PROCESS FOR PURIFIYNG TRIOXANE

摘要

A process for purifying trioxane comprising the step of feeding an organic solution containing at least one low-boiling impurity selected from the group consisting of methyl formate, methylal, formaldehyde and methanol, CH3O(CH2O)nCH3 (wherein n is 2 to 5) and trioxane to a distillation column to recover a distillate of pure trioxane and a distillate of trioxane containing CH3O(CH2O)nCH3 (wherein n is 2 to 5) by distillation separately; the step of bringing part or the whole of the distillate of trioxane containing CH3O(CH2O)nCH3 (wherein n is 2 to 5) into contact with a solid acid catalyst in the presence of water; the step of mixing the resulting distillate with a nonaqueous organic solvent and washing the obtained mixture with water to recover a trioxane-containing organic extract; and the step of returning this trioxane-containing organic extract to the above distillation column.