Which is more energy-efficient: producing dimethyl ether from crude methanol or refined methanol?
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As the title suggests, let’s discuss whether it is better to use crude methanol or refined methanol in the production of dimethyl ether via the vapor phase method
If produced jointly, using crude methanol saves energy； The technology works.
If crude methanol can be used, why use refined methanol? Sometimes, a slight increase in purity can lead to a significant rise in costs. . .
It is usually a two-step process, with refined methanol helping to save energy. But the costs need to be compared comprehensively.
It can’t be generalized; it depends on the grade of the dimethyl ether product. If producing AA-grade DME, high-purity methanol is the best choice.
It should be determined based on the requirements for dimethyl ether whether the raw material is pure methanol or crude methanol
It’s crude methanol; methanol distillation involves vaporizing methanol and then condensing it to produce refined methanol, and refined methanol needs to be vaporized once again in order to be converted into dimethyl ether. If crude methanol is used, it only needs to be vaporized once. There is also the consumption of circulating water for utility purposes related to the condensation of methanol vapor.
It’s crude methanol; methanol distillation involves vaporizing methanol and then condensing it to produce refined methanol, and refined methanol needs to be vaporized once again in order to be converted into dimethyl ether. If crude methanol is used, it only needs to be vaporized once. There is also the consumption of circulating water for utility purposes related to the condensation of methanol vapor. ! ! ! Yes, using crude methanol saves a lot of steam, resulting in lower costs.
Of course it’s crude alcohol! If crude alcohol meets the requirements, why use refined alcohol? Needless to say, for steam! How much silver does a single set of distillation equipment cost!