Fluid and impurity transport during online isolation experiments conducted with X-ray tomography

Sara Ottoboni, Muhid Shahid, Alan Martin, Thokozile Kathyola, Gunjan Das, Sven Schroeder, Shashidhara Marathe, Christopher Rau, Kaz Wanelik, Chris John Price

Research output: Contribution to conferencePaper

Abstract

Pharmaceutical ingredients (API’s) need to be pure and have the required particle size distribution, filtration and washing play an important part in achieving this
Fluid flow and impurity transport during filtration, washing a drying are observed using tomography to:
Visualize the location of impurities during incomplete and complete washing;
Visualize the consequences of non-ideal filtration and washing;
Visualize residual mother liquor inclusions after washing and link these with agglomeration during drying.
A slurry of API particles, and saturated crystallization solution was filtered to dryland or breakthrough. The effect of particle size distribution was evaluated. Iodine was used to mimic impurities dissolved in the mother liquor and the filter cake was washed with n-heptane. The cake was dried at ambient temperature with flowing gas. Tomography was used to identify areas where particle agglomeration during drying is favoured.
Original languageEnglish
Number of pages6
Publication statusAccepted/In press - 12 Apr 2021
Event13th World Filtration Congress - San Diego, United States
Duration: 20 Sep 202124 Sep 2021

Conference

Conference13th World Filtration Congress
Country/TerritoryUnited States
CitySan Diego
Period20/09/2124/09/21

Keywords

  • filtration
  • washing
  • fluid and imputiry flow
  • agglomeration
  • tomography

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