High ethanol content in methanol
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What is the reason for the high ethanol content in finished methanol?
Analyze the content in the crude alcohol and compare it with that of the pure version
It is very likely that the ethanol content in crude methanol has already increased.
1. The synthesis reaction performance deteriorated, with a high content of crude alcohol ethanol, and the distillation system was not adjusted in a timely manner；
1. The synthesis reaction performance deteriorated, with a high ethanol content in the crude alcohol, and the distillation system was not adjusted in a timely manner； 2. The reflux ratio of the distillation system is low ； 3. The heavier components in the distillation product are carried upward in the extraction tower ； 4. Low recovery of fusel oil and alkane oil ； 5. Less water is used for extraction, resulting in an increase in complexes ； 6. Impure methanol mixed in the intermediate tank or finished product tank ； The above are merely personal opinions and for reference only.
1. Poor synthesis reaction, resulting in an increase in side reactions. 2. Delayed removal of wax (heavy components), leading to their accumulation over time and an upward shift in the concentration of heavy components. 3. Too low reflux ratio. 4. In three-column distillation, insufficient discharge of liquid from the bottom of the columns, causing the temperature there to rise and thus an increase in the concentration of heavy components
We use fusel oils to control the ethanol content, keeping it below 200 ppm
We generally only analyze the fusel content
The control of ethanol content in methanol depends mainly on the operation of the atmospheric pressure tower