Abstract
The 2,3,5-trimethyl-1,4-benzoquinone (TMQ), a significant intermediate product to synthesize vitamin E, is generally produced by the gas-liquid catalytic oxidation reaction of 2,3,6-trimethylphenol (TMP) and oxygen. However, the oxidation reaction rate was strongly limited by the mass transfer of oxygen from gas phase to liquid phase. In this work, a rotating packed bed (RPB) reactor with excellent mass transfer performance was applied for the catalytic oxidation of TMP to synthesize TMQ. Different effects of various operating conditions on the TMP conversion (X) and TMQ yield (Y) were investigated. Under the optimal conditions of the RPB reactor, the X and Y reached 99.28 % and 64.73 %, respectively. A comparison between different reactor combinations was also conducted. The RPB rector has a great application prospect for the industrial production of the catalytic oxidation of TMP.
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