The issue of methanol in the C4 fraction after MTBE etherification
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The MTBE plant does not have a methanol extraction and recovery system, which results in large amounts of methanol being present in the C4 fraction after etherification. What procedures or simple modifications can be implemented to ensure that the methanol content in this C4 fraction meets the required standards? Thank you so much!
Is the alcohol-to-olefin ratio appropriate? Is too much methanol being used? What is the level of the interface in the extraction tower? Is the operating pressure suitable? Is the methanol concentration in the depleted extraction water at the bottom of the methanol recovery tower above the acceptable limit? The above points are provided for reference only; a specific analysis is required for individual cases
To reduce the alcohol-to-olefin ratio at the raw material level, increase the external circulation volume of the reactor (if there is a circulation line), shut off the methanol supply line to the catalytic distillation column, appropriately lower the temperature of the sensitivity plate, or increase the top pressure of the catalytic distillation column as well as its circulation volume – these are the only adjustment methods available.
If the level is slightly above the limit, adjust Alkohylxib appropriately; try reducing the reactor temperature