Nutsche Filters/Dryers for High Purity Solids Ultra-high purity, pharmaceutical, and specialty solids are efficiently filtered, washed, agitated, reslurried and dried in a single portable device, minimizing contamination and exposure. Drying is aided by vacuum and optional heated surfaces. Reactions and particle size homogenization are also possible. In fact this new nutsche filter dryer vessel design allows withdrawal of dry filter cake utilizing removable bottom head and filter support assembly.