Alternative process for recovery of chrome(III)-effluents / Jaime Cot in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 92, N° 4 (07-08/2008)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 92, N° 4 (07-08/2008) . - p. 139-149 Titre : Alternative process for recovery of chrome(III)-effluents Type de document : texte imprimé Auteurs : Jaime Cot, Auteur ; Agusti Marsal, Auteur ; Albert M. Manich, Auteur ; Pedro J. Celma, Auteur ; F. Fernandez, Auteur ; J. Cot-Gores, Auteur Année de publication : 2008 Article en page(s) : p. 139-149 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bisulfite de sodium Eaux usées -- Epuration Eaux usées -- Teneur en chrome Fluidisation Glucose Gommes et résines Oxydoréduction Peroxyde d'hydrogène Le peroxyde d'hydrogène (H2O2), communément appelé eau oxygénée ou encore perhydrol (appellation industrielle), est un composé chimique liquide et visqueux, aux puissantes propriétés oxydantes (il est aussi réducteur). C'est donc un agent blanchissant efficace qui sert de désinfectant et (à haute concentration) d'oxydant ou monergol dans les fusées spatiales. Récupération (Déchets, etc.) Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : This scheme aims to set up an alternative process to recover chrome(III) from tannery effluents. The use of the conventional technique of alkaline precipitation (magnesium oxide) of chromium(III) is well known from the literature and is in daily practice in tanneries worldwide. This technique may in fact represent the cheapest treatment nowadays; however, the latest economic studies have revealed the influence of parameters that could significantly alter investment costs and thus open a door to alternative processes. The main problems that the precipitation technique carries with it are : - a) the presence of highly masked chrome(III) complexes, difficult to precipitate even in alkaline medium. - b) the speed of precipitation and the density of the precipitate can be a major problem. Sometimes, the application of heat is required. - c) filtration of the precipitate and subsequent drying to remove possibly 30% of the water content of the chromecake (various techniques are used). - d) recovered chrome(III) obtained by re-dissolving the cake with sulphuric acid and final adjustment to 33°Sch basicity can occlude large amounts of highly masked chrome (III) complexes which, in turn, produce uneven dyed grain surfaces ; limiting dyeing to dark shades. Furthermore, basic factors such as energy consumption, the lengthy nature of the overall process, the simple but numerous stages, and limited coverage of fashion colours indicate that an alternative process is possible. This part of the work aims to recover the chromium1 of wastewater coming from the various chrome using processes and, at the same time, to get an effluent that can be used directly without complementary treatments. It is important to give a clearer and detailed idea of the developed process. Note de contenu : - INTRODUCTION : Resin selection - Wastewater oxidation process - Wastewater loading - Chromium reduction process - EXPERIMENTAL PROCEDURE : Equipment and reagents used - Resin Amberlite IRA-96 - Sample preparation - Wastewater load and reduction - Fluidisation system - Fluidisation mechanism (see appendix for symbols) - Calculation off luidisation for the pilot plant - Reduction in a batch system - Table 1 : Amberlite IRA-96 resin characteristics - Table 2 : Optimal operation conditions - Table 3 : Chromium recovered using acid hydrogen peroxide as reducer - Table 4 : Chromium recovered using sodium bisulphite as reducer - Table 5 : Chromium recovered using glucose as reducer En ligne : https://drive.google.com/file/d/1k7CnOQf4zEsbildKyaGXxsI_elC93m2i/view?usp=share [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38963 [article]

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Blade runner / Reg Freeman in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 194, N° 4481 (10/2004)

[article]  inPOLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 194, N° 4481 (10/2004) . - p. 15-17 Titre : Blade runner Type de document : texte imprimé Auteurs : Reg Freeman, Auteur Année de publication : 2004 Article en page(s) : p. 15-17 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Automobiles -- Revêtements:Automobiles -- Peinture Fluidisation Revêtements poudre:Peinture poudre Index. décimale : 667.9 Revêtements et enduits Résumé : The French automotive industry has improved the control of powder flow in the fluidisation bed thanks to a new measuring system. As margins in the automotive industry come under increased pressure, companies are looking to optimise processes and save money in every aspect of their manufacturing. In addition, many car manufacturers see the introduction of innovative technologes as a key strategy in their efforts to stay ahead of the competition. Finishing and powder coating is a critical process in automotive manufacturing and one where cost optimisation and innovation are key. To achieve a high-quality finish from a powder coating, complete and accurate information about powder flowability is essential. A powder coating must be free-flowing and it must fluidise well in the fluidisation bed. This ensures that individual particles are separated, improving the electrostatic charge that can be applied to the powder so that flow more easily through the spray gun to give an even finish. The flowability of a powder is also important in powder recovery - a free-flowing powder will not clump during recovery, reducing the amount of waste. Automotive powder coatings are a mixture of several components, such as resin, crosslinker, pigments, flow aids and degassing solvent. Their flowability is affected by many factors, most being especially sensitive to moisture adsorption and exposure to heat, for example. The way they are stored can also have a large impact on their subsequent performance in the spray painting booth. Smooth fluidisation is a key goal, and the ability to achieve this depends on finding the optimal balance of critical parameters such as particle shape, size distribution, flow characteristics, moisture content, air velocity, humidity and ratio of powder depth to the bed floor area. A powder rheometer can quantify a powder's flowability under a range of conditions and give valuable information about how it will perform in a fluidised bed. Note de contenu : - Fixing the mix - The complexity of powders - How does a rheometer work ? - In practice Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27698 [article]

