硫酸によるバナジウムとクロムの分離
1967 年 16 巻 10 号 p. 1077-1078
詳細
1967 年 16 巻 10 号 p. 1077-1078
Almost any separation methods of vanadium and chromium had not been known by precipitating either one from the other, because of their resembling properties. It was reported previously by the author et al. that chromium was separated by the precipitation with sodium sulfide in the pH of 9.012.0 and this time the separation was carried out with sulfuric acid. Though VOSO4 and Cr2(SO4)3 are water soluble, chromium becomes hardly soluble by the evaporation to dryness and so both can be separatated by filtration. It is necessary to be in the form of V(IV) and Cr(III) that V(V) and Cr(VI) should be transfered by reduction and that V(II), V(III) and Cr(II) also by oxidation.
