Experimental Study of Catalytic Oxidation of Phosphine with Palladium-Based Ionic Liquid

摘要

This study is to obtain the maximum depuration efficiency as a criterion and select the Pd-IL which was used as a catalyst and reaction medium of catalytic oxidation to purify phosphine. The monomer of catalyst [bmim]Cl was characterized by NMR; the conformational analysis of catalyst was carried out by FT-IR. The influences of temperature, oxygen content, different proportion of [bmim]Cl and PdCl_2, flow rate on the purification efficiency of PH_3 were explored. The results illustrate the catalyst of target ionic liquid has excellent selectivity and high stability. Palladium-based ionic liquid catalytic system show high activity in the catalytic oxidation of phosphine. Under the optimum reaction conditions, the purification efficiency of PH_3 could stay above 99% for a long time and so was the regeneration solution. Palladium-based ionic liquid catalytic system will greatly promote the PH_3 selective depth of purification technology and the formation of the theory.