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La combustion en boucle chimique / Thierry Gauthier in L'ACTUALITE CHIMIQUE, N° 371-372 (02-03/2013)  

[article]  inL'ACTUALITE CHIMIQUE > N° 371-372 (02-03/2013) . - p. 52-56 Titre : La combustion en boucle chimique : Un procédé en rupture pour le captage du CO2 Type de document : texte imprimé Auteurs : Thierry Gauthier, Auteur ; Florent Guillou, Auteur ; Stéphane Bourgeon, Auteur ; Hélène Stainton, Auteur Année de publication : 2013 Article en page(s) : p. 52-56 Note générale : Bibliogr. Langues : Français (fre) Catégories : Combustion en boucle chimique Dioxyde de carbone -- Capture Fluidisation Gaz à effet de serre -- Réduction Index. décimale : 628.53 Pollution de l'air et lutte antipollution Résumé : La combustion en boucle chimique (CLC) est une technique prometteuse de combustion d'hydrocarbures en l'absence d'azote qui permet de réduire la pénalité énergétique associée au captage du CO2. À ce jour, le concept CLC est bien démontré. En 2008, IFPEN et Total ont démarré une collaboration ambitieuse pour développer le procédé. Cet article présente les principaux résultats obtenus dans ce cadre et les perspectives. Le CLC est une voie de captage prometteuse en comparaison avec les autres voies disponibles. Néanmoins, il faut prendre en compte les incertitudes liées à l'émergence du marché du CO2 et d'autres applications du CLC doivent donc être également considérées. Note de contenu : - LE CONCEPT DE COMBUSTION EN BOUCLE CHIMIQUE - DU CONCEPT AUD DEVELOPPEMENT - LE PROGRAMME DE DEVELOPPEMENT DE IFPEN ET TOTAL : Les études conduites - Principaux résultats obtenus - Perspectives En ligne : https://new.societechimiquedefrance.fr/numero/la-combustion-en-boucle-chimique-u [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17682 [article]

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A critical review of techniques and technology of tablet coating / Nana Satpute in PAINTINDIA, Vol. LXXII, N° 10 (10/2022)  

[article]  inPAINTINDIA > Vol. LXXII, N° 10 (10/2022) . - p. 70-77 Titre : A critical review of techniques and technology of tablet coating Type de document : texte imprimé Auteurs : Nana Satpute, Auteur ; Ganesh Zade, Auteur Année de publication : 2022 Article en page(s) : p. 70-77 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Comprimés Enrobage (technologie) Enrobage pharmaceutique Evaluation Fluidisation Liants Pigments Plastifiants Polymères Revêtements organiques solvants Index. décimale : 667.9 Revêtements et enduits Résumé : Pharmaceutical drug coatings are highly advantageous and considerable development has recently happened to enhance the quality of the tablet. Tablet coating is carried out for the purposes such as decoration and protection of tablets along with some functional properties. The coating is a homogeneous mixture of polymeric material ; a very thin layer is applied on a substrate of the drug by using various techniques. These coatings techniques are either manually operated or fully automated. The automatic process gives coating with more uniform film properties at a high production rate. The coating is the last unit operation in the manufacturing of drugs in the pharmaceutical industries. Tablet coating involves the use of various binders, colour forming agents (colorants), organic solvents and plasticizers to get the required characteristics. Coating a tablet is always a great challenge to coating a formulator as it involves various statutory requirements to qualify as well as technically it also performs well against various environmental changes. Coating plays a key role in the pharma industry to protect the drugs from different environmental challenges like changes in humidity, light, heat etc. Now a days in coating application industries various new coating techniques are available like spray and fluidised bed methods that are developed to overcome the limitations of old techniques. This review paper focuses on the various aspects of various raw materials, types of tablet coating, processes of tablet coatings, defects and remedies of tablet coatings etc. Note de contenu : - PURPOSE OF COATING THE TABLET - TABLET COATING MECHANISM : Types of coatings - Sugar coating - FILM COATING - RESIN - PIGMENTS : Requirements of good pigment - PLASTICIZER - SOLVENT : Requirements of good solvent - Advantages of film coating over sugar coatings - Tablet coating defects and remedies - Colour variation - Orange peel - Blooming - Twinning - BListering/pinholes - Cracking - Chipping - EVALUATION OF TABLET COATING - ASPECTS OF TABLE COATING CHARACTERISATION - Fig. 1 : Electrostatic dry coating system - Fig. 2 : Classification of pigments - Fig. 3 : Film coating process flow diagram En ligne : https://drive.google.com/file/d/10h7iu-swNzc7oRVBjKC-cWyRuyx732mn/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38539 [article]

