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Microparticles of theophylline were recrystallized using the high-pressure antisolvent technique. A mixture of ethanol and dichloromethane with a volumetric ratio of 1:1 was used as solvents, and compressed CO 2 as antisolvent. The effects of process parameters (temperature, flow rate of solution and antisolvent, drying rate, initial solution concentration, diameter and length of the capillary...
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