石油亚砜是一种低毒、价廉的萃取剂。本文对石油亚砜对钼(Ⅵ)的萃取条件和反萃取条件以及萃取的机理进行了研究。结果表明,在室温下,石油亚砜对pH=1.0-2.0、钼(Ⅵ)浓度为0.01-0.1 M的一级萃取率E(%)达到90%以上;一级反萃率也在90%以上;乳化问题亦获得完满解决。经对萃取机理的初步研究,可以认为石油亚砜萃取铝(Ⅵ)是属于离子缔合型萃取体系,被萃物为: Sulfoxide is a low toxicity, cheap extractant. In this paper, the extraction conditions, extraction conditions and extraction mechanism of petroleum sulfoxide to molybdenum (Ⅵ) were studied. The results showed that the first-order extraction rate E (%) of petroleum sulfoxide was over 90% at pH = 1.0-2.0 and 0.01-0.1 M (Ⅵ) at room temperature. The first-stage stripping rate was also above 90% Above; emulsification problems have also been fully resolved. After a preliminary study of the extraction mechanism, it can be considered that the oil sulfoxide extraction of aluminum (Ⅵ) belongs to the ion association type extraction system.