An. Turanov et al., Tetraphenylalkylenediphosphine dioxides as extractants of palladium from nitric acid solutions, RUSS J G CH, 69(7), 1999, pp. 1075-1080
A complete series of tetraphenyl-alpha,omega-alkanediyldiphosphine dioxides
Ph2P(O)(CH2)(n)P(O)Ph-2 (n = 1-10) was synthesized, and their extraction p
roperties were studied. 1,5-Bis(diphenylphosphinoyl)pentane showed the high
est extraction ability with respect to palladium. A synergistic effect was
observed in the extraction of palladium with toluene solutions of 1,5-bis(d
iphenylphosphinoyl)pentane in the presence of tributyl phosphate.