Best products of homogeneous azeotropic distillations

Heterogeneous extractive batch distillation of chloroform–methanol–water: Feasibility and experiments

“…Non ideal mixtures separation overall performance heavily relies on the choice of a suitable entrainer E. This issue has been frequently considered for a non ideal binary mixture A-B separation under continuous operation (Berg, 1969;Doherty and Caldarola, 1985;Laroche et al, 1991Laroche et al, , 1992Pöllmann and Blass, 1994;Perry et al, 1997) or under batch operation (Lang et al, 1994;Safrit et al, 1995;Lelkes, 1998;Rodriguez-Donis et al, 2001a,b, 2003aSkouras et al, 2005;Gerbaud et al, 2006;Kotai et al, 2007). Apart from being market available, inexpensive, stable, non toxic, non-flammable or non corrosive, the most awaited feature of the entrainer E is selectivity, through preferential interaction with either A or B.…”

“…B) (Laroche et al, 1991). The residue curve inflection point line behaves similarly to the univolatility line to assess the entrainer selectivity (Laroche et al, 1991;Pöllmann and Blass, 1994;Kiva et al, 2003). Based on the analysis of operating continuous extractive distillation processes, Knapp and Doherty (1994) have suggested a heuristic to set the optimal entrainer flowrate value at 2.0 to 4.0 the minimum entrainer flowrate value so as to get a minimum separation cost.…”

Analysis of closed multivessel batch distillation of ternary azeotropic mixtures using elementary VLE cells

“…Total reflux distillation column profiles at steady state coincide exactly with distillation lines as defined by Zharov (1968) and Zharov (1969) and Stichlmair (1988) for equilibrium staged columns. Simple distillation residue curves coincide exactly with total reflux packed distillation column profiles when all resistance to mass transfer is in the vapor phase (Serafimov et al 1