<報文>銅スラグ中の硫化鉄, 硫化銅, 酸化第一鉄および酸化第二鉄の定量

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The determination of the components of copper slag was investigated by use of bromine-methylalcohol solution as a selective dissolving agent of sulfides. At room temperature sulfides were completely dissolved in bromine-methylalcohol solution, but oxides were not dissolved in this solution. Therefore, ferrous and copper sulfides were determined from this solution extracted the sulfide components from copper slag at room temperature, and ferrous and ferric oxides were determined from this residue after dissolving it with hydrochloric acid in nitrogen atmosphere. After filtration, bromine-methylalcohol solution was evaporated up repeatedly in order to remove bromine and methylalcohol, and after dissolving this residue in 0.1 N hydrochloric acid, sulfate and metallic ions were separated with cation exchange resin Amberlite IR-120 (H-form). Sulfate ion in effluent was estimated by barium chloride-sodium sulfate titration method with sodium rhodizonate indicator, and copper was estimated by diethyldithiocarbamate method after eluting with 6 N hydrochloric acid from resin column. Ferrous and ferric oxides were determined directly by potassium permanganate method and by iodometry respectively.
東北大学の論文
1966-09-20