Abstract
Solid hollow fiber cooling crystallization (SHFCC) is a new technique suitable for crystal size distribution (CSD) control of aqueous/organic systems from bench to industrial scale. Solid hollow fiber devices possessing good temperature control and operational flexibility can serve as seed/nuclei generators, stand-alone crystallizers, or supersaturation creation devices. Operating schemes implemented include feed recycling, once-through, and solid hollow fiber crystallizer−completely stirred tank (SHFC−CST) in-series operation mode. The performance of SHFCC of aqueous KNO3 solutions was assessed against mixed suspension mixed product removal (MSMPR) crystallizer data. Feed recycling and the once-through operation modes were similar and characterized by broader CSDs and lower reproducibility due to generation of a large number of fines causing slow filtration and localized growth on the filters. SHFC−CST in-series operation proved successful yielding narrow and reproducible CSDs with mean sizes between 100...
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