The Institute of Technical Chemistry has synthesized and OAO Svyatogor Laboratory has studied new oxygen and nitrogen-containing collectors, namely, G-17 andG-18i, pertaining to the hydrazide class and intended for flotation of sulfde minerals of non-ferrous metals. The reagents have been tested on various types of Ural copper-zinc ores: on pyrite ores with fne distribution of copper and zinc sulfdes; and on oxidized copper-iron-vanadium ores.

As compared with traditionally used sulfhydryl collectors (potassium butylxanthogenate), G-18i hydrazide ensures 96.6% extraction of Cu and 95.7% extraction of zn, whereas potassium butylxanthogenate yields 94.09% and 94.23% extractions, respectively, with the same quantity of concentrates. The G-18i hydrazide is more selective to sulfide minerals in the presence of pyrite: with the use of hydrazides, flotation tails retain 74% of total sulfur, whereas flotation tails retain only 58–64% of sulfur with potassium butylxanthogenate.