Methanol distillation has color
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Dear friends, has anyone ever done methanol distillation? We obtain methanol by distilling it from a methanol-water solution; the methanol-water solution is yellow, and the methanol obtained through distillation is also yellow. What is the reason for this, and how can we remove the color? Thank you!
Analyze it to see what substance it is and whether any oils are mixed in; distillation can yield relatively pure methanol
It is first necessary to determine whether it is a synthesis issue or a distillation issue. If the crude methanol at the outlet of the synthesis separator is yellow, then it is a problem related to the synthesis process or the preceding stages. In the case of distillation, it is necessary to check whether components such as circulating water or alkalis have leaked into the distillation system.
The failure to meet the chromaticity standards is definitely caused by the presence of impurities. What was said above is correct – start by eliminating those media from which impurities might originate, and conduct an analysis to determine what kind of impurities they are. Also, is the tower in your facility new? ? ? Is it a problem within the tower, such as rust inside the tower?