用溶剂汽油、萘烷、石油醚按一定比例复配成混合型溶剂，以对茴香胺为原料，用该溶剂合成了3磺酸基对茴香胺，产品中不含致癌物。
The mixed solvent consists of solvent naphtha, decalin, and petroleum ether in a certain proportion, which was used to synthesize 3-sulfo p-anisidine by using p-anisidine as raw material.
蒸馏是去除重氮化合物、2萘胺1磺酸干扰的有效方法。
Distillation is effective to remove diazo compound and 2-naphthalin-1-sulfonic.
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