Feed temperature of methanol to formaldehyde absorption tower
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Since gaseous formaldehyde tends to polymerize on its own, in actual production, to prevent such polymerization, the temperature of the gas stream at the reactor outlet is kept very high. Therefore, during the oxidation of methanol to formaldehyde, what minimum temperature should the gas stream containing methanol, formaldehyde, oxygen, etc., at the reactor outlet have before it enters the formaldehyde absorption tower, or what range is appropriate for controlling this temperature?
Generally, 120 degrees or more is required, but polyformaldehyde tends to accumulate on the pipe walls over time.
Depending on the conditions of the formaldehyde plant, the outlet temperature of the oxidation furnace should be reduced as much as possible to lower the load on the absorption tower. 100~150℃ is appropriate.