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Thermodynamic Calculation of the Distribution Coefficient Between the Liquid and Solid Phases of an Element in Dilute Solution in a Metal: Application to the Purification of Beryllium; Calcul Thermodynamique du Coefficient de Distribution Entre Phases Liquide et Solide d'un Element en Presence d'Autres Constituants en Solution Diluee dans un Metal: Application a la Purification du Beryllium

Conference:

Abstract

The authors calculate the distribution coefficient {Gamma}{sub i} between the liquid and solid phases of an element i in the presence of other elements j in a solvent M ({Gamma}{sub i} = x'{sub i}/x{sub i}, where x'{sub i} and x{sub i} are the atomic fractions of i in the solid and liquid phases respectively) from the thermodynamic properties of binary systems of the type (i, M), (j, M) and (i, j). They show that the interaction of all the elements present may, under certain conditions, strongly affect the value of the coefficient {Gamma}{sub i}. This effect is pronounced if the following condition is fulfilled: {gamma}{sup {infinity}}{sub i(M)}, {gamma}{sup {infinity}}{sub j(M)} > {gamma}{sup {infinity}}{sub ij} where {gamma}{sup {infinity}}{sub i(M)}, {gamma}{sup {infinity}}{sub j(M)} and {gamma}{sup {infinity}}{sub ij} are limiting activity coefficients of the constituents i and j in the (i, M) (j, M) and (i, j) liquid state systems. It is a simple matter to deduce from this condition an application to the purification of metals by the zone-melting method; the condition enables one to choose an element j which is added deliberately to a metal in order to facilitate the elimination-of an element i (subsequent elimination of the element j being  More>>
Authors:
Desre, P.; [1]  Schaub, B.; [2]  Bonnier, I. E. [3] 
  1. Ecole Nationale Superieure d'Electrochimie et d'Electrometallurgie (France)
  2. Centre d'Etudes Nucleaires de Grenoble (France)
  3. Ecole Nationale Superieure d'Electrochimie et d'Electrometallurgie, Grenoble (France)
Publication Date:
Jan 15, 1966
Product Type:
Conference
Report Number:
IAEA-SM-66/56
Resource Relation:
Conference: Symposium on Thermodynamics with Emphasis on Nuclear Materials and Atomic Transport in Solids, Vienna (Austria), 22-27 Jul 1965; Other Information: 3 refs.; Related Information: In: Thermodynamics. Vol. I. Proceedings of the Symposium on Thermodynamics with Emphasis on Nuclear Materials and Atomic Transport in Solids| 539 p.
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 42 ENGINEERING; ALUMINIUM; BERYLLIUM; IRON; LIQUIDS; PURIFICATION; REACTION KINETICS; SOLIDS; SOLUTIONS; SOLVENTS; THERMODYNAMIC ACTIVITY; THERMODYNAMIC PROPERTIES; ZONE MELTING
OSTI ID:
22117346
Research Organizations:
International Atomic Energy Agency, Vienna (Austria); International Union of Pure and Applied Chemistry, Commission on Thermodynamics and Thermochemistry, Research Triangle Park, NC (United States)
Country of Origin:
IAEA
Language:
French
Other Identifying Numbers:
Other: ISSN 0074-1884; TRN: XA13M2392073967
Submitting Site:
INIS
Size:
page(s) 493-500
Announcement Date:
Aug 01, 2013

Conference:

