Composite solvent, method and device for simultaneously separating naphthenic hydrocarbon and aromatic hydrocarbon from naphtha

The invention discloses a composite solvent, a method and a device suitable for simultaneously separating naphthenic hydrocarbon and aromatic hydrocarbon from naphtha, the composite solvent is formed by compounding dimethyl sulfoxide (I), cucurbituril (II) and 1-ethyl-3-methylimidazole ethyl sulfate salt (III), the mass compounding ratio of dimethyl sulfoxide (I) to cucurbituril (II) to 1-ethyl-3-methylimidazole ethyl sulfate salt (III) is (85-96): (3-14): 1, the selectivity of the composite solvent to naphthenic hydrocarbon can reach 6.27, and the selectivity of the composite solvent to naphthenic hydrocarbon can reach 6.27. The mass removal rate of the cycloalkane can reach 71.34%; the selectivity of aromatic hydrocarbon can reach 36.16, and the mass removal rate of aromatic hydrocarbon is 91.51%. The method has the characteristics that cyclic compounds such as cycloalkane and aromatic hydrocarbon in naphtha are enriched at the bottom of the reactor by utilizing the special structure and characteristics of