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Microflow system promotes acetaminophen crystal nucleation.

Akari Nishigaki1, Mihoko Maruyama1,2, Munenori Numata1

  • 1Department of Biomolecular Chemistry Kyoto Prefectural University Kyoto Japan.

Engineering in Life Sciences
|September 18, 2020
PubMed
Summary
This summary is machine-generated.

Microflow channels enhance acetaminophen crystallization by creating a liquid-liquid interface for uniform mixing. This method improves crystal formation and allows control over polymorphs, offering a new tool for crystallization processes.

Keywords:
anti‐solvent methodlaminar flowliquid–liquid interfacemetastable formpolymorph control

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Area of Science:

  • Chemical Engineering
  • Materials Science
  • Crystallization Science

Background:

  • Interfaces significantly influence crystallization from solutions.
  • Controlling crystallization is crucial for pharmaceutical and materials development.
  • Acetaminophen crystallization is a model system for studying crystallization phenomena.

Purpose of the Study:

  • To investigate the effect of microflow channels on acetaminophen crystallization.
  • To explore the role of liquid-liquid interfaces in solvent mixing and crystal formation.
  • To assess the potential of microchannel technology for controlling crystallization and polymorphs.

Main Methods:

  • Utilized a microflow channel to induce laminar flow and create a liquid-liquid interface.
  • Employed the anti-solvent method for acetaminophen crystallization.
  • Varied flow rates within the microchannel to observe effects on crystallization.
  • Analyzed crystal formation and identified polymorphs.

Main Results:

  • Microflow mixing in the channel promoted acetaminophen crystallization more effectively than bulk mixing.
  • Increased flow rates led to enhanced crystal formation.
  • A metastable acetaminophen polymorph was observed under specific flow conditions.
  • Demonstrated uniform solvent mixing at the molecular scale within the microchannel interface.

Conclusions:

  • Microchannel-based liquid-liquid interfaces offer a powerful tool for promoting and controlling crystallization.
  • Interface management within microchannels can be leveraged for targeted polymorph control.
  • This approach provides a novel strategy for optimizing crystallization processes in various applications.