Download or read book CONTRIBUTION A L EXTRACTION LIQUIDE LIQUIDE DE L ALUMINIUM III EN MILIEU ACIDE written by Frédéric Fabre (professeur d'histoire-géographie).) and published by . This book was released on 1983 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt: ASPECTS ECONOMIQUES D'UN PROCEDE INDUSTRIEL D'EXTRACTION PAR SOLVANT. TYPES D'EXTRACTION ET PRINCIPAUX EXTRACTANTS INDUSTRIELS UTILISES EN HYDROMETALLURGIE. BIBLIOGRAPHIE DE L'EXTRACTION LIQUIDE-LIQUIDE DE L'AL. RESULTATS EXPERIMENTAUX MONTRANT QUE CETTE EXTRACTION EST DELICATE: LES EXTRACTANTS PEU NOMBREUX, SONT DES ECHANGEURS DE CATIONS ACIDES QUI FORMENT AVEC AL(III) DES COMPLEXES. EXPLICATIONS ET MOYENS DE REMEDIER A LA LENTEUR DES CINETIQUES D'EXTRACTION ET DE DESEXTRACTION

Download or read book CONTRIBUTION A L ETUDE DES EFFETS DE SELS SUR LA CINETIQUE DE TRANSFERT DE PHASE EN EXTRACTION LIQUIDE LIQUIDE APPLICATION A L HYDROMETALLURGIE written by CELINE.. BOUVIER and published by . This book was released on 1997 with total page 239 pages. Available in PDF, EPUB and Kindle. Book excerpt: DANS LES PROCEDES HYDROMETALLURGIQUES METTANT EN OEUVRE LA TECHNIQUE D'EXTRACTION LIQUIDE-LIQUIDE, LES SOLUTIONS AQUEUSES TRAITEES SONT SOUVENT FORTEMENT CONCENTREES EN SELS ET/OU EN ACIDES. OR, DE TELS MILIEUX SONT A L'ORIGINE D'EFFETS DE RELARGAGE SPECTACULAIRES (EFFETS THERMODYNAMIQUES), QUI ONT ETE LARGEMENT ETUDIES. EN REVANCHE, L'ASPECT CINETIQUE DU PROBLEME A ETE TRES PEU ABORDE. LE BUT DU PRESENT TRAVAIL A DONC ETE D'ETUDIER L'INFLUENCE DE LA TENEUR EN SELS SUR LA CINETIQUE D'EXTRACTION LIQUIDE-LIQUIDE DES ESPECES METALLIQUES. L'ETUDE BIBLIOGRAPHIQUE A MONTRE QUE LES PHENOMENES MIS EN JEU SONT VARIES ET COMPLEXES ET SOUVENT MAL CONNUS DU FAIT DE LA CONJUGAISON DE PROCESSUS CHIMIQUES (REACTIONS) ET PHYSIQUES (DIFFUSION, ADSORPTION/DESORPTION INTERFACIALES,) DANS LES TRANSFERTS DE PHASE. TROIS EXEMPLES CORRESPONDANT A DES SITUATIONS PHYSICO-CHIMIQUES VARIEES ONT ETE ETUDIES : L'EXTRACTION DU CUIVRE(II) PAR L'ACORGA CLX-50, L'EXTRACTION DU FER(III) PAR LE HDEHP ET L'EXTRACTION DU GERMANIUM(IV) PAR LE KELEX 100. L'ORIGINE ET L'AMPLITUDE DE LA VARIATION DE LA VITESSE D'EXTRACTION EN FONCTION DE LA SALINITE SONT TRES DIFFERENTES D'UN SYSTEME A UN AUTRE. AINSI, L'ACCROISSEMENT D'UN FACTEUR 12 DE LA VITESSE D'EXTRACTION DU CUIVRE(II) POUR UNE VARIATION DE LA FORCE IONIQUE DE 4 MOL/L, A UNE ORIGINE ESSENTIELLEMENT THERMODYNAMIQUE (PHENOMENE DE RELARGAGE) VIA UN PROCESSUS DIFFUSIONNEL. EN CE QUI CONCERNE L'EXTRACTION DU FER(III) ET CELLE DU GERMANIUM(IV), DONT LES CINETIQUES SONT CONTROLEES PAR LES REACTIONS CHIMIQUES, LES VARIATIONS DU FLUX INITIAL D'EXTRACTION AVEC LA TENEUR EN SELS SONT BEAUCOUP PLUS FAIBLES (FACTEUR 2 A 3). L'EFFET NEGATIF (RALENTISSEMENT) OBSERVE DANS LE CAS DE L'EXTRACTION DU FER(III) PREND ESSENTIELLEMENT SON ORIGINE DANS LA VARIATION DE L'ACTIVITE DES IONS H#+, TANDIS QUE L'EFFET DE SELS POSITIF (ACCELERATION) SUR L'EXTRACTION DU GERMANIUM(IV) RESULTE PRINCIPALEMENT DE LA VARIATION DU COEFFICIENT D'ACTIVITE DU GERMANIUM(IV) EN PHASE AQUEUSE.

