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Evaluation and simultaneous optimization of some pellets characteristics using a 3(3) factorial design and the
P G Paterakis1, E S Korakianiti, P P Dallas
1Division of Pharmaceutical Technology, School of Pharmacy, University of Athens, Panepistimiopolis, Zografou, Hellas, Greece.
International Journal of Pharmaceutics
|November 14, 2002
Summary
Optimizing pellet production using wet granulation, this study found microcrystalline cellulose content and air temperature significantly impact pellet size and shape. Spray rate is key for particle size distribution.
Area of Science:
- Pharmaceutical Technology
- Chemical Engineering
- Materials Science
Background:
- Pelletization is a crucial unit operation in pharmaceutical manufacturing.
- Fluid bed rotor granulation offers efficient pellet formation.
- Understanding process variables is essential for reproducible pellet quality.
Purpose of the Study:
- To investigate the impact of formulation and processing variables on pellet characteristics.
- To establish quantitative relationships between variables and pellet attributes.
- To optimize the wet granulation process for desired pellet properties.
Main Methods:
- A 3(3) full factorial design was utilized to study three variables.
- Variables included microcrystalline cellulose content, inlet air temperature, and spray rate.
- Pellet size, size distribution, roundness, elongation, and e(R) were analyzed.
Main Results:
- Microcrystalline cellulose content, air temperature, and spray rate significantly affected pellet size and shape (P<0.05).
- Spray rate was the sole significant factor influencing particle size distribution.
- Significant interactions between factors were observed for size and shape parameters.
Conclusions:
- Multiple regression analysis yielded equations describing variable-response relationships.
- Process optimization using desirability function indicated optimal conditions.
- Achieving desired pellet properties requires low microcrystalline cellulose and air temperature, with a high spray rate.