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Synthesis of crystallization–distillation hybrid separation processes
Author(s) -
Berry David A.,
Ng Ka M.
Publication year - 1997
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690430712
Subject(s) - crystallization , relative volatility , distillation , ternary operation , eutectic system , separation process , binary number , process engineering , extractive distillation , materials science , thermodynamics , chemistry , chromatography , computer science , mathematics , organic chemistry , engineering , physics , arithmetic , alloy , programming language
A systematic method to synthesize crystallization–distillation hybrid separation processes is presented. Two classes of hybrids are identified for binary mixtures. The first bypasses azeotropes and tangent pinches, while the second bypasses eutectics. Guidelines for flow‐sheet selection are proposed based on an analysis of simple eutectic, constant relative volatility systems. In addition, the hybrids are compared to both extractive and adductive crystallization in order to determine the conditions under which solvent‐based crystallization techniques outperform the proposed hybrid configurations. The method is extended to ternary mixture. The use of stream combination and complex distillation columns is also considered.