Download or read book EXTRACTION DU GALLIUM III EN MILIEU ACIDE written by Marie-Sabine Faux-Mallet and published by . This book was released on 1988 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: COMPARAISON DES AVANTAGES ET DES INCONVENIENTS DE L'EXTRACTION A L'AIDE DE RESINES ET DE L'EXTRACTION LIQUIDE-LIQUIDE EN VUE DE PRECISER LEUR DOMAINE RESPECTIF D'UTILISATION EN HYDROMETALLURGIE. ETUDE DE LA SEPARATION DU GALLIUM CONTENU DANS LES SOLUTIONS D'ATTAQUE DES MINERAIS DE ZINC. UTILISATION DE LA RESINE DUOLITE ES467 ET POUR L'EXTRACTION LIQUIDE-LIQUIDE DE L'HYDROXY-8 QUINOLEINE ET D'UNE ALPHA-HYDROXY-OXIME

Download or read book The Solvent Extraction of Metal Chelates written by Jiří Starý and published by Elsevier. This book was released on 2013-10-22 with total page 255 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Solvent Extraction of Metal Chelates is a comprehensive account of the solvent extraction (liquid-liquid extraction) of metal chelate complexes. Topics covered include the composition and stability of metal chelates; analytical applications of the solvent extraction of metal chelates; and selective extraction procedures for metals. A theoretical treatment of the solvent extraction of metal chelates is also given. This book is comprised of six chapters and begins with an overview of solvent extraction and how it can be used to solve important theoretical problems concerning the composition and stability of soluble and insoluble metal complexes. The next chapter examines the composition and stability of metal chelates based on the assumption that only uncharged complexes are dissolved and extracted by the organic solvents. A theory of the solvent extraction of metal chelates is then described, paying particular attention to a variety of factors that influence the extraction of metal chelates, including acidity, solubility and instability of the metal chelate, and organic solvent. Some analytical applications of the solvent extraction of metal chelates are also considered. The last two chapters deal with systems and selective extraction procedures for metals. This monograph will be of particular value to inorganic and analytical chemists.

Download or read book Origin and Distribution of the Elements written by Louis Herman Ahrens and published by Pergamon. This book was released on 1979 with total page 934 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Organic Acids in Man written by R. Chalmers and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 531 pages. Available in PDF, EPUB and Kindle. Book excerpt: The writing of this book was prompted by the need for a comprehensive of current data on organic acids suitable for both newcomers and collection established researchers in this field. The only previous text of the kind was the excellent review by Nordmann and Nordmann (1961), and at that time the main method of analysis was paper chromatography with liquid chromatography being used in a limited way. Only three diseases in which organic acids accumulate were known (primary hyperoxaluria, phenylketonuria and alcaptonuria). Since then, with the development of gas chromatography and mass spectrometry, and the further development ofliquid chromatography, knowledge concerning the nature of the organic acids in physiological fluids has been greatly extended. At the same time, the number of organic acidurias has increased dramatically, there being now some 40-50 known diseases of this type. During the past 15 years or so, there have been several reviews, dealing with either specific diseases or groups of diseases (Gompertz, 1972, 1974; Tanaka, 1975), or presenting the proceedings of symposia (Stern and Toothill, 1972) or workshops (Marner et al. , 1974). This present text deals comprehensively and in detail with the organic acids in human physiological fluids in health and in disease states, and is particularly concerned with the methods necessary for their separation, determination and indentification.

