Disclosed is a method for removing impurities from products derived from oxidation of an ortho-dialkylaromatic compound which comprises at least one step selected from the group consisting of extraction of an aqueous solution comprising aromatic dicarboxylic acid product with an organic solvent and extraction of an organic solution comprising aromatic anhydride product with an aqueous bicarbonate solution for a time period insufficient to allow hydrolysis of anhydride to acid.
本发明公开了一种从邻位二烷基芳香族化合物氧化产物中去除杂质的方法,该方法至少包括一个步骤,该步骤选自以下组别:用有机溶剂萃取包含芳香族二
羧酸产物的
水溶液,以及用
碳酸氢盐
水溶液萃取包含芳香族酸酐产物的有机溶液,萃取时间不足以使酸酐
水解为酸。