Jean-Jacques Counioux's research while affiliated with Claude Bernard University Lyon 1 and other places
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Publications (14)
A systematic study of the solid-liquid equilibria of the H2O-Co(NO3)2-Ni(NO3)2 ternary system enabled to define the liquidus and the solidus curves of the isotherms at 287.15 K and 313.5 K. Two widespread solid solutions, Co(1-σ)Niσ(NO3)2.6H2O and Ni(1-ω)Coω(NO3)2.6H2O, were observed. They were formed by the substitution of Co²⁺ cations by Ni²⁺ cat...
The isothermal solubility curves of the H2O–Co(NO3)2–Ni(NO3)2 ternary system were studied at 273.15 and 303.15 K, using a synthetic method based on conductivity measurements. The analysis of the equilibrium phases’ composition was conducted by UV–visible spectroscopy. The solid phases were first characterized by powder X-ray diffraction, which show...
Demixing phenomena in liquid ternary systems are widely used in chemical engineering processes. When a critical point is observed, the composition of this invariant point of major interest is experimentally difficult to determine. A simple calculation method for the critical point is proposed using the experimental tie-lines. The computing treatmen...
The hydrates of cobalt and nickel nitrates are highly relevant as precursors for the preparation of mixed ceramics. In order to verify the numerous bibliographical data, systematic solubility measurements in aqueous medium under atmospheric pressure and a critical evaluation have been undertaken. By taking solvation phenomena into account, it has p...
It is very rare that a one-step process of extraction leads to the pure compound with a high degree of purity specified by
an industrial application. The various stages of a synthesis process and possible secondary reactions may lead to the synthesis
of more or less complex and highly diluted solutions. In this work, the rationale and strategy for...
This paper is the fourth and final volume in the halate solubility series. The solubility data for halates of transition metals, lanthanides, actinides, ammonium, and metallic elements of the main groups 12-14 are reviewed. Where appropriate, binary, ternary, and multicomponent systems are critically evaluated. Most of the solubility results were o...
Les equilibres solide-liquide du systeme ternaire H 2 O - Al(NO 3 ) 3 - Zn(NO 3 ) 2 sont etudies par une methode synthetique basee sur la mesure de la conductivite. Six isothermes sont etablies et les phases trouvees sont: *a -25 et -15°C : glace, Zn(NO 3 ) 2 . 8H 2 O et Al(NO 3 ) 3 . 9H 2 O *a -5°C : glace, Zn(NO 3 ) 2 . 6H 2 O et Al(NO 3 ) 3 . 9H...
A study of the solid-liquid equilibria in the ternary system H2ONH4NO3Al(NO3)3 has been undertaken in order to find an invariant transformation at low temperature.Five isothermal sections have been established under atmospheric pressure at −25, −20, −18.2, −10 and 0°C. The solid phases observed at these temperatures are: at −25 and −20°C, ice, NH...
]Preliminary treatments of barytine ores led to an aqueous solution containing sodium, calcium, strontium and barium chlorides. In order to define a rational extraction process for barium and strontium chlorides, solid-liquid equilibria were studied in the system H2ONaClCaCl2SrCl2BaCl2. First, one isoplethic section of the equilibrium diagram was s...
In order to study solid-liquid equilibria in multicomponent electrolyte systems, an automated conductimetric analysis device has been built and perfected. p]The principles of design and working are based on conductivity measurements in polyphased mixtures, without removing samples, either in the stirred mixture or in the decanted clear solution.Und...
The enthalpies of fusion of the MPO3 (M = Li, Na, K, Rb, Cs, Ag, Tl) polyphosphates were determined by calorimetry.The MPO3-LaP3O9 binary systems were investigated for the first time by DTA. The study shows in all cases the existence of one or both of the two intermediate compounds: MLa(PO3)4 and M2La(PO3)5.The solid-liquid equilibria of the MPO3-L...
Citations
... The wastewater used in this work are model solutions loaded with nickel ions (Ni 2+ ) which were obtained by solubilizing in distilled water the hydrated nickel nitrates, in powder, of chemical formula Ni (NO 3 ) 2 ; 6H 2 O and molar mass 290.81 g/mole (CAS: 13478-00-7) [16], the appearance of which is shown in Fig. 2 and which was supplied by Servichime of Kenitra-Morocco, in order to obtain 100 ppm concentration stock solutions. After having these effluents, we prepared, by successive dilutions, 5 solutions containing increasing concentrations respectively 2 ppm, 4 ppm, 6 ppm, 8 ppm and 10 ppm, and this to have a calibration curve according to the Beer-Lambert law below [17] using flame atomic absorption spectrometry (analytical mark Jena, model Navaa 350) menu within the analysis and incubation center and expertise of the Faculty of Sciences-Kenitra: ...
... First, a composite UV photopolymerizable resin was prepared by mixing the aqueous solution of metal precursor salts in stoichiometric amounts, photoinitiator, and polymer matrix; as described in the Materials and methods section. Nitrate precursor salts were selected as the metal precursors among many different salts due to their superior solubility in water 27,28 . The higher solubility of salts also enabled the preparation of comparatively concentrated metal solutions (3 mol L −1 ). ...
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... Au cours d'une technique dynamique, on contrôle une grandeur pendant que le système est soumis à la variation d'une autre. Parmi ces techniques, la conductimétrie mesure la variation de la conductance au cours d'ajout de solvant (modification de la composition) (Berthet et Counioux, 1992). La calorimétrie différentielle à balayage DSC contrôle le flux de chaleur avec la variation de température de l'échantillon pour une composition donnée. ...
... Phase diagrams play important roles in interpreting the variation of properties with composition. The systematic investigation of new long chain polyphosphates containing monovalent and trivalent cations, appearing in the M I PO 3 -M III (PO 3 ) 3 systems (M I : monovalent cation, M III : rare-earth trivalent cation, Bi and Y) [6][7][8], and especially the KPO 3 -M III (PO 3 ) 3 systems (M III = La [9,10], Ce [11,12], Sm [13], Er [14], Bi [15]) as a possible basis for producing inorganic materials is promising. In this work we report, for the first time, the results obtained for the KPO 3 -Y(PO 3 ) 3 system. ...
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... Iodide forms extremely strong complexes to some soft metals, including silver and mercury (Gammons and Yu, 1997;Pruszyński et al., 2006). Iodate can also form complexes with a range of metal ions in aqueous systems (e.g., Miyamoto et al., 2008). Iodine forms relatively strong chemical bonds with organic matter, where iodine covalently bonds with carbon in the molecular structure of natural organic matter compounds (Walters and Winchester 1971;Schlegel et al., 2006). ...
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