含有硝酸和乙酸的混合物用一氧化氮处理以将大部分硝酸还原为过氧化氮,并将过氧化氮和乙酸进行分离。如果待处理的混合物含有水,优选首先处理,如果需要,将其含水量降低至每摩尔硝酸不超过1.5摩尔。更优选地,将含有硝酸和乙酸的含水混合物进行蒸馏,以得到含有约1mol的硝酸和2摩尔乙酸的共沸混合物的塔底产物,包含所有水和超过 The mixture containing nitric acid and acetic acid is treated with nitric oxide to reduce most of the nitric acid to nitrogen peroxide and the nitrogenous oxide and acetic acid are separated. If the mixture to be treated contains water, it is preferably treated first and, if necessary, its water content is reduced to no more than 1.5 mol per mol of nitric acid. More preferably, the aqueous mixture containing nitric acid and acetic acid is distilled to give a bottoms product containing about 1 mol of an azeotropic mixture of nitric acid and 2 mol of acetic acid, containing all water and exceeding