Development of a low cost environmentally cleaner process for anatase and rutile phase titanium dioxide particles / G.D. Surender in PAINTINDIA, Vol. LV, N° 7 (07/2005)

[article]  inPAINTINDIA > Vol. LV, N° 7 (07/2005) . - p. 51-66 Titre : Development of a low cost environmentally cleaner process for anatase and rutile phase titanium dioxide particles Type de document : texte imprimé Auteurs : G.D. Surender, Auteur Année de publication : 2005 Article en page(s) : p. 51-66 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 667.9 Revêtements et enduits Résumé : dian paint industry has established itself as a major contributor to India's wealth and employment creation as well as producing value added goods and services to society at large. In order to achieve sustainability and global competitiveness, there is a pressing need to reduce the manufacturing costs and enhance its product performance through innovation in the manufacture of titanium dioxide with low costs, environmental acceptance and from the vast indigenous resource of ilmenite mineral. This paper highlights a novel process to achieve low cost production of both anatase and rutile phase TiO2 in a single flexible process through the applications of a novel process employing the vapour phase hydrolysis of titanium chloride. Rutile grade titanium dioxide is obtained through the use of an organic dopant at low temperature. Very significant cost advantages is perceived due to the much lower temperatures of operation and the use of water vapour instead of pure oxygen as in the existing chloride process. With a view to interpret and understand the relationship between titanium dioxide particle characteristics and the process conditions, a new mechanism of nucleation and particle growth has been proposed and the model is validated with the experimental results. The comprehensive nature of the work involving novel experimental work, an innovative process and a knowledge based quantitative interpretations of the results is expected to establish a firm foundation to demonstrate the process at larger scales, leading to an enormous impact on the paint industry. Note de contenu : - Crucial role of titanium dioxide in paint industry - Synthesis of anatase phase titanium dioxide particles through a low temperature (<387K) vapour phase hydrolysis of titanium tetrachloride - Experimental procedure - Characterization of titania powders - Result and discussion - Effect of process conditions on the TiO2 powder produced at a reaction temperature of 353K - Effect of process conditions on the TiO2 powder produced at a reaction temperature of 387K - Synthesis of rutile phase titanium dioxide particles through a novel low temperature (<673K) vapour phase hydrolysis of titanium tetrachloride - Experimental procedure and characterization - Justification for less energy consumption - Critical process step in the invention - Scientific basis of invention - Marketable products which could he produced by the use of the innovation - Interpretation of the relationship between titanium dioxide particles and process conditions through mechanistic and computer aided process modeling - Effect of hydrolysis temperature on average particle size - Effect of TiCl4 concentration and H2O/TiCl4 molar ratio on average particle size Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11646 [article]

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