防老剂N-苯基-β萘胺是一个老牌胺类防老剂,有必要使其高纯化。区域熔融提纯方法已广泛应用于多种有机物质的提纯。采用自制区域熔融仪对工业品防老剂N-苯基-β萘胺进行提纯,制定了提纯工艺,并用高效液相法(HPLC)检测其纯度。试验结果:区域熔融提纯可成功地分离N-苯基-β萘胺的杂质,生产出高纯物质。工业品防老剂N-苯基-β萘胺的纯度为96%,而提纯品的纯度为99%。讨论了区域熔融提纯技术的原理、影响因素和提纯技术。 Antioxidant N-phenyl-β-naphthylamine is a veteran amine antioxidant, it is necessary to make it highly purified. Regional melt purification methods have been widely used in a variety of organic purification. Purification of N-phenyl-β-naphthylamine, an industrial antioxidant, was carried out by a self-made zone melting apparatus. The purification process was established and the purity of the product was determined by high performance liquid chromatography (HPLC). Experimental results: The regional melting purification can be successfully separated N-phenyl-β-naphthylamine impurities, to produce high purity material. The purity of the industrial antioxidant N-phenyl-β-naphthylamine was 96%, while the purity of the purified product was 99%. The principle, influencing factors and purification technology of regional melting purification technology are discussed.