Download or read book Advances in Solid State Fermentation written by S. Roussos and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 641 pages. Available in PDF, EPUB and Kindle. Book excerpt: G.HAINNAUX Departement Milieu et Activites Agricoles, Centre ORSTOM, 911 Avenue d' Agropolis, B.P. 5045, 34032 Montpellier Cedex , France. Solid state fermentation, popularly abbreviated as SSF, is currently investigated by many groups throughout the world. The study of this technique was largely neglected in the past in European and Western countries and there is now a high demand for SSF, meaning in food, environment, agricultural, phannaceutical and many other biotechnological applications. It gives me satisfaction to note that the importance of this technique was realised at my department way back in 1975 since then, our team has put concentrated efforts on developing this technique. xvii Foreword Advances in Solid State Fermentation Foreword M. PUYGRENIER Agropolis Valorisation, Avenue d' Agropolis, 34394 Montpellier Cedex 5, France. On the name of the Scientific Community, I would like to express the wish that this International Symposium on SSF should be successful. Solid State Fermentation is part of biotechnology research. It consists on seeding solid culture medium with bacteria or fungi (filamentous or higher) and on producing, in this medium (solid components and exudates) metabolites and high value products. In fact, this process is very old. In older industries such the food and agricultural, this technique has been extensively used. An example of this is the production of pork sausages and Roquefort cheese. Pharmaceutical industry could make extensive use of SSF in the production of secondary metabolites of many kinds and development in this direction is soon expected.

Download or read book Production of Yellow Cake and Uranium Fluorides written by International Atomic Energy Agency and published by . This book was released on 1980 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Index Medicus Third Series written by and published by . This book was released on 1921 with total page 1284 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Index Medicus written by and published by . This book was released on 1921 with total page 1294 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Coal Tar Creosote written by C. Melber and published by WHO. This book was released on 2004 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt: On cover: IPCS International Programme on Chemical Safety. Published under the joint sponsorship of the United Nations Environment Programme, the International Labour Organization and the World Health Organization, and produced within the framework of the Inter-organization Programme for the Sound Management of Chemicals (IOMC)

Download or read book Advances in Uranium Ore Processing and Recovery from Non conventional Resources written by International Atomic Energy Agency and published by Agency. This book was released on 1985 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Modelling in Aquatic Chemistry written by OECD Nuclear Energy Agency and published by Nuclear Energy Agency. This book was released on 1997 with total page 788 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Elemental Speciation in Human Health Risk Assessment written by P. Apostoli and published by World Health Organization. This book was released on 2006 with total page 257 pages. Available in PDF, EPUB and Kindle. Book excerpt: Definitions of species and speciation - - Strructural aspects of speciation - - Analytical techniques and methodology - - Bioaccessibility and bioavailability - - Toxicokinetics and biological monitoring - - Molecular and cellular mechanisms of metal toxicity - - Health effects - - Conclusions and recommendations.

Download or read book Catalogue of Scientific Papers written by Royal Society (Great Britain) and published by . This book was released on 1916 with total page 1032 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Frontline and Factory written by Roy MacLeod and published by Springer Science & Business Media. This book was released on 2007-05-06 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book represents a first considered attempt to study the factors that conditioned industrial chemistry for war in 1914-18. Taking a comparative perspective, it reflects on the experience of France, Germany, Austria, Russia, Britain, Italy and Russia, and points to significant similarities and differences. It looks at changing patterns in the organisation of industry, and at the emerging symbiosis between science, industry and the military.

Download or read book Water Research written by and published by . This book was released on 1976 with total page 622 pages. Available in PDF, EPUB and Kindle. Book excerpt: