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Cote, G.; Chagnes, A.; Courtaud, B.; THIRY, J.
Proceedings of the 23. International Symposium on Physico-Chemical Methods of Separation - Ars Separatoria 20082008
Proceedings of the 23. International Symposium on Physico-Chemical Methods of Separation - Ars Separatoria 20082008
AbstractAbstract
No abstract available
Primary Subject
Source
Koter, S.; Koter, I. (eds.); Nicolaus Copernicus University in Torun (Poland); Wroclaw University of Technology, Wroclaw (Poland); University of Technology and Life Sciences, Bydgoszcz (Poland); 384 p; ISBN 978-83-231-2208-1;
; 2008; p. 15-16; 23. International Symposium on Physico-Chemical Methods of the Mixtures Separation - Ars Separatoria 2008; Torun (Poland); 6-9 Jul 2008; Available from Nicolaus Copernicus University in Torun; Also available from Wroclaw University of Technology; Also available from University of Technology and Life Sciences; Also available at http://www.arsseparatoria.chem.uni.torun.pl/2008Symp/contents08.html; 6 refs.

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Troncoso Cortez, Ulises Ivan
Universidad de Chile. Facultad de Ciencias Fisicas y Matematicas. Departamento de Ingenieria de Minas (Chile)2014
Universidad de Chile. Facultad de Ciencias Fisicas y Matematicas. Departamento de Ingenieria de Minas (Chile)2014
AbstractAbstract
[en] Starting in 2012 an in crease in the annual throughput from 1.4 to 1.8 millions tons has been projected by the Society of Mine Miraso. This increase is the result of the equipments upgrade works, which have been carried out in 2011 at the crushing plant as well as the heap stacking system. The main changes were associated to the belt conveyors and to the transfer chutes improvements of these two areas. However, the equipments and facilities associated to the agglomeration, leaching and solvent extraction operations were not modified. The objective of this work is to evaluate this new industrial scenario by identifying possible bottlenecks that may slow down the global production process. A study of the treatment capabilities of each main unit is conducted to accomplish this purpose. The evaluation was done in two stages. First of all, an update of the design criteria and the mass balance were performed to establish the Base Case. After that, two alternatives were included to evaluate the impact of the ore treatment increase, in one and two leaching cycles. Aside of the ore throughput increase, the most important changes with impact in the equipments capacities are the utilization reduction of the stacking system (from 80 to 71 %), the increase of the acid application into the agglomerator drum (from 16 to 30 kg/t) and the irrigation rate reduction at the leaching area (from 4.5 to 3.0 1/h/m2). At the agglomeration, the final conclusion is the equipments have the capacity to receive the production increase. However, there are some deviations that need to be corrected, such as the capacity and design of the water and acid injection pipes inside the drum. At the heap leaching area, the irrigation pump system is near the limit of the required capacity (280 m3 /h), so the leaching in two stages could be a solution. Nevertheless, this alternative is recommended as a punctual operational response, in case of an eventual increase in the suspended solids and consequent organic entrainments. Finally, it is recommended to increase the amine concentration at the solvent extraction plant, from 8 to 10%, and thus keep the plant efficiency transfer without to increase the organic flow rate
Original Title
Evaluacion de la capacidad de tratamiento de las unidades de aglomeracion, lixiviacion y extraccion con solventes por expansion de la produccion de una planta hidrometalurgica de uranio
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2014; 1124 p; Available from Library of CCHEN; 25 refs., 20 figs., 30 tabs; Thesis (Ingeniero Civil en Minas)
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AbstractAbstract
[en] The present article is based on a bibliographical analysis of the main applications of the supercritical fluid in various fields, as: extraction from solid matrices, division of liquid charges, chromatography HPLC with supercritical eluent, chemical and biochemical reactions in supercritical solvents etc
[it]
Il presente articolo e' basato soprattutto sull'analisi bibliografica, in particolare quella brevettuale, delle principali applicazioni dei fluidi supercritici in diversi campi, tra cui estrazione da matrici solide, frazionamento di cariche liquide, cromatografia HPLC con eluenti supercritici, reazioni chimiche e biochimiche in solventi supercritici eccOriginal Title
Tecnologia con fluidi supercritici. Parte 2. Applicazioni
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Cote, G.; Chagnes, A.
Proceedings of the 22. International Symposium on Physico-Chemical Methods of Separation - Ars Separatoria 20072007
Proceedings of the 22. International Symposium on Physico-Chemical Methods of Separation - Ars Separatoria 20072007
AbstractAbstract
No abstract available
Primary Subject
Source
Trochimczuk, A.W.; Walkowiak, W. (eds.); Wroclaw University of Technology, Wroclaw (Poland); Nicolaus Copernicus University, Torun (Poland); 217 p; ISBN 978-83-7493-317-9;
; 2007; p. 14-15; 22. International Symposium on Physico-Chemical Methods of Separation - Ars Separatoria 2007; Szklarska Poreba (Poland); 10-14 Jun 2007; Also available from Wroclaw University of Technology or Nicolaus Copernicus University