Citation Formats

Desre, P., Schaub, B., and Bonnier, I. E. Thermodynamic Calculation of the Distribution Coefficient Between the Liquid and Solid Phases of an Element in Dilute Solution in a Metal: Application to the Purification of Beryllium; Calcul Thermodynamique du Coefficient de Distribution Entre Phases Liquide et Solide d'un Element en Presence d'Autres Constituants en Solution Diluee dans un Metal: Application a la Purification du Beryllium. IAEA: N. p., 1966. Web.
Desre, P., Schaub, B., & Bonnier, I. E. Thermodynamic Calculation of the Distribution Coefficient Between the Liquid and Solid Phases of an Element in Dilute Solution in a Metal: Application to the Purification of Beryllium; Calcul Thermodynamique du Coefficient de Distribution Entre Phases Liquide et Solide d'un Element en Presence d'Autres Constituants en Solution Diluee dans un Metal: Application a la Purification du Beryllium. IAEA.
Desre, P., Schaub, B., and Bonnier, I. E. 1966. "Thermodynamic Calculation of the Distribution Coefficient Between the Liquid and Solid Phases of an Element in Dilute Solution in a Metal: Application to the Purification of Beryllium; Calcul Thermodynamique du Coefficient de Distribution Entre Phases Liquide et Solide d'un Element en Presence d'Autres Constituants en Solution Diluee dans un Metal: Application a la Purification du Beryllium." IAEA.
@misc{etde_22117346,
title = {Thermodynamic Calculation of the Distribution Coefficient Between the Liquid and Solid Phases of an Element in Dilute Solution in a Metal: Application to the Purification of Beryllium; Calcul Thermodynamique du Coefficient de Distribution Entre Phases Liquide et Solide d'un Element en Presence d'Autres Constituants en Solution Diluee dans un Metal: Application a la Purification du Beryllium}
author = {Desre, P., Schaub, B., and Bonnier, I. E.}
abstractNote = {The authors calculate the distribution coefficient {Gamma}{sub i} between the liquid and solid phases of an element i in the presence of other elements j in a solvent M ({Gamma}{sub i} = x'{sub i}/x{sub i}, where x'{sub i} and x{sub i} are the atomic fractions of i in the solid and liquid phases respectively) from the thermodynamic properties of binary systems of the type (i, M), (j, M) and (i, j). They show that the interaction of all the elements present may, under certain conditions, strongly affect the value of the coefficient {Gamma}{sub i}. This effect is pronounced if the following condition is fulfilled: {gamma}{sup {infinity}}{sub i(M)}, {gamma}{sup {infinity}}{sub j(M)} > {gamma}{sup {infinity}}{sub ij} where {gamma}{sup {infinity}}{sub i(M)}, {gamma}{sup {infinity}}{sub j(M)} and {gamma}{sup {infinity}}{sub ij} are limiting activity coefficients of the constituents i and j in the (i, M) (j, M) and (i, j) liquid state systems. It is a simple matter to deduce from this condition an application to the purification of metals by the zone-melting method; the condition enables one to choose an element j which is added deliberately to a metal in order to facilitate the elimination-of an element i (subsequent elimination of the element j being also, of course, a simple matter). For example, the authors were able to confirm that the addition of aluminium to beryllium enables one to improve the elimination of iron during the purification of the beryllium by the zone-melting technique, the aluminium acting as a carrier. (author) [French] Les auteurs calculent le coefficient de distribution Greek-Capital-Letter-Gamma {sub i} entre phases liquide et solide d'un element i en presence d'autres elements j dans un solvant M ( Greek-Capital-Letter-Gamma {sub i} = x'{sub i}/x{sub i}, x'{sub i} et x{sub i} representant respectivement les fractions atomiques de i dans les phases solide et liquide), a partir des proprietes thermodynamiques des systemes binaires de type: (i, M); (j, M); (i, j). On montre que les interactions de tous les elements en presence peuvent dans certaines conditions influer fortement sur la valeur du coefficient Greek-Capital-Letter-Gamma {sub i} Cette influence sera marquee si la condition suivante est verifiee: {gamma}{sup {infinity}}{sub i(M)}, {gamma}{sup {infinity}}{sub j(M)} > {gamma}{sup {infinity}}{sub ij} {gamma}{sup {infinity}}{sub i(M)}, {gamma}{sup {infinity}}{sub j(M)}, {gamma}{sup {infinity}}{sub ij} coefficients d'activite limite des constituants i et j dans les systemes a l'etat liquide: (i, M); (j, M) et (i, j). Il est aise d'en deduire une application a la purification des metaux, notamment par la methode dite de la zone fondue. En effet la condition precedente permet de choisir un element j a ajouter volontairement a un metal pour faciliter l'elimination d'un element i, etant bien entendu qu'il est facile ensuite d'eliminer l'element j. Ainsi les auteurs ont verifie que l'addition d'aluminium au beryllium permettait d'ameliorer l'elimination du fer au cours de la purification du beryllium par la technique de la zone fondue, l'aluminium jouant alors le role d'entraineur. (author) [Spanish] Los autores calculan el coeficiente de distribucion Greek-Capital-Letter-Gamma {sub i} entre las fases liquida y solida de un elemento i en presencia de otros elementos j en un disolvente M ( Greek-Capital-Letter-Gamma {sub i} = x'{sub i}/x{sub i}, donde x'{sub i} y x{sub i} representan, respectivamente, las fracciones atomicas de i en las fases solida y liquida), partiendo de las propiedades termodinamicas de sistemas binarios del tipo(i, M), (j, M) y (i, j). Los autores demuestran que las interacciones de todos los elementos presentes pueden, en determinadas condiciones, influir considerablemente sobre el valor del coeficiente Greek-Capital-Letter-Gamma {sub i}. Esta influencia sera notable si se satisface la condicion siguiente: {gamma}{sup {infinity}}{sub i(M)}, {gamma}{sup {infinity}}{sub j(M)} > {gamma}{sup {infinity}}{sub ij} siendo {gamma}{sup {infinity}}{sub i(M)}, {gamma}{sup {infinity}}{sub j(M)} y {gamma}{sup {infinity}}{sub ij} los coeficientes de actividad limite de los elementos i y j en los sistemas liquidos (i, M), (j, M) y (i, j). Resulta facil deducir una aplicacion de cuanto antecede a la purificacion de los metales, en particular mediante el metodo llamado de la zona fundida. En efecto, la condicion expuesta permite elegir un elemento j a fin de anadirlo deliberadamente a un metal para facilitar la eliminacion de un elemento i, quedando entendido que resulta facil eliminar subsiguientemente ese elemento j. De esta forma, los autores han comprobado que la adicion de aluminio al berilio facilita la eliminacion del hierro en el proceso de purificacion-del berilio por la tecnica de la zona fundida; en ese caso, el aluminio desempena el papel de portador. (author) [Russian] Avtory rasschityvajut kojefficient raspredelenija Greek-Capital-Letter-Gamma {sub i} mezhdu zhidkoj i tverdoj fazami jelementa i pri nalichii drugih jelementov j v rastvoritele M ( Greek-Capital-Letter-Gamma {sub i} = x'{sub i}/x{sub i}, gDe x'{sub i} and x{sub i} javljajutsja sootvetstvenno atomnymi chastjami i v zhidkoj i tverdoj fazah) na osnove termodinamicheskih svojstv binarnyh sistem tipa: (i ,M); (j, M); (i, j). Avtory pokazyvajut, chto vzaimodejstvija vseh prisutstvujushhih jelementov mogut pri opredelennyh uslovijah okazyvat' sil'noe vlijanie na velichinu kojefficienta Ti . Jeto vlijanie stanet zametnym pri proverke sledujushhego uslovija: {gamma}{sup {infinity}}{sub i(M)}, {gamma}{sup {infinity}}{sub j(M)} > {gamma}{sup {infinity}}{sub ij} gde {gamma}{sup {infinity}}{sub i(M)}, {gamma}{sup {infinity}}{sub j(M)}, {gamma}{sup {infinity}}{sub ij} javljajutsja kojefficientami predel'noj aktivnosti sostavnyh i i j v sistemah, nahodjashhihsja v zhidkom sostojanii: (i, M); (j, M) i (i, j). Iz jetogo legko sdelat' vyvod o primenenii k ochistke metallov, v chastnosti metodom tak nazyvaemoj rasplavlennoj zony. V dejstvitel'nosti, predydushhee uslovie pozvoljaet vybrat' jelement j dlja dobavlenija v proizvol'nom porjadke k metallu s cel'ju oblegchit' udalenie jelementa i, razumeetsja pri uslovii, chto zatem sleduet udalit' jelement j . Takim obrazom, avtory proverkoj ustanovili, chto dobavlenie aljuminija k berilliju pozvolilo uluchshit' udalenie zheleza v processe ochistki berillija metodom rasplavlennoj zony. Pri jetom aljuminij igral rol' nositelja. (author)}
place = {IAEA}
year = {1966}
month = {Jan}
}