ChemInform Abstract: Voltammetric Study of Polycrystalline Rhodium in Alkaline Solutions at Different Temperatures.

ChemInform ◽  
1989 ◽  
Vol 20 (24) ◽  
Author(s):  
Z. CATALDI ◽  
R. O. LEZNA ◽  
M. C. GIORDANO ◽  
A. J. ARVIA
Keyword(s):  
Alkaline Solutions ◽  
Voltammetric Study ◽  
Different Temperatures

Correlation between global thermodynamic functions and experimental data in multicomponent heterogeneous systems

2016 ◽  
Vol 94 (2) ◽  
pp. 113-119 ◽  
Author(s):  
Igor Povar ◽  
Oxana Spinu
Keyword(s):  
Experimental Data ◽  
Thermodynamic Functions ◽  
Solid Phase ◽  
Heterogeneous Systems ◽  
Thermodynamic Characteristics ◽  
Alkaline Solutions ◽  
Precipitation Process ◽  
Mutual Transformation ◽  
Homogeneous Solutions ◽  
Different Temperatures

The correlation between global thermodynamic functions and such experimental data, which quantitatively characterize the precipitation–dissolution processes of sparingly soluble compounds, as the degree of precipitation and residual concentrations of the solid-phase components in saturated solutions under real conditions, taking into account the complex formation reactions, has been deducted. The paper intends also to introduce widely formal thermodynamic methods for forecasting the conditions of mutual transformation of solid phases through chemical synthesis by precipitation methods, optimization of coprecipitation methods, fractional precipitation from homogeneous solutions, and separation and analysis of chemical compounds. Within the method of residual concentrations, the thermodynamic parameters of the process of precipitating cadmium ions with potassium decanoate from acid and alkaline solutions for different temperatures were investigated. On the basis of the experimentally determined degree of precipitation and its dependence on temperature, the temperature coefficients and overall thermodynamic characteristics of the precipitation process ([Formula: see text], [Formula: see text], and [Formula: see text]) were determined. The optimum conditions of the investigated process of precipitation have been established.

Biochar prepared from castor oil cake at different temperatures: A voltammetric study applied for Pb2+, Cd2+ and Cu2+ ions preconcentration

2016 ◽  
Vol 318 ◽  
pp. 526-532 ◽  
Author(s):  
Cristiane Kalinke ◽  
Antonio Sálvio Mangrich ◽  
Luiz H. Marcolino-Junior ◽  
Márcio F. Bergamini
Keyword(s):  
Castor Oil ◽  
Voltammetric Study ◽  
Different Temperatures

scholarly journals Corrosion Characteristics Of the Rare Earth and Yttrium Metals

CORROSION ◽  
1964 ◽  
Vol 20 (5) ◽  
pp. 145t-149t ◽  
Author(s):  
LINDA LEE ◽  
N. D. GREENE
Keyword(s):  
Weight Loss ◽  
Rare Earth ◽  
Weight Gain ◽  
Aqueous Solutions ◽  
Physical Properties ◽  
Corrosion Behavior ◽  
Rare Earths ◽  
Rare Earth Metals ◽  
Alkaline Solutions ◽  
Different Temperatures

Abstract The corrosion of rare earth metals in air, water, and aqueous solutions at different temperatures has been measured by conventional weight loss and weight gain tests. The metals oxidize slowly in air, corrode slowly in water and alkaline solutions, and are readily soluble in most acids. Correlations of corrosion behavior with the electronic and physical properties of the rare earths are discussed.

scholarly journals 2-Methylimidazole Copper Iminodiacetates for the Adsorption of Oxygen and Catalytic Oxidation of Cyclohexane

Molecules ◽  
2020 ◽  
Vol 25 (6) ◽  
pp. 1286
Author(s):  
Xi Chen ◽  
Dong-Li An ◽  
Xin-Qi Zhan ◽  
Zhao-Hui Zhou
Keyword(s):  
Thermal Analyses ◽  
Iminodiacetic Acid ◽  
Mixed Ligand ◽  
Alkaline Solutions ◽  
The Novel ◽  
Total Conversion ◽  
Catalytic Activities ◽  
Different Temperatures ◽  
Xrd Patterns ◽  
Different Gases

The mixed-ligand copper(II) iminodiacetates [Cu(ida)(2-mim)(H2O)2]·H2O (1), [Cu(ida)(2-mim)2]·2H2O (2), [Cu(ida)(2-mim)(H2O)]n·4.5nH2O (3), and [Cu2(ida)2(2-mim)2]n·nH2O (4) (H2ida = iminodiacetic acid, 2-mim = 2-methylimidazole) were obtained from neutral or alkaline solutions at different temperatures. The novel complex 4 contains very small holes with diameters of 2.9 Å, which can adsorb O2 selectively and reversibly between 1.89 to 29.90 bars, compared with the different gases of N2, H2, CO2, and CH4. This complex is stable up to 150 °C based on thermal analyses and XRD patterns. The four complexes show catalytic activities that facilitate the conversion of cyclohexane to cyclohexanol and cyclohexanone with hydrogen peroxide in a solution. The total conversion is 31% for 4.

Complex Carbon-Mineral Sorbents from Common Clay

2005 ◽  
Vol 498-499 ◽  
pp. 734-739
Author(s):  
Shirley Cosin ◽  
Carolina A. Pinto ◽  
P. Souza Santos ◽  
Francisco Rolando Valenzuela-Díaz
Keyword(s):  
Methylene Blue ◽  
Corrosion Test ◽  
Room Temperature ◽  
Carbon Materials ◽  
Alkaline Solutions ◽  
Ceramic Filters ◽  
Mass Losses ◽  
Different Temperatures ◽  
Complex Carbon ◽  
Corrosion Strength

Carbon/mineral complexes are materials with surfaces covered partially or totally by carbon materials contains. They have high industrial potential uses as material adsorbents and ceramic filters. The objective of this work is to evaluate the corrosion strength in acid and alkaline solutions, and the adsorption capacity of methylene blue of some materials prepared in the LMPSol. The compositions were prepared with an industrial common clay named “taguá” and organic and inorganic additives from industrial residues up to 50%. The corrosion test was performed in water at 60°C and in aqueous solutions of HCl and NaOH at room temperature, with mass losses measured after 15 days. The samples were pressed manually and heated at different temperatures: 110°C, 350°C and 500°C. The performed tests were transverse flexural strength, porosity and water absorption.

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