To provide a process for preparing phosphine oxides comprising reacting iminophosphoranes with phosphorus oxytrichloride by which highly purified phosphine oxides can be obtained industrially in a higher yield.
Specifically, phosphine oxides are prepared in such a manner that iminophosphoranes are reacted with phosphorus oxytrichloride using an aprotic organic solvent with permittivity 2.2 or more at 20° C. as a solvent under special reaction conditions to give a liquid reaction product containing phosphine oxides and aminophosphonium chlorides which are yielded as a by-product at the same time as the phosphine oxides, and the above described chlorides are removed from the above described liquid reaction product by the solid-liquid separation process, and the solution having been subjected to the solid-liquid separation process is washed with water.
提供一种制备膦氧化物的方法,包括通过将
亚胺膦与
三氯氧磷反应来制备膦氧化物,从而可以在较高的收率下工业上获得高度纯化的膦氧化物。具体地,通过在特殊反应条件下,使用介电常数在20°C时为2.2或更高的无极性有机溶剂作为溶剂,将
亚胺膦与
三氯氧磷反应,以得到含有膦氧化物和同时产生的
氨基膦
铵氯化物的液体反应产物,然后通过固液分离过程去除上述所述的
氯化物,最后用
水洗涤经过固液分离处理的溶液。