<報文>硫酸溶液による磁硫鉄鉱の溶解速度

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In the absense of oxidizing conditions, the rate of dissolution of pyrrhotite with aqueous sulfuric acid was studied in the concentration range 0.25 to 1 mol/l and in the temperature range 30° to 80℃. The reaction products were hydrogen sulfide and dissolved iron, and the progress of the reaction was followed by an analysis of dissolved iron content in the solution. Under the condition of vigorous agitation to eliminate diffusion control of the reaction, the following results were obtained : i) The rate of dissolution with the lapse of reaction time showed the 2nd order relation to the concentration of suspended pyrrhotite in the solution. ii) The initial rate of dissolution was directly proportional to the total surface area of suspended pyrrhotite. iii) The rate of dissolution was proportional to the sulfuric acid concentration. iv) The activation energy of the reaction was 13.2 kcal/mol. Overall dissolution rate may be expressed by the following relation : [chemical formula]
東北大学の論文
1968-03-20