Case Study

Mini-Spray Dryer Encloser Solution For Pharmaceutical Application

Mini-Spray Dryer Encloser Solution For Pharmaceutical Application

Purpose: Flow Sciences was approached to design and build an enclosure that could house the Buchi B-290 Mini-Spray Dryer during process. Particle sizes would range from 1 to 25 µm, requiring the enclosure to offer containment down to less than one microgram per cubic meter. The client planned to weigh API and dissolve weighed sample into various solvents which would then be introduced into the Buchi B-290.

Process: 50 grams of powder would be dissolved in 725ml methanol outside of the enclosure. Liquid will then be brought into the enclosure in a sealed container and fed into the peristaltic pump of the B290. The maximum amount of powder dissolved in liquid of API at one time is 50g. Upon connecting to the B-290, the client would be spray-drying at a rate of 15mL/min. Upon completion of the cycle, the client planned to remove the collection vessel, seal it with a cap, and remove the vessel from the enclosure via a pass through on right side. The client would then disassemble the glassware and spray down with a misting wand to get as much powder off as possible and then bag out through a continuous liner what glassware was to be sterilized in the cleaning room. All glassware was to be misted, wiped, and then double bagged. Once complete, the client would transfer the product to another room, disassemble all glassware, replace the HEPA filter, and take everything to a cleaning room.

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