Density of pure methanol
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Two-column distillation: What to do if the density of pure methanol is not within the specified range (too high)? 、、、? ? ?
Test the components to see if there are more of other substances; this requires a thorough analysis
After distillation in the two columns, there is more heavy fraction – could it be that the temperature at the top of the column is too high, or has the heating amount at the bottom of the column changed, or has there been a change in the feed conditions? Conduct a thorough investigation to rule out each possibility one by one.
There must be too much heavy component; the most likely one is water. Analyze the components to identify which one exceeds the limit, and then take action accordingly.
Density is not up to standard. The corresponding moisture level is also unsatisfactory. . If the heat remains constant. Check if too much has been harvested. The feed amount is less. The equilibrium inside the tower is disrupted if the moisture level is not high. . Check the temperature of the pre-tower top condenser. . . . Is potassium permanganate qualified? These are just the humble opinions of a beginner
Carefully check the material balance. Is there also a fusel oil extraction line? If the synthetic catalyst is used for an extended period of time, or if the temperature and space velocity are not properly controlled, this will affect the density of pure methanol, regardless of the operating parameters