Impurity issues in crude methanol
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Dear friends: What are the components of impurities in crude methanol from methanol plants nowadays? Do any factories conduct full analysis? Some manufacturers include impurities such as C8H18 (octane) in the design; does this impurity have an impact on refined methanol oil? Please feel free to share your opinions actively. Thank you!
A full analysis can be performed; generally, it is carried out once every 2-3 days
Could I take a look at your factory’s analysis data? It is best to have a full analysis of the essential oils. What can be the ethanol content in denatured alcohol? Are there any other impurities? How much extraction water should be pre-added to the tower?
Ethanol content: 1000 ppm in crude methanol, 70 ppm in pure methanol; there are solid impurities present; the extraction water concentration is between 12% and 15%
During the synthesis of olefins, corresponding reformed substances are produced, such as paraffins, etc
It was found that the impurity content in the crude alcohol from various methanol plants varies greatly; some contain more octane, while others contain more ethanol. It should be related to the synthesis process of methanol and the type of synthesis catalyst used. When analyzing the pure methanol at the top of the pressurized tower and the atmospheric pressure tower, are other substances analyzed in addition to the ethanol content? Or is it that after analyzing ethanol and water, everything else is considered to be methanol?
Generally, density is used as the benchmark, while moisture and ethanol are considered separately. The composition of the crude alcohols varies significantly; we previously had a high amount of butanol, but the situation improved over time, and this is mainly due to the catalyst.
Okay, I roughly understand now. Thank you!