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Scale-up of a pharmaceutical granulation in fixed bowl mixer-granulators

Tipo de material: TextoTextoSeries ; International Journal of Pharmaceutics, 133(1-2), p.127-131, 1996Trabajos contenidos:
  • Landin, M
  • York, P
  • Cliff, M.J
  • Rowe, R.C
  • Wigmore, A.J
Tema(s): Recursos en línea: Resumen: Scale-up in fixed bowl mixer-granulators has been studied by applying the classical dimensionless numbers of Power, Reynolds and Froude to end-point prediction in a range of geometrically similar machines. The simple relationship of Power number/Reynolds number, as suggested by previous workers, has been found to be nappropriate for large-scale production machines where corrections have to be made for gross vortexing and powder bed height variation by the incorporation of the Froude number and a scaling factor. When corrections are made, data from 25-, 100- and 600-1 machines all fall on the same curve allowing predictions of optimum granulation end-point conditions to be made for production-scale equipment from measurements on laboratory-scale equipment and vice-versa.
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Scale-up in fixed bowl mixer-granulators has been studied by applying the classical dimensionless numbers of Power, Reynolds and Froude to end-point prediction in a range of geometrically similar machines. The simple relationship of Power number/Reynolds number, as suggested by previous workers, has been found to be nappropriate for large-scale production machines where corrections have to be made for gross vortexing and powder bed height variation by the incorporation of the Froude number and a scaling factor. When corrections are made, data from 25-, 100- and 600-1 machines all fall on the same curve allowing predictions of optimum granulation end-point conditions to be made for production-scale equipment from measurements on laboratory-scale equipment and vice-versa.

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