| 摘要 |
PURPOSE: A continuous production method of dialkyl carbonate is provided to improve purity of the dialkyl carbonate and lower content amount of aliphatic carbonate without requiring additional complex device. CONSTITUTION: A continuous production method of dialkyl carbonate comprises a step of purifying the dialkyl carbonate which is represented by chemical formula II under existence of alkylene oxide which is represented by chemical formula V and alkyl alcohol which is represented by chemical formula IV. An average retention time of dialkyl carbonate in the columns is 0.3-3 hours. In the chemical formulas, R^1 and R^2 respectively indicates linear substitution, branched substitution, or non-substituted C1-6 alkyl. R3 and R4 respectively indicate hydrogen, substituted or non-substituted C1-4 alkyl, substituted or non-substituted C2-4 alkenyl, or substituted or non-substituted C6-12 aryl.
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