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Integrated Continuous Wet Granulation and Drying: Process Evaluation and Comparison with Batch Processing

ORCID
0000-0001-6072-1959
Affiliation
Merck & Co., Inc., West Point, PA 19486, USA
Forster, Seth P.;
ORCID
0000-0003-4265-4531
Affiliation
Merck & Co., Inc., West Point, PA 19486, USA
Dippold, Erin;
Affiliation
Organon & Co., Inc., Jersey City, NJ 07302, USA
Haser, Abbe;
Affiliation
L.B. Bohle Maschinen und Verfahren GmbH, 59320 Ennigerloh, Germany;(D.E.);(R.M.)
Emanuele, Daniel;
Affiliation
L.B. Bohle Maschinen und Verfahren GmbH, 59320 Ennigerloh, Germany;(D.E.);(R.M.)
Meier, Robin

The pharmaceutical industry is in the midst of a transition from traditional batch processes to continuous manufacturing. However, the challenges in making this transition vary depending on the selected manufacturing process. Compared with other oral solid dosage processes, wet granulation has been challenging to move towards continuous processing since traditional equipment has been predominantly strictly batch, instead of readily adapted to material flow such as dry granulation or tablet compression, and there have been few equipment options for continuous granule drying. Recently, pilot and commercial scale equipment combining a twin-screw wet granulator and a novel horizontal vibratory fluid-bed dryer have been developed. This study describes the process space of that equipment and compares the granules produced with batch high-shear and fluid-bed wet granulation processes. The results of this evaluation demonstrate that the equipment works across a range of formulations, effectively granulates and dries, and produces granules of similar or improved quality to batch wet granulation and drying.

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