Lanthanum Chloride

2021 ◽  
Keyword(s):  
Lanthanum Chloride

Thermisches Verhalten von festem LaAlCl6 und chemischer Transport von LaCl3 mit AlCl3/Thermical Behaviour of Solid LaAlCl6 and Chemical Transport of LaCl3 with AlCl3

1999 ◽  
Vol 54 (11) ◽  
pp. 1410-1416 ◽  
Author(s):  
H. Oppermann ◽  
H. Dao Quoc ◽  
A. Morgenstern
Keyword(s):  
Total Pressure ◽  
Chemical Transport ◽  
Lanthanum Chloride ◽  
Pressure Measurements ◽  
Melting Diagram

The thermodynamical data of solid aluminium lanthanum chloride LaAlCl6 have been obtained by determination of the decomposition equilibria from total pressure measurements. The melting diagram was determined by DTA. The chemical transport of LaCl3 with AlCl3 is suggesting the existence of the gaseous complex LaAl3Cl12. The data are:ΔH(LaAlCl6f,298) =-427,1 ±2,5 kcal/mol, S°(LaAlCl6,f,298) = 61 ±2,5 cal/K-mol,Δ(LaAl3Cl12,g ,298) =-712 ± 7 kcal/mol, S°(LaAl3Cl12,g,298) = 205 ± 3 cal/K-mol.

Synthesis of Lanthanum Oxide Using Hydrogen Peroxide as Auxiliary Reagent by Spray Pyrolysis Method

2014 ◽  
Vol 1081 ◽  
pp. 38-42
Author(s):  
Zhen Feng Wang ◽  
Wen Yuan Wu ◽  
Xue Bian ◽  
Shou Feng Xue
Keyword(s):  
Hydrogen Peroxide ◽  
Rare Earth ◽  
Spray Pyrolysis ◽  
Reaction Temperature ◽  
High Purity ◽  
Chloride Solution ◽  
Lanthanum Oxide ◽  
Lanthanum Chloride ◽  
Spray Pyrolysis Method ◽  
The Rare Earth

With lanthanum chloride solution as raw material, and use the hydrogen peroxide of clean and pollution-freeobtained from oxidation reaction as auxiliary reagent, and with the carrier gas together form spray pyrolysis to obtain lanthanum oxide. On the one hand, in the hydrogen peroxide system, the temperature of direct pyrolysis reaction of lanthanum chloride solution decreased obviously, The reaction temperature is decreased from 1280°C to 1000°C or less. That reduce the energy consumption and simplify the requirements of pyrolysis equipment technology. The production process does not use NH3.H2O and NaOH to precipitate. It does not produce the traditional process of NH4+, Na+ to pollute water. It can greatly reduce the damage to the environment, and can product with high yield, high purity of the rare earth oxide. This method not only applies to the pyrolysis of the rare earth chloride solution, also applies to metal chloride solution, such as FeCl3, AlCl3, NiCl2. It was shown that the reaction temperature has been effectively reduced, VLaCl3: VH2O2 with 1: 1.5 can get high purity of La2O3.

scholarly journals Reversible oxidant-induced increases in albumin transfer across cultured endothelium: alterations in cell shape and calcium homeostasis

Blood ◽  
1985 ◽  
Vol 65 (3) ◽  
pp. 605-614
Author(s):  
DM Shasby ◽  
SE Lind ◽  
SS Shasby ◽  
JC Goldsmith ◽  
GW Hunninghake
Keyword(s):  
Tissue Culture ◽  
Xanthine Oxidase ◽  
Calcium Homeostasis ◽  
Actin Filaments ◽  
Cell Shape ◽  
Culture Media ◽  
Extracellular Calcium ◽  
Lanthanum Chloride ◽  
Tissue Culture Media ◽  
Induced Changes

To determine whether reactive oxygen molecules could directly and reversibly increase the transfer of albumin across an endothelial barrier, we measured albumin transfer across monolayers of endothelium cultured on micropore filters before and after exposure to xanthine and xanthine oxidase. Xanthine and xanthine oxidase increased endothelial albumin transfer in a dose-dependent fashion. Parallel phase contrast and fluorescence microscopy demonstrated retraction of adjacent cells from one another and disruption of the actin filaments. The oxidant- induced increases in albumin transfer and changes in cell shape were reversed by removing xanthine oxidase and then incubating the monolayers for 3 1/2 hours in tissue culture media enriched with fetal bovine serum. However, incubation in tissue culture media without serum resulted in progressive injury and cell death. Hence, the brief exposure to oxidants initiated a progressive injury process that was reversed by incubation in serum. Because intracellular and extracellular calcium are important determinants of cell shape, and because some oxidized membrane lipids act as calcium ionophores, we asked whether oxidants altered endothelial calcium homeostasis. Xanthine-xanthine oxidase increased release of 45Ca++ from preloaded cells. The calcium antagonist lanthanum chloride prevented xanthine- xanthine oxidase increases in endothelial albumin transfer and prevented the changes in cell shape; chelation of extracellular calcium inhibited lysis of endothelium by xanthine-xanthine oxidase; and the calcium ionophore A23187 increased endothelial albumin transfer and mimicked the oxidant-induced changes in cell shape. Lanthanum chloride inhibited these effects of A23187. These data suggest that oxygen radicals can reversibly increase endothelial permeability to macromolecules, that this is associated with reversible changes in endothelial cell shape and actin filaments, and that the changes in cell shape are related to oxidant-induced changes in endothelial calcium homeostasis.

Synthesis of Lanthanum Oxide Using Lanthanum Chloride by Hydrogen-Oxygen Flame Pyrolysis Route

2014 ◽  
Vol 633-634 ◽  
pp. 499-503 ◽  
Author(s):  
Shou Feng Xue ◽  
Wen Yuan Wu ◽  
Xue Bian ◽  
Zhen Feng Wang ◽  
Zhi Ren Yang
Keyword(s):  
Rare Earth ◽  
Lanthanum Oxide ◽  
New Technology ◽  
Air Pollutant ◽  
Lanthanum Chloride ◽  
Raw Material ◽  
Rare Earth Compound ◽  
Roasting Process ◽  
Hydrogen Flame ◽  
Water Pollutant

Nowadays, people should pay more attention on the environment problems that had advent along with the development of rare earth metallurgy industry. A large number of water pollutant, air pollutant and solid pollutant were discharged in the process of synthesis of rare earth compound by precipitation and roasting process. In order to solve the industry pollution problems, a new technology route was developed for the preparation of lanthanum oxide using lanthanum chloride as raw material by oxy-hydrogen flame route. The experiment results showed that lanthanum chloride could directly convert to lanthanum oxide under high temperature by the combustion of mixture gas of hydrogen-oxygen that provided by oxy-hydrogen generator continuously. The phase composition of obtained product was characterized by XRD and the conversion rate of lanthanum chloride and the reaction mechanism were discussed.

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