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(Daily Question) Coal-to-oil and olefins forum, 3/22/2018

2018-03-22 View Original

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3.jpg Participation: Prize of 5 Wealth; Correct answer: Reward of 10 wealth points ; Note: This post is valid for 48 hours. Question: (DMTO) Olefin Separation Unit: What is the principle of methanol thawing? Since methanol has a melting point of -97.8 degrees, mixing it with water lowers the freezing point of water, thereby reducing the initial temperature at which hydrocarbon-water hydrates form. Moreover, it is highly soluble in water and thus flows out of the system. Note: The answer will be announced automatically in two days!
Reply #2 2018-03-22
Since methanol has a melting point (freezing point) of –97.8°C and is highly soluble in water, mixing it with water lowers the freezing point of water, which in turn reduces the initial temperature at which hydrocarbon-water hydrates form. Injecting methanol into gas transmission pipelines helps to prevent freezing in such pipelines.
Reply #3 2018-03-22
Methanol has a low freezing point; its hydrates have a low freezing point as well; it is compatible with water, and it has a low melting point. 1. Solubility is a fundamental physical property of methanol as an antifreeze and de-icing agent. 2. A low melting point is the key property of methanol as an antifreeze and degelant.
Reply #4 2018-03-22
Since methanol has a melting point (freezing point) of around minus 100 degrees and is highly soluble in water, mixing it with water lowers the freezing point of water, thereby reducing the initial temperature at which hydrocarbon-water hydrates form. Injecting methanol into gas transmission pipelines helps to prevent freezing in such pipelines.
Reply #5 2018-03-22
Methanol has a low freezing point; its hydrates have a low freezing point as well; it is compatible with water, and it has a low melting point. 1. Solubility is a fundamental physical property of methanol as an antifreeze and de-icing agent. 2. A low melting point is the key property of methanol as an antifreeze and degelant.
Reply #6 2018-03-22
Since methanol has a melting point (freezing point) of around minus 100 degrees and is highly soluble in water, mixing it with water lowers the freezing point of water, which in turn reduces the initial temperature at which hydrocarbon-water hydrates form. Injecting methanol into gas transmission pipelines helps to prevent freezing in such pipelines
Reply #7 2018-03-22
Since methanol has a melting point (freezing point) of –97.8°C and is highly soluble in water, mixing it with water lowers the freezing point of water, which in turn reduces the initial temperature at which hydrocarbon-water hydrates form. Injecting methanol into gas transmission pipelines helps to prevent freezing in such pipelines.
Reply #8 2018-03-22
Since methanol has a melting point (freezing point) of –97.8°C and is highly soluble in water, mixing it with water lowers the freezing point of water, which in turn reduces the initial temperature at which hydrocarbon-water hydrates form. Injecting methanol into gas transmission pipelines helps to prevent freezing in such pipelines.
Reply #9 2018-03-23
Since methanol has a melting point (freezing point) of –97.8°C and is highly soluble in water, mixing it with water lowers the freezing point of water, thereby reducing the initial temperature at which hydrocarbon-water hydrates form. Injecting methanol into gas transmission pipelines helps to prevent freezing in such pipelines
Reply #10 2018-03-23
The freezing point of 20% methanol is -14.5 degrees, while that of 30% methanol is -25.9 degrees. Thawing is achieved by lowering the freezing point.

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