›› 2008, Vol. 16 ›› Issue (3): 465-473.

• SPECIAL ISSUE OF THE FIRST INTERNATIONAL SYMPOSIUM ON SUSTAINABLE CHEMICAL PRODUCT AND PROCESS ENGINEERING • Previous Articles     Next Articles

Tuning the Morphology of Pharmaceutical Compounds via Model Based Solvent Selection

Arunprakash T. Karunanithi1, Charles Acquah2, Luke E. K. Achenie3   

  1. 1. National Risk Management Research Laboratory, U. S. Environmental Protection Agency, Cincinnati, Ohio, USA;
    2. Department of Chemical, Materials & Biomolecular Engineering, University of Connecticut, Storrs, Connecticut, USA;
    3. Department of Chemical Engineering, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, USA
  • Received:2007-09-12 Revised:2008-05-07 Online:2008-06-28 Published:2008-06-28

Tuning the Morphology of Pharmaceutical Compounds via Model Based Solvent Selection

Arunprakash T. Karunanithi1, Charles Acquah2, Luke E. K. Achenie3   

  1. 1. National Risk Management Research Laboratory, U. S. Environmental Protection Agency, Cincinnati, Ohio, USA;
    2. Department of Chemical, Materials & Biomolecular Engineering, University of Connecticut, Storrs, Connecticut, USA;
    3. Department of Chemical Engineering, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, USA
  • 通讯作者: E. K. Achenie,E-mail:Achenie@vt.edu

Abstract: In this paper we present a strategy for tuning the crystal morphology of pharmaceutical compounds by the appropriate choice of solvent via an optimization model.A three-stage approach involving a pre-design stage,a product design stage and a post-design experimental verification stage is presented.The pre-design stage addresses the formulation of the property constraint for crystal morphology.This involves crystallization experiments and development of property models and constraints for morphology.In the design stage various property requirements for the solvent along with crystal morphology are considered and the product design problem is formulated as a mixed integer nonlinear programming model.The design stage provides an optimal solvent/list of candidate solvents. Similar to the pre-design stage,in the post design experimental verification stage,the morphology of the crystals (precipitated from the designed solvent)is verified through crystallization experiments followed by product characterization via scanning electron microscopy,powder X-ray diffraction imaging and Fourier transform spectra analysis.

Key words: morphology, solvent selection, nonlinear programming, crystallization, product design

摘要: In this paper we present a strategy for tuning the crystal morphology of pharmaceutical compounds by the appropriate choice of solvent via an optimization model.A three-stage approach involving a pre-design stage,a product design stage and a post-design experimental verification stage is presented.The pre-design stage addresses the formulation of the property constraint for crystal morphology.This involves crystallization experiments and development of property models and constraints for morphology.In the design stage various property requirements for the solvent along with crystal morphology are considered and the product design problem is formulated as a mixed integer nonlinear programming model.The design stage provides an optimal solvent/list of candidate solvents. Similar to the pre-design stage,in the post design experimental verification stage,the morphology of the crystals (precipitated from the designed solvent)is verified through crystallization experiments followed by product characterization via scanning electron microscopy,powder X-ray diffraction imaging and Fourier transform spectra analysis.

关键词: morphology, solvent selection, nonlinear programming, crystallization, product design