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Fan, C.Y.; Krishnamurthy, S.; Chen, C.T.
Analysis of soils contaminated with petroleum constituents1994
Analysis of soils contaminated with petroleum constituents1994
AbstractAbstract
[en] The clean up of soils contaminated with petroleum products is associated with several challenges, especially of analytical methodologies and data interpretation. Petroleum products comprise a vast continuum of hydrocarbons from short chain aliphatic and simple aromatic hydrocarbons in gasoline to kerosene, diesel, and heavy oils and to lubricating oils or vaseline, each gradation with increasing carbon chains and complexity. Gasoline alone may contain over twelve hundred compounds. Properties of these vary and this will be of analytical concern. Treatment technology and site remediation progress will lean heavily on analytical techniques that are accurate, reproducible and of real time value. This paper examines the various analytical techniques available along with their special features. Some new methods currently under development are also discussed. These include: (1) High Resolution Chromatograph method which can reveal the detail composition of the contaminants; (2) Supercritical Fluid Extraction which can save time for the analysis; and (3) Fingerprinting which can be used to determine the responsible party for the spill. In addition, the interference due to weathering is also examined
Primary Subject
Source
O'Shay, T.A. (ed.) (Gordon and Lawton Inc., Austin, TX (United States)); Hoddinott, K. (ed.) (Army Environmental Hygiene Agency, Aberdeen Proving Ground, MD (United States)); 116 p; ISBN 0-8031-1898-8;
; 1994; p. 61-74; American Society for Testing and Materials; Philadelphia, PA (United States); Symposium on analysis of soils contaminated with petroleum constituents; Atlanta, GA (United States); 24 Jun 1993; American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103 (United States)

