Extractive separation of micro amounts of rhenium from molybdenite by quinoline and a modified method of rhenium determination by α-furyl-dioxime

The extractive separation of rhenium(7) by quinoline in alkaline solution as well as a modification of the spectrophotometric method for the determination of micro amounts of rhenium in a molybdenite from copper-molybdenum ores from Mongolia, using α-furyldioxime has been developed. On the basis of the extractive separation method of perrhenate ion by quinoline from alkaline solution, rhenium has been determined in molybdenite. The molybdenite was decomposed by four different methods. Two of these decomposition methods, the fusion of Na2O2 with NaOH and the sintering of CaO with KMnO4 were found as the best ones. (author)