The relationship between the stability, water solubility, and boiling range of pure methanol
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As the title suggests, if the proportion of light components in the extracted pure methanol increases slightly, which of the properties of pure methanol—stability, water solubility, and boiling range—is affected first? What is the basis?
Is it because my questions are too basic that no one comes to answer them? Could someone from the technical team please let me know if they are aware of this?
From what I understand, the first factor to consider is the water solubility of pure methanol; light components also affect the boiling range, causing its temperature to decrease. The boiling range of pure methanol is primarily influenced by heavier components and fusel oils, which lead to an increase in its boiling temperature.
The effect on water solubility should be quite noticeable: an increase in the amount of light components makes the solution more turbid. Its boiling range remains essentially unchanged, as it is the light components that determine the initial boiling point, which is the lowest boiling point among all the substances present. Stability is a measure of the amount of reducing impurities in pure methanol; the more reducing substances are present in the mixture, the more significantly stability is affected.
The main factors affecting the stability of methanol are some reducing impurities, such as aldehydes, amines, and carbonyl compounds. The main factors affecting the water solubility of methanol are some alcohol-soluble impurities, such as C6-C15 alkanes and C6-C16 alcohols. Boiling range refers to the temperature between the initial boiling point and the dry point, and both light and heavy components have an impact on it. Generally, light components are mainly alkanes; therefore, when these light components are not completely removed, water solubility issues usually arise first. In more severe cases, stability and boiling range are also affected. This post was last edited by fyf0611 on 2009-4-4 15:12.]