Why is sulfolane solvent not easily decomposed under negative pressure?
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Why is sulfolane less prone to decomposition when operated under negative pressure – is it because the negative pressure lowers its decomposition temperature? Is it because of some other reason?
Sulfolane begins to decompose at 180 in the extraction tower, decomposes rapidly at 200, and decomposes completely at 220.
For example, at normal pressure the system may need to reach 180°C to achieve the desired vaporization state, while under negative pressure it might reach that state at 170°C; with the same outcome, the operating temperature is simply reduced.
Under normal negative pressure conditions, the temperature is not very high; the system has good sealing properties and does not contain oxygen, so it is not prone to decomposition.
Negative pressure lowers the boiling point of mixed aromatics, allowing the aromatics to be stripped at lower temperatures thereby enabling solvent recovery. Under normal circumstances, we should encounter such a situation: in places with high pressure like the Tibetan Plateau, it is generally difficult to bring water to a boil, as the boiling point of water exceeds 100 degrees
Isn’t the Tibetan Plateau a low-pressure area? The water boils before reaching 100 degrees, so isn’t that the opposite of what should be the case? Shock me