In this study, strontium nitrate extraction from celestite in nitric acid solutions was investigated using the leaching method. The influences of acid concentration, solid-to-liquid ratio, stirring speed, and reaction...In this study, strontium nitrate extraction from celestite in nitric acid solutions was investigated using the leaching method. The influences of acid concentration, solid-to-liquid ratio, stirring speed, and reaction temperature on the leaching of strontium from celestite concentrate were studied. The results showed that the leaching rate increased with increasing acid concentration, stirring speed, and temperature and decreased with increasing solid-to-liquid ratio. The particle size was fixed in all of the dissolution experiments. The results showed that the stirring speed and the temperature were the most influential parameters with respect to the leaching process. The kinetic model best fit control by diffusion through the product layer. The activation energy of the dissolution celestite in nitric acid solutions was calculated to be 42.22 kJ/mol.展开更多
A new complex formed from strontium nitrate and 1,8-naphthyridine-N-oxide with a 1:2 stoichiometry has been synthesized and characterized by elemental analyses, infrared spectra, Raman spectra, fluorescence spectra, D...A new complex formed from strontium nitrate and 1,8-naphthyridine-N-oxide with a 1:2 stoichiometry has been synthesized and characterized by elemental analyses, infrared spectra, Raman spectra, fluorescence spectra, DTA-TG, solubility and molar conductance measurements. A single crystal X-ray structural analysis indicates that a kind of double bidentate and bridging nitrate group which has never been reported in literature is present in the new complex. The coordination number of the strontium ion is 10.展开更多
基金financially supported by the Science Research Project Committee of Manisa Celal Bayar University(No.BAP 2013–101)
文摘In this study, strontium nitrate extraction from celestite in nitric acid solutions was investigated using the leaching method. The influences of acid concentration, solid-to-liquid ratio, stirring speed, and reaction temperature on the leaching of strontium from celestite concentrate were studied. The results showed that the leaching rate increased with increasing acid concentration, stirring speed, and temperature and decreased with increasing solid-to-liquid ratio. The particle size was fixed in all of the dissolution experiments. The results showed that the stirring speed and the temperature were the most influential parameters with respect to the leaching process. The kinetic model best fit control by diffusion through the product layer. The activation energy of the dissolution celestite in nitric acid solutions was calculated to be 42.22 kJ/mol.
文摘A new complex formed from strontium nitrate and 1,8-naphthyridine-N-oxide with a 1:2 stoichiometry has been synthesized and characterized by elemental analyses, infrared spectra, Raman spectra, fluorescence spectra, DTA-TG, solubility and molar conductance measurements. A single crystal X-ray structural analysis indicates that a kind of double bidentate and bridging nitrate group which has never been reported in literature is present in the new complex. The coordination number of the strontium ion is 10.
