Discussion on distillation
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What is the light component in a methanol distillation system? What is a reconstituent? What temperature is optimal for distillation? :hug: This post was last edited by “The Earth keeps spinning” on Feb 6, 2009 at 13:35.]
What distillation are you asking about? Different products have different components.
Are you referring to the regeneration tower, or the methanol-water separation tower?
Above the feed inlet of the distillation column is the distillation section, while below the feed inlet is the stripping section. The function of the distillation section is to gradually increase the concentration of the volatile components in the gas phase from bottom to top, that is, to concentrate the light components. The function of the stripping section is to gradually increase the concentration of the poorly volatile components, that is, the concentrated heavy components, in the liquid phase from top to bottom. It’s hard to answer regarding temperature because the question is too general
Can we analyze each tower one by one? How should I put it generally? The pre-tower is mainly used to remove the light components, while the pressure tower and the atmospheric pressure tower are primarily used to remove the heavy components. There are three towers in total; you can take a look at what temperature control is required in each tower for the effective separation of light and heavy components. Is my question that difficult? :L Everyone can discuss the operating temperature and methods; each tower can be explained one by one. Components of crude methanol arranged in order of boiling point Component Boiling point Component Boiling point Component Boiling point Dimethyl ether –23.7 Methanol 64.7 Isopropanol 107 Acetaldehyde 20.2 Isopropyl ether 67.5 n-Butanol 117.7 Methyl formate 31.3 n-Hexane 69.0 Isobutyl ether 122.3 Diacetaldehyde 34.6 Ethanol 78.4 Diisopropyl ether 123.7 n-Pentane 36.4 Propanone 79.6 n-Octane 126 Propionaldehyde 48.0 n-Pentanol 97 Isopentanol 130 Acrolein 52.6 n-Heptane 98 4-Methylpentanol 131.0 Methyl acetate 54.1 Water 100 n-Pentanol 133 Propane 58.5 Propyl isopropyl ether 101.7 n-Nonane 160.7 Isobutyraldehyde 64.5 Acetic acid 103.0 n-Decane 174.9 Last edited by Earth Turns Every Day on 2009-2-9 11:14]
In methanol distillation, the boiling point of methanol is used as the boundary to distinguish between light and heavy components. Substances with a boiling point lower than that of methanol are considered light components, such as dimethyl ether and propanol, while substances with a boiling point higher than that of methanol are regarded as heavy components, such as ethanol, n-butanol, and water.
I think the quality of distillation depends mainly on controlling the operating temperature. When operating a distillation tower, it is necessary to take into account the temperature difference of the working medium, and select the optimal operating temperature within that range. Too high a temperature is not good for distillation, and too low a temperature is also not favorable for it~