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Khemangkorn, Voravit
Institut National Polytechnique de Toulouse, Institut du Genie Chimique (France); Universite Paul Sabatier de Toulouse (France)1976
Institut National Polytechnique de Toulouse, Institut du Genie Chimique (France); Universite Paul Sabatier de Toulouse (France)1976
AbstractAbstract
[en] This research thesis aims at a better knowledge of some aspects of the operation of pulsed columns with perforated plates, through a systematic study of the exchange area and of the transfer coefficient. Thus, the author studied the column efficiency and the retention of the dispersed phase. The experimental method of concentration profile has been used. The Miyauchi model has been used to represent the column operation. The number of transfer units and the Peclet number have been determined. In order to precisely determine the value of the exchange coefficient from the definition of the number of true transfer units, the evolution of exchange surface has been studied, based on a photographic determination of droplet diameters in different locations of the column, and of the statistical distribution of these diameters
[fr]
Parmi les extracteurs existant dans l'industrie, la colonne pulsee a plateaux perfores est l'un des plus efficaces. L'analyse des conditions de fonctionnement de la colonne a montre que l'efficacite n'augmente pas indefiniment avec l'intensite d'agitation. Ainsi lorsqu'on etudie les variations de l'efficacite en fonction du produit de l'amplitude de la pulsation par sa frequence, on peut remarquer que l'efficacite augmente, passe par un maximum et puis decroit. En effet, l'augmentation de l'agitation accroit l'aire interfaciale S, et, peut etre, le coefficient d'echange global K, ce qui augmente la quantite transferee. Cependant l'ecoulement s'ecarte de plus en plus des conditions de flux piston et le melange longitudinal resultant diminue le potentiel d'echange, ce qui tend a diminuer le transfert de matiere. L'efficacite globale de l'appareil resultant d'une ponderation des divers effets peut augmenter ou diminuer. Au cours de ce travail nous avons donc entrepris l'etude de l'efficacite de la colonne et de la retention de la phase dispersee. Pour analyser le fonctionnement de la colonne nous avons adopte la methode experimentale du profil de concentrations. Comme nos predecesseurs nous avons choisi d'utiliser le modele de Miyaochi pour representer le fonctionnement de notre colonne. Nous avons determine le nombre d'unites de transfert vrai et le nombre de Peclet. Voulant preciser la valeur du coefficient d'echange a partir de la definition du nombre d'unites de transfert vrai nous avons ete conduit a etudier egalement l'evolution de la surface d'echange. Cette etude a ete faite a partir de la determination par technique photographique des diametres des gouttes en divers points de la colonne, ainsi que de la distribution statistique de ces diametres. Enfin, nous avons voulu preciser l'influence de la direction du transfert de matiere sur le fonctionnement de la colonne. Notre expose comporte trois parties principales: - analyse bibliographique qui permettra de justifier les choix effectues pour notre etude, - description de l'appareillage et des produits utilises, et presentation des resultats preliminaires, - analyse et discussion des resultatsOriginal Title
Contribution a l'etude des transferts dans une colonne d'extraction a ecoulements pulses: aire d'echange et influence du sens du transfert
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22 Dec 1976; 228 p; 118 refs.; Available from the INIS Liaison Officer for France, see the INIS website for current contact and E-mail addresses; These Docteur de 3eme cycle, Specialite: Science et Techniques des Procedes Chimiques
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AbstractAbstract
[en] The experimental determination of process parameters of liquid-liquid extraction is shown. Basic information on various factors influencing the extraction system can be obtained by using radioactive tracers. Examples are presented and discussed. (author)
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Akademie der Wissenschaften der DDR, Leipzig. Zentralinstitut fuer Isotopen- und Strahlenforschung; 355 p; Jun 1983; p. 23-33; 2. working meeting 'radioisotope application and radiation processing in industry'; Leipzig (German Democratic Republic); 28 Sep - 1 Oct 1982
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AbstractAbstract
[en] In this paper, a technique for calculating the stationary transfer of a multicomponent isotopic mixture in squared-off cascades is considered. The proposed method is based on quasi-linearization of the equation system describing the process of multicomponent separation. The transition to relative component concentrations is used to exclude unknown boundary conditions. The suggested method reduces the time of cascade calculation. (orig.)
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Sengupta, A. K.
Proceedings of the 24. International Symposium on Physico-Chemical Methods of Separation - Ars Separatoria 20092009
Proceedings of the 24. International Symposium on Physico-Chemical Methods of Separation - Ars Separatoria 20092009
AbstractAbstract
No abstract available
Primary Subject
Source
Trochimczuk, A.W.; Walkowiak, W. (Faculty of Chemistry, Wroclaw University of Technology, Wroclaw (Poland)) (eds.); Wroclaw University of Technology, Wroclaw (Poland); Nicolaus Copernicus University in Torun (Poland); [275 p.]; ISBN 978-83-7493-463-3;
; 2009; p. 16; 24. International Symposium on Physico-Chemical Methods of the Mixtures Separation - Ars Separatoria 2009; Kudowa Zdroj (Poland); 14-18 Jun 2009

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AbstractAbstract
[en] Liquid-liquid extraction is a method in which the mass transfer of a constituent in solution occurs between two non-totally liquid phases. If we consider a binary solution (A-B) that we have to separate by liquid-liquid extraction: this method requires the introduction of a solvent which extracts preferentially one of the two constituents of the considered solution, for instance A. One of the main application field of this method is the hydrometallurgy and the nuclear industry (separation of metals in solution, treatment of spent nuclear fuels, concentration of solutions without a too important energy supply in opposition to distillation or evaporation). (O.M.)
Original Title
Genie des procedes. Bases theoriques. Transfert de matiere. Extraction liquide-liquide
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Journal Article
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Techniques de l'Ingenieur. Genie et Procedes Chimiques. J 1, Notions de Base; ISSN 1257-6468;
; v. J1(J106); p. J1073.1-J1073.13

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