Patent ID: 6046358
Filing Date: 2000-04-04
Classification: C07C,C07F

Abstract:
A process which comprises:a) contacting an impure tetra(dihydrocarbylamino)phosphonium halide with a liquid cyclic ether under conditions effective to dissolve the tetra(dihydrocarbylamino)phosphonium halide and leave at least a portion of said impurities comprising at least quaternary ammonium halide or an amidophosphoxide remaining in the solid state;b) separating the solids and the liquid phase of a) from each other;c) mixing an anhydrous non-solvent for the tetra(dihydrocarbylamino)phosphonium halide with the liquid phase from b) to precipitate the tetra(dihydrocarbylamino)phosphonium halide; andd) separating the precipitated tetra(dihydrocarbylamino)phosphonium halide solids and the liquid phase of c) from each other.