<報文>黄鉄鉱に対するエチルキサントゲン酸イオンの反応および抑制作用

概要

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The behavior of ethylxanthate ion and depressants on pyrite were studied thermochemically. The heats evolved were obtained by using a liquid column chromatograph as the continuous flow calorimeter. The results are summarized as follows : 1) The thermograms obtained by adsorption of ethylxanthate ion on pyrite do not show the same characteristic form as that obtained by ethylxanthate ion on copper-activated sphalerite. It is interpreted from the configuration of the adsorption thermograms and the increase of pH values of its solution that the adsorbed ethylxanthate ion forms ethyldixanthogen or decomposes to alcohol and carbon disulphide. 2) The heats evolved by the reaction of ethylxanthate ion on pyrite increase considerably by the oxidation of pyrite. 3) The difference in configuration of ethylxanthate adsorption thermograms between copper-activated pyrite and unactivated one is not detected, but it is detected in the case of desorption. Therefore, a mechanism of activation of cupric ion on pyrite differs from that of sphalerite. 4) Both OH^- ion and CN^- ion can remove adsorbed ethy-xanthate from pyrite, and then the heats evolved by desorption in the first part are less than that of fresh pyrite. But, after adsorbed ethylxanthate left out from the surface of pyrite, the heats evolved agree with that of fresh pyrite.
東北大学の論文
1973-03-30