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Degradation of azo dye by the fluidised-bed Fenton process / Massakul Pukdee-Asa in COLORATION TECHNOLOGY, Vol. 128, N° 1 (2012)  

[article]  inCOLORATION TECHNOLOGY > Vol. 128, N° 1 (2012) . - p. 28-35 Titre : Degradation of azo dye by the fluidised-bed Fenton process Type de document : texte imprimé Auteurs : Massakul Pukdee-Asa, Auteur ; Chia-Chi Su, Auteur ; Chavalit Ratanatamskul, Auteur ; Ming-Chun Lu, Auteur Année de publication : 2012 Article en page(s) : p. 28-35 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Colorants -- Détérioration Colorants azoïques Fenton, Réaction de Fluidisation Index. décimale : 667.6 Peintures Résumé : A fluidised-bed Fenton process was utilised for the homogeneous and heterogeneous Fenton degradation of three azo dyes: CI Reactive Black 5, CI Reactive Orange 16 and CI Reactive Blue 2. The effects of the concentration of Fe2+ and hydrogen peroxide on the decolorisation and degradation of the azo dyes were examined. More than 96% of colour removal of the azo dyes was achieved using the fluidised-bed Fenton process. Chemical oxygen demand (COD) removal of the three azo dyes followed pseudo-second-order kinetics at various Fe2+ and hydrogen peroxide concentrations. COD removal of the three azo dyes increased with increasing Fe2+ concentration and was more than 85%. In addition, the COD removal efficiency of the three types of azo dyes first increased and then decreased as the hydrogen peroxide concentration increased. Presumably, the scavenging effect of hydrogen peroxide on hydroxyl radicals occurs at high concentrations of hydrogen peroxide. The most efficient COD removal was found at 160–220 mg/l hydrogen peroxide. More than 80% of the COD was eliminated at pH 3 in 20 mg/l Fe2+ and 160 mg/l hydrogen peroxide for CI Reactive Black 5, 25 mg/l Fe2+ and 160 mg/l hydrogen peroxide for CI Reactive Orange 16 and 20 mg/l Fe2+ and 160 mg/l hydrogen peroxide for CI Reactive Blue 2. Note de contenu : - EXPERIMENTAL : Materials - Methods and reactor - RESULTS AND DISCUSSION : Effect of different carriers on the removal of azo dyes - Effect of Fe2+ and hydrogen peroxide concentrations - Comparison of COD removal efficiency DOI : 10.1111/j.1478-4408.2011.00325.x En ligne : http://onlinelibrary.wiley.com/doi/10.1111/j.1478-4408.2011.00325.x/pdf Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13094 [article]

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Eléments de physique statistique appliqués à la rhéologie des milieux granulaires non-cohésifs : le modèle du château de sables mouvants / Z. Toutou in RHEOLOGIE, Vol. 5 (06/2004)  

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Etude de l'hydrophobisation pour un traitement chimique des solides divisés en lit fluidisé / Myriam Lazghab / 2006

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Fluidisation improvements / Laurent Fosbach in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 195, N° 4488 (05/2005)

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Functionalised powder coatings for polymers / Andreas Rank in EUROPEAN COATINGS JOURNAL (ECJ), N° 11 (11/2021)  

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Poudres pour revêtement. Partie 5 : Détermination de l'aptitude à la fluidisation d'un mélange poudre/air - Norme ISO 8130-5 / International Organization for Standardization (Genève, Suisse) / Geneve [Switzerland] : International Organization for Standardization (ISO) (1992)

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Slow-release fertilizers based on lignin–sodium alginate biopolymeric blend for sustained N–P nutrients release / Fatima-Zahra El Bouchtaoui in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 5 (09/2022)  

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Technologies à lit fluidisé et de lit à jet / Michael Jacob in EXPRESSION COSMETIQUE, N° 60 (11-12/2019)  

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The effect of different materials on the coating of baker’s yeast (Saccharomyces cerevisiae) with the fluidized bed method / Semra Bozkurt in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 20, N° 5 (09/2023)  

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The use of engineered silica to enhance coatings / Jim Reader in COATINGS TECH, Vol. 17, N° 6 (06/2020)  

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