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to intensify the leaching process of rare earth(RE) and reduce the impurities in the leachate, ammonium chloride(NH4Cl) and ammonium nitrate(NH4NO3) were mixed as a compound leaching agent to treat...Process optimization of rare earth and aluminum leaching from weathered crust elution-deposited rare earth ore with compound ammonium salts何正艳1,张臻悦1,余军霞2,徐志高2,池汝安21. School of Minerals Processing......
and thermal decomposition. Dehydrated ammonium carnallite (MgCl2·NH4Cl·nH2O, n=0.5-1) is obtained at 160 ℃ for 4 h, suitable for preparation of anhydrous magnesium chloride. Kinetic parameters calculated...] ZHOU Ning-bo, CHEN Bai-zhen, HE Xin-kuai, et al. Preparation and characterization of anhydrous magnesium chloride with dehydrated ammonium carnallite[J]. Journal of Central South University......
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across the product layer and that the activation energy was 15 kJ/mol. YARTA?I and ?OPUR [18] studied the dissolution kinetics of malachite in ammonium chloride solution and a mathematical model.... EKMEKYAPAR and OYA [20] suggested that the dissolution rate of malachite in ammonium chloride solution was controlled by mixture kinetics and that the activation energy for the dissolution reaction......
and alkalinity or adding calcium oxide. Based on these works, we studied the dissolution kinetics of hemimorphite in ammonia/ammonium chloride systems [12,13]. The experimental data indicate that the ammonia/ammonium chloride system is appropriate for the leaching of complex zinc ores of both oxide and sulfide types. Unexpectedly, chloride ions can interact with most metal ions, and their use would......
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it is propitious to further purify the solution and recover RE. [ Keyword: bastnasite crude ore; ammonium chloride; rare earth; Received: 1999-11-15 氟碳铈矿是目前......
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; Invading track of chloride ions...; Abstract: Invading track of chloride ions and chloride ion distribution rule in cement-based materials were investigated by partially......
thermostat and vibrating bed were used to determine the solubility of hydroxyl manganese chloride in water, ammonium chloride and manganese chloride system, and the phase diagrams of multicomponent system were..., and extensive efforts on its basic theory and application were given out[1-4]. The new system mainly contains the decomposition of ammonium chloride into ammonia and hydrogen chloride at the presence of medium......
