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Solvent recovery opportunities in the pharmaceutical industry
1Massachusetts Institute of Technology, Department of Chemical Engineering, Cambridge, MA 02139, USA. pib@mit.edu
Abstract:
Opportunities for recovering and recycling waste solvent streams in the pharmaceutical industry are reviewed. A major obstacle to solvent recovery and recycling is the existence of azeotropic compositions, and thus separation barriers, in the mixtures in question. Advances in the understanding of these complex separation problems are discussed. Recent progress on novel designs for small-scale, flexible azeotropic separation processes is reviewed. Also considered is the alternative and complementary approach of integrating solvent use within a batch process so that the formation of hard-to-separate azeotropic compositions is prevented.
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