The extraction Ru complexes with nonferrous metals by different-radical phosphine oxide (POR) and diphenyl-N, N-dibutylcarbamoylmethylene phospine oxide (Ph₂Bu₂) from simulated solutions and actual radioactive wastes was studied. It was shown that ruthenium can be extracted from acidic wastes together with actinides not only by POR but by Ph₂Bu₂ as well.