Lithium-sodium separation by ion-exchange. Particular study of a pulsed column
Creators
- 1. Commissariat a l'Energie Atomique, Grenoble (France). Centre d'Etudes Nucleaires
Description
A study is made of the operational conditions and constraints in the case of a moving-bed ion-exchange column subjected to pulses. The example chosen to illustrate its application concerns the lithium-sodium separation in a hydroxide medium (LiOH, NaOH). In the first part, the physico-chemical characteristics of the exchange and the kinetic characteristics of the exchange-reaction are considered. In the second part, the operation of the pulsed column is studied. Using the results obtained in the first part, the conditions required for study state operation are determined. When this is obtained, it is possible to calculate the height equivalent of the theoretical plate (HETP) of the installation. A study is also made of 'sliding', a phenomenon peculiar to pulsed columns. The results obtained show that it is possible, using laboratory tests, to determine the characteristics and the operational condition of a moving-bed ion-exchange column. (author)
Abstract (French)
On se propose d'etudier les conditions et les servitudes de fonctionnement d'une colonne d'echangeurs d'ions a lit mobile, fonctionnant par 'impulsions'. L'exemple d'application choisi est la separation lithium-sodium en milieu hydroxyde (LiOH, NaOH). Dans une premiere partie, on etudie successivement les caracteristiques physico-chimiques de l'echange envisage et les caracteristiques cinetiques de la reaction d'echange mise en oeuvre. Dans une seconde partie on etudie le fonctionnement de la colonne a impulsions. A partir des resultats acquis dans la premiere partie, on determine les conditions necessaires a l'obtention d'un regime permanent. Lorsque celui-ci est atteint en colonne, les performances obtenues permettent de calculer la hauteur equivalente a un plateau theorique (HEPT) de l'installation. On etudie par ailleurs l'influence du 'glissement', phenomene inherent au fonctionnement de la colonne a impulsions. L'ensemble des resultats acquis montre qu'il est possible, a partir d'essais effectues en laboratoire, de determiner les caracteristiques et les conditions de fonctionnement d'une colonne d'echangeurs d'ions a lit mobile. (auteur)Files
51119901.pdf
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Additional details
Additional titles
- Original title (French)
- La separation lithium-sodium par echange d'ions. Etude particuliere d'une colonne a impulsions
Publishing Information
- Imprint Pagination
- 137 p.
- Report number
- CEA-R--3111
INIS
- Country of Publication
- France
- Country of Input or Organization
- France
- INIS RN
- 51119901
- Subject category
- S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
- Resource subtype / Literary indicator
- Thesis
- Descriptors DEI
- CHEMICAL REACTION KINETICS; HYDROXIDES; ION EXCHANGE; LITHIUM; RESINS; SEPARATION PROCESSES; SODIUM; THERMODYNAMIC PROPERTIES
- Descriptors DEC
- ALKALI METALS; ELEMENTS; HYDROGEN COMPOUNDS; KINETICS; METALS; ORGANIC COMPOUNDS; ORGANIC POLYMERS; OXYGEN COMPOUNDS; PETROCHEMICALS; PETROLEUM PRODUCTS; PHYSICAL PROPERTIES; POLYMERS; REACTION KINETICS
Optional Information
- Notes
- 39 refs.; Available from the INIS Liaison Officer for France, see the INIS website for current contact and E-mail addresses; This record replaces 36069312