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Development of a novel continuous filtration unit for pharmaceutical process development and manufacturing

Ottoboni, Sara and Price, Chris J. and Steven, Christopher and Meehan, Elizabeth and Barton, Alastair and Firth, Paul and Mitchell, Andy and Tahir, Furqan (2019) Development of a novel continuous filtration unit for pharmaceutical process development and manufacturing. Journal of Pharmaceutical Sciences, 108 (1). pp. 372-381. ISSN 0022-3549

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    Abstract

    The lack of a commercial laboratory, pilot and small manufacturing scale dead end continuous filtration and drying unit it is a significant gap in the development of continuous pharmaceutical manufacturing processes for new active pharmaceutical ingredients (APIs). To move small-scale pharmaceutical isolation forward from traditional batch Nutsche filtration to continuous processing a continuous filter dryer prototype unit (CFD20) was developed in collaboration with Alconbury Weston Ltd. The performance of the prototype was evaluated by comparison with manual best practice exemplified using a modified Biotage VacMaster unit to gather data and process understanding for API filtration and washing. The ultimate objective was to link the chemical and physical attributes of an API slurry with equipment and processing parameters to improve API isolation processes. Filtration performance was characterized by assessing filtrate flow rate by application of Darcy's law, the impact on product crystal size distribution and product purity were investigated using classical analytical methods. The overall performance of the 2 units was similar, showing that the prototype CFD20 can match best manual lab practice for filtration and washing while allowing continuous processing and real-time data logging. This result is encouraging and the data gathered provides further insight to inform the development of CFD20.