Les Inscriptions à la Bibliothèque sont ouvertes en
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Les Réinscriptions se font à :
• La Bibliothèque Annexe pour les étudiants en
2ème Année CPST
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A partir de cette page vous pouvez :
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Détail de l'indexation
M006383
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Ouvrages de la bibliothèque en indexation M006383
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Titre : Milieux acides et extraction par solvant : application à la séparation uranium-molybdene par une amine Type de document : texte imprimé Auteurs : Omar Souilah, Auteur ; Benhassaïne, A., Directeur de thèse Editeur : Université des Sciences et de la Technologie Houari Boumedienne Année de publication : 1983 Importance : 129 f. Présentation : ill. Format : 27 cm. Note générale : Mémoire de Magister : Chimie des Matériaux : Alger, Université des Sciences et de la Technologie Houari Boumedienne : 1983
Bibliogr. [4] fLangues : Français (fre) Mots-clés : Milieux acides
Extraction par solvant
Uranium
Molybdène
Milieu nitrique
Mélange d'extractantsIndex. décimale : M006383 Résumé : La présence de molybdène dans la plus part des minerais uranifères (pour des raisons génétiques) constitue, après la lixiviation, l'handicap majeur du procédé de valorisation de l'uranium.
En effet, la lixiviation de l'uranium (quelle soit acide ou alcaline) entraine en général la solubilisation de tout ou d'une partie du molybdène dans le minerai.
Cette présence a été très tôt redoutée par les minéralurgistes, car elle causait des difficultés au niveau du traitement des solutions acides de lixiviation par résines échangeuses d'ions.
L'introduction de l'extraction par solvant a permis d'atténuer ces difficultés.
Cependant, nous avons constaté que le molybdène, très rapidement, se concentrait dans les solutions organiques lors du recyclage entrainant les mêmes conséquences que l'empoisonnement des résines.
On remarquera que l'utilisation d'un oxydant permet de minimiser cet "empoisonnement" sans toute fois l'éliminer.Milieux acides et extraction par solvant : application à la séparation uranium-molybdene par une amine [texte imprimé] / Omar Souilah, Auteur ; Benhassaïne, A., Directeur de thèse . - Alger : Université des Sciences et de la Technologie Houari Boumedienne, 1983 . - 129 f. : ill. ; 27 cm.
Mémoire de Magister : Chimie des Matériaux : Alger, Université des Sciences et de la Technologie Houari Boumedienne : 1983
Bibliogr. [4] f
Langues : Français (fre)
Mots-clés : Milieux acides
Extraction par solvant
Uranium
Molybdène
Milieu nitrique
Mélange d'extractantsIndex. décimale : M006383 Résumé : La présence de molybdène dans la plus part des minerais uranifères (pour des raisons génétiques) constitue, après la lixiviation, l'handicap majeur du procédé de valorisation de l'uranium.
En effet, la lixiviation de l'uranium (quelle soit acide ou alcaline) entraine en général la solubilisation de tout ou d'une partie du molybdène dans le minerai.
Cette présence a été très tôt redoutée par les minéralurgistes, car elle causait des difficultés au niveau du traitement des solutions acides de lixiviation par résines échangeuses d'ions.
L'introduction de l'extraction par solvant a permis d'atténuer ces difficultés.
Cependant, nous avons constaté que le molybdène, très rapidement, se concentrait dans les solutions organiques lors du recyclage entrainant les mêmes conséquences que l'empoisonnement des résines.
On remarquera que l'utilisation d'un oxydant permet de minimiser cet "empoisonnement" sans toute fois l'éliminer.Exemplaires
Code-barres Cote Support Localisation Section Disponibilité Spécialité Etat_Exemplaire M006383 M006383 Papier Bibliothèque centrale Mémoire de Magister Disponible Documents numériques
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