Experimental study of the mixing kinetics of binary pharmaceutical powder mixtures in a laboratory hoop mixer

Abstract : As increasingly commented by the literature during the last 5 years, estimating the homogeneity of a powder mixture and following powder mixing processes is not a simple task. In this paper, we present the development and statistical validation of a sampling methodology for defining the number of samples required to provide a reasonable estimation of the homogeneity attained in a laboratory scale tumbler mixer. This method is then used to follow the mixing kinetics of a dilute binary powder mixture in a hoop mixer. Special attention is paid to the statistical meaning of the values obtained and the influence of the physical characteristics such as particle size and shape. The role of the particle shape of the majority powder is particularly emphasised and it is quantitatively demonstrated that spherical particles are harder to mix and more ready to segregate than particles with irregular shapes. The different mixing mechanisms at play are identified; the practical limits of use of such tumbler mixers with pharmaceutical powders are discussed.
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Chemical Engineering Science, Elsevier, 2002, 57 (19), pp.4053-4065. 〈10.1016/S0009-2509(02)00262-2〉
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https://hal.archives-ouvertes.fr/hal-01664122
Contributeur : Imt Mines Albi Ecole Nationale Supérieure Des Mines d'Albi-Carmaux <>
Soumis le : jeudi 14 décembre 2017 - 15:07:50
Dernière modification le : vendredi 29 juin 2018 - 10:50:03

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S Massol‐chaudeur, Henri Berthiaux, John A. Dodds. Experimental study of the mixing kinetics of binary pharmaceutical powder mixtures in a laboratory hoop mixer. Chemical Engineering Science, Elsevier, 2002, 57 (19), pp.4053-4065. 〈10.1016/S0009-2509(02)00262-2〉. 〈hal-01664122〉

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