Today’s active pharmaceutical ingredients (APIs) are increasingly complex in structure and challenging for isolation. Effective API particle engineering is playing a critical role in meeting the demands for drug substance and drug product development. Although crystallization process is desired and commonly used as final isolation step for API production, there are many practical challenges from early process development to process scale-up and implementation in the plant. Some of the challenges are inherently related to the molecular structure and/or API crystal properties, such as high solvation propensity, low chemical stability, high oiling tendency, impurity/API structure similarity, etc.. Some are related to the inherent scale-up issues of batch processing, with drastic changes in mass, heat, and momentum transfers in large batch crystallizers. At AIChE annual conference next week, I'll present in the “495 Continuous Crystallization Processes” session and share case studies when continuous crystallization offers robust processing solutions to challenging APIs that are otherwise hard to isolate and produce at large scale. I look forward to fruitful discussions and further learning. #AIChE #crystallization #continuouscrystallization #particleengineering #API #isolation
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1moEchoing the case study you mentioned, there are studies showing that yield and purity can be significantly improved by using continuous crystallization. How do you think this data will impact real-world applications?