| 摘要 |
<p>1359177 Recovery of rhenium and platinum values UNIVERSAL OIL PRODUCTS CO 11 Nov 1971 [12 Nov 1970] 52451/71 Heading C1A Rhenium and platinum values are recovered from a spent catalyst comprising rhenium and a platinum group metal composited with a refractory inorganic oxide such as alumina by (a) Treating the spent catalyst with a strong mineral acid, e.g. sulphuric acid to produce an acidic rhenium-containing solution and a platinum group metal-containing residue. (b) Separating said residue and recovering the platinum group metal therefrom as chloroplatinic acid. (c) Passing the rhenium-containing solution in contact with the sulphate ionic form of an anionic exchange resin and effecting adsorption of rhenium thereon, and. (d) Recovering the rhenium by elution from the said resin with hydrochloric acid or perchloric acid. The rhenium is recovered as perhennic acid and/or soluble chlorides.</p> |
