Isopiestic molalities for aqueous solutions of the alkali metal hydroxides at elevated temperatures

1998 ◽  
Vol 30 (3) ◽  
pp. 311-326 ◽  
Author(s):  
H.F. Holmes ◽  
R.E. Mesmer
Keyword(s):  
Alkali Metal ◽  
Aqueous Solutions ◽  
Elevated Temperatures ◽  
Metal Hydroxides ◽  
Alkali Metal Hydroxides

scholarly journals Corrosion of Hydrogen Storage Metal Alloy LaMm-Ni4.1Al0.3Mn0.4Co0.45 in the Aqueous Solutions of Alkali Metal Hydroxides

Materials ◽  
2018 ◽  
Vol 11 (12) ◽  
pp. 2423 ◽  
Author(s):  
Malgorzata Karwowska ◽  
Karol Fijalkowski ◽  
Andrzej Czerwiński
Keyword(s):  
Alkali Metal ◽  
Aqueous Solutions ◽  
Electrochemical Treatment ◽  
Metal Alloy ◽  
Mechanical Degradation ◽  
Nickel Metal ◽  
Metal Hydroxides ◽  
Alkali Metal Hydroxides ◽  
Electrochemical Capacity ◽  
Corrosion Intensity

Corrosion of pristine AB5-type metal alloy LaMm-Ni4.1Al0.3Mn0.4Co0.45 in the aqueous solutions of alkali metal hydroxides of diverse composition and concentration was tested. Correlation was observed between the alloy corrosion intensity in various hydroxide solutions, and its electrochemical capacity in these electrolytes. Mm(OH)3, CoO(OH), and nickel metal aggregates were detected among the products of selective oxidation of the alloy. High intensity corrosion of the alloy was observed in RbOH and CsOH solutions leading to formation of ternary oxides at the surface of the alloy. Presence of rubidium and cesium ions in the electrolyte were found to create an additional driving force for lanthanides (La and Ce) to leave the lattice of the alloy, thus, enhancing its corrosion. Corrosion, together with mechanical degradation, were found to be the main reasons of deactivation of LaMm-Ni4.1Al0.3Mn0.4Co0.45 alloy upon elongated electrochemical treatment.

scholarly journals RISM-Assisted Analysis of the Role of Alkali Metal Hydroxides in the Solvation of Cellulose in Alkali/urea Aqueous Solutions

2021 ◽  
Author(s):  
Eugene Huh ◽  
Ji-Hyun Yang ◽  
Chang-Ha Lee ◽  
Ik-sung Ahn ◽  
Byung Jin Mhin
Keyword(s):  
Alkali Metal ◽  
Aqueous Solutions ◽  
Electrostatic Interactions ◽  
Chemical Potential ◽  
Thermal Fluctuations ◽  
Quantitative Information ◽  
Metal Hydroxides ◽  
Cellulose Solvent ◽  
Alkali Metal Hydroxides

Abstract The three-dimensional reference interaction site model theory with the Kovalenko-Hirata closure (3D-RISM-KH) combined with the Kirkwood-Buff integral (KBI) was used to clarify the role of alkali metal hydroxides (MOHs) in cellulose solvation in alkali/urea aqueous solutions. The KBI and excess number of MOHs showed that their access and affinity to cellulose were both in the order LiOH > NaOH > KOH. The cavity and interaction volumes for cellulose indicate that the alkali metal ions closer in proximity to cellulose induce thermal fluctuations of cellulose molecules more easily and cause more electrostatic interactions and hydrogen bonding with cellulose. These calculation results support the hypothesis of cellulose charging up, which claims that cellulose-ion interactions cause cellulose solvation. The energy and chemical potential of cellulose solvation confirmed the affinity and interaction of MOHs with cellulose. Solvent reorganization, whose energy primarily determined the solvation energy, was found to be facilitated by the more proximal MOH when in the presence of urea. 3D-RISM-KH combined with KBI produced quantitative information regarding the distribution and attractive interaction of MOHs (especially LiOH) with cellulose, which clarified their role in cellulose solvation in alkali/urea aqueous solutions.

Structure of aqueous dioxane solutions of alkali metal hydroxides according to PMR data

1980 ◽  
Vol 21 (2) ◽  
pp. 162-167
Author(s):  
N. G. Dovbysh ◽  
Yu. A. Volokhov ◽  
V. B. Lebedev ◽  
V. M. Sizyakov ◽  
V. E. Mironov
Keyword(s):  
Alkali Metal ◽  
Aqueous Dioxane ◽  
Metal Hydroxides ◽  
Alkali Metal Hydroxides

The dissolution of beryllia in molten alkali metal hydroxides

1965 ◽  
Vol 18 (11) ◽  
pp. 1719 ◽  
Author(s):  
ME Shying ◽  
RB Temple
Keyword(s):  
Alkali Metal ◽  
Water Vapour ◽  
Beryllium Oxide ◽  
Major Product ◽  
Kcal Mole ◽  
Metal Hydroxides ◽  
Temperature Range ◽  
Alkali Metal Hydroxides ◽  
Reversible Formation

Beryllium oxide shows a limited reversible solubility in molten alkali-metal hydroxides only when dissolved water vapour is present. The reaction taking place has been studied in detail. The results obtained are consistent with the reversible formation of the beryllate ion [Be(OH)4]2- as the major product, according to the overall equation BeO(solid) + H2O(dissolved) + 2OH- ↔ [Be(OH)4]2-(dissolved) The enthalpy of the reaction has been calculated to be 4.8 kcal/mole over the temperature range 240-510�.

Application of Alkali Metal Hydroxides for the Preparation of gem‐Chlorophenylcyclopropanes

2006 ◽  
Vol 36 (23) ◽  
pp. 3571-3579 ◽  
Author(s):  
Andrzej Jończyk ◽  
Hanna Karwowska ◽  
Jolanta Furman
Keyword(s):  
Alkali Metal ◽  
Metal Hydroxides ◽  
Alkali Metal Hydroxides
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