Mechanism of PH3 absorption by Cu+-ILs/H2O two-liquid phase system

Beginning with the formation of the ionic liquid/water two-liquid phase catalytic system for absorption of PH 3 , we designed and synthesized Cu + -[Bmim]PF 6 , which has a hydrophobic property, and later formed a two-liquid phase system with Cu + -[Bmim]PF 6 and water, which has high PH 3 absorption efficiency, and an effective separation of the product and the catalyst was achieved. The effects of temperature and O 2 concentration on phosphine absorption, and the distribution of catalytic components and products in the ionic liquid/aqueous two-phase system were studied. Moreover, the mechanism of Cu + -ILs/water two-liquid phase catalytic oxidation of phosphine was discussed based on results from the analysis of FT-IR and ion chromatography . The results demonstrated that the optimum oxygen content in the reaction was 3%, and the optimum reaction temperature was 45   °C. Cu + -ILs/water two-liquid phase system has a high absorption efficiency for PH 3 , the absorption process is liquid phase catalytic oxidation and the product is H 3 PO 4 . The two-liquid phase system is semi-intelligent. The system can achieve high performance liquid phase catalytic oxidation of PH 3 , as well as automatic separation of H 3 PO 4 .