The problem of selection of an adequate filter for filtration of TBP (tributyl phosphate) slurex raffinate is discussed. Pilot plant data are presented concerning test work with settling of slurries, filtrations on a 0.1 ft/ sup 2/ test leaf, Feinc filtrations, pressure tube filtrations, and Oliver precoat filtrations. Process recommendations and limitations are presented for use of an Oliver precoat filter. (auth)