The stability of ionic liquid additive 1-butyl-3-methylimidazolium hydrogen sulfate ([BMIM]HSO4) during zinc electrowinning from acidic sulfate solution was investigated by cyclic voltammetry, electrochemical impeda...The stability of ionic liquid additive 1-butyl-3-methylimidazolium hydrogen sulfate ([BMIM]HSO4) during zinc electrowinning from acidic sulfate solution was investigated by cyclic voltammetry, electrochemical impedance spectroscopy and scanning electron microscopy. Compared with the traditional industrial additives, gelatine and gum arabic, [BMIM]HSO4 has more excellent chemical and thermal stabilities. The inhibition effects of gelatine and gum arabic on the zinc electrocrystallization are observed to markedly weaken due to their part degradation after 12 h longtime successive electrolysis and high temperature (90 ℃) treatments. In contrast, the activity of [BMIM]HSO4 is practically unaffected after 24 h longtime successive electrolysis and high temperature treatments. These results are corroborated with the corresponding morphological analysis of the cathodic deposits.展开更多
We first obtained by impregnating of the microsphere magnetic catalyst with salts of Thorium and of Uranium and examined the X-ray thorium-uranium catalyst for Fischer-Tropsch synthesis. Introduction in catalyst addit...We first obtained by impregnating of the microsphere magnetic catalyst with salts of Thorium and of Uranium and examined the X-ray thorium-uranium catalyst for Fischer-Tropsch synthesis. Introduction in catalyst additive thorium and uranium ions and manganese improves the thermal stability of the magnetic microsphere catalyst.展开更多
基金Project(2011FA009) supported by the Natural Science Foundation of Yunnan Province,ChinaProject(2011FZ020) supported by the Application Foundation Research of Yunnan Province,China
文摘The stability of ionic liquid additive 1-butyl-3-methylimidazolium hydrogen sulfate ([BMIM]HSO4) during zinc electrowinning from acidic sulfate solution was investigated by cyclic voltammetry, electrochemical impedance spectroscopy and scanning electron microscopy. Compared with the traditional industrial additives, gelatine and gum arabic, [BMIM]HSO4 has more excellent chemical and thermal stabilities. The inhibition effects of gelatine and gum arabic on the zinc electrocrystallization are observed to markedly weaken due to their part degradation after 12 h longtime successive electrolysis and high temperature (90 ℃) treatments. In contrast, the activity of [BMIM]HSO4 is practically unaffected after 24 h longtime successive electrolysis and high temperature treatments. These results are corroborated with the corresponding morphological analysis of the cathodic deposits.
文摘We first obtained by impregnating of the microsphere magnetic catalyst with salts of Thorium and of Uranium and examined the X-ray thorium-uranium catalyst for Fischer-Tropsch synthesis. Introduction in catalyst additive thorium and uranium ions and manganese improves the thermal stability of the magnetic microsphere catalyst.