An azeotrope is defined as a mixture of two or more liquids that has a constant boiling point and composition throughout the distillation process. This means that when the mixture is heated, it vaporizes at a specific ratio, and the vapor produced has the same composition as the liquid mixture. This unique behavior poses challenges for separation processes, especially in industries such as pharmaceuticals, petrochemicals, and alcohol production. To better understand the significance of azeotropes, let’s consider a practical example: the distillation of ethanol and water. When these two substances are mixed, they form an azeotrope at approximately 95% ethanol and 5% water by volume. At this concentration, the mixture boils at a lower temperature than either pure ethanol or pure water. As a result, during the distillation process, one cannot obtain pure ethanol simply by boiling the mixture. Instead, the azeotrope will distill off, maintaining its composition until all the liquid has been vaporized. This characteristic makes it impossible to achieve complete separation using standard distillation methods. The presence of azeotropes can be both beneficial and detrimental, depending on the context. In some cases, they can simplify the distillation process by providing a stable boiling point, which can be advantageous in certain industrial applications. However, in many situations, the existence of an azeotrope complicates the purification of desired components, necessitating the use of alternative separation techniques such as azeotropic distillation or the addition of third components to break the azeotrope. Furthermore, azeotropes are not limited to just ethanol and water; they can occur with various other mixtures as well. For instance, the combination of hydrochloric acid and water also forms an azeotrope, which further illustrates the widespread occurrence of this phenomenon in chemical processes. Understanding the behavior of azeotropes is essential for chemists and engineers alike, as it directly impacts the efficiency and effectiveness of separation techniques. In conclusion, the study of azeotropes is vital for anyone involved in the field of chemistry. Their unique properties present both challenges and opportunities in the distillation process. By mastering the understanding of azeotropes, scientists and engineers can develop more efficient methods for separating mixtures, ultimately leading to advancements in various industries. As we continue to explore the intricacies of chemical mixtures, the importance of azeotropes will undoubtedly remain a significant area of focus in chemical research and application.

在化学领域，共沸物的概念是一个引人入胜且复杂的现象，在蒸馏过程中发挥着至关重要的作用。共沸物被定义为两种或多种液体的混合物，其在整个蒸馏过程中具有恒定的沸点和组成。这意味着当混合物被加热时，它以特定的比例蒸发，产生的蒸气与液体混合物的组成相同。这种独特的行为给分离过程带来了挑战，尤其是在制药、石油化工和酒精生产等行业。 为了更好地理解共沸物的重要性，让我们考虑一个实际的例子：乙醇和水的蒸馏。当这两种物质混合时，它们在大约95%乙醇和5%水的体积比下形成了一个共沸物。在这个浓度下，混合物以比纯乙醇或纯水更低的温度沸腾。因此，在蒸馏过程中，人们无法仅通过加热混合物来获得纯乙醇。相反，共沸物将蒸发，保持其组成，直到所有液体都被蒸发。这一特性使得使用标准蒸馏方法实现完全分离变得不可能。 共沸物的存在在某些情况下可以是有利的，也可以是有害的，这取决于具体的情境。在某些工业应用中，它们可以通过提供稳定的沸点来简化蒸馏过程。然而，在许多情况下，共沸物的存在使得所需成分的纯化变得复杂，从而需要使用替代的分离技术，如共沸蒸馏或添加第三组分以打破共沸物。 此外，共沸物并不仅限于乙醇和水；它们也可以与其他多种混合物发生。例如，盐酸和水的组合也形成了一个共沸物，这进一步说明了这一现象在化学过程中的广泛发生。理解共沸物的行为对化学家和工程师来说至关重要，因为它直接影响到分离技术的效率和有效性。 总之，研究共沸物对于任何参与化学领域的人来说都是至关重要的。它们独特的性质在蒸馏过程中带来了挑战和机遇。通过掌握对共沸物的理解，科学家和工程师可以开发出更有效的分离混合物的方法，最终推动各个行业的进步。随着我们继续探索化学混合物的复杂性，共沸物的重要性无疑将继续成为化学研究和应用的一个重要关注领域。