Abstract:The article describes the manufacture of titanium dioxide, or titania, on the basis of titanium tetrachloride. The main technological requirements for the production of titania are listed, the most prospective raw materials for the chlorination method are given, the description of the technological process for the yield of titania is described.
Despite its prevalence in the environment, the chemistry of the Ti 4 + ion has long been relegated to organic solutions or hydrolyzed TiO 2 polymorphs. A knowledge gap in stabilizing molecular Ti 4 + species in aqueous environments has prevented the use of this ion for various applications such as radioimaging, design of water-compatible metal-organic frameworks (MOFs), and aqueous-phase catalysis applications. Herein, we show a thorough thermodynamic screening of bidentate chelators with Ti 4 + in aqueous solution, as well as computational and structural analyses of key compounds. In addition, the hexadentate analogues of catechol (benzene-1,2-diol) and deferiprone (3-hydroxy-1,2-dimethyl-4(1H)-pyridone), TREN-CAM and THP Me respectively, were assessed for chelation of the 45 Ti isotope (t 1/2 = 3.08 h, β + = 85 %, E β + = 439 keV) towards positron emission tomography (PET) imaging applications. Both were found to have excellent capacity for kit-formulation, and [ 45 Ti]Ti-TREN-CAM was found to have remarkable stability in vivo.
Despite its prevalence in the environment, the chemistry of the Ti 4 + ion has long been relegated to organic solutions or hydrolyzed TiO 2 polymorphs. A knowledge gap in stabilizing molecular Ti 4 + species in aqueous environments has prevented the use of this ion for various applications such as radioimaging, design of water-compatible metal-organic frameworks (MOFs), and aqueous-phase catalysis applications. Herein, we show a thorough thermodynamic screening of bidentate chelators with Ti 4 + in aqueous solution, as well as computational and structural analyses of key compounds. In addition, the hexadentate analogues of catechol (benzene-1,2-diol) and deferiprone (3-hydroxy-1,2-dimethyl-4(1H)-pyridone), TREN-CAM and THP Me respectively, were assessed for chelation of the 45 Ti isotope (t 1/2 = 3.08 h, β + = 85 %, E β + = 439 keV) towards positron emission tomography (PET) imaging applications. Both were found to have excellent capacity for kit-formulation, and [ 45 Ti]Ti-TREN-CAM was found to have remarkable stability in vivo.
Despite its prevalence in the environment, the chemistry of the Ti4+ ion has long been relegated to organic solutions or hydrolyzed TiO2 polymorphs. A knowledge gap in stabilizing molecular Ti4+ species in aqueous environments has prevented the use of this ion for various applications such as radioimaging, design of water‐compatible metal–organic frameworks (MOFs), and aqueous‐phase catalysis applications. Herein, we show a thorough thermodynamic screening of bidentate chelators with Ti4+ in aqueous solution, as well as computational and structural analyses of key compounds. In addition, the hexadentate analogues of catechol (benzene‐1,2‐diol) and deferiprone (3‐hydroxy‐1,2‐dimethyl‐4(1H)‐pyridone), TREN‐CAM and THPMe respectively, were assessed for chelation of the 45Ti isotope (t1/2=3.08 h, β+=85 %, Eβ+=439 keV) towards positron emission tomography (PET) imaging applications. Both were found to have excellent capacity for kit‐formulation, and [45Ti]Ti‐TREN‐CAM was found to have remarkable stability in vivo.
The recovery of vanadium from titanium tetrachloride tail residue is a resource-efficient and environment-friendly method for treating hazardous vanadium-containing solid waste. In this study, to maximize the recovery rate of vanadium in the vanadium extraction process, the independent calcination and leaching factors were optimized using response surface methodology, in terms of calcination temperature (750–950 °C), calcination time (60–180 min), leaching liquid–solid ratio (5–25 mL/g), and leaching time (30–150 min). The results revealed that the calcination temperature was the most effective parameter for vanadium recovery, while the liquid–solid ratio was the least effective factor. Additionally, the optimal conditions were identified as a calcination temperature of 937 °C, a calcination time of 150 min, a leaching solid-to-liquid ratio of 17.4 mL/g, and a leaching time of 150 min. The maximum predicted recovery rate of vanadium by the model regression equation reached 93.1% and showed high credibility consistent with the experimental recovery rate of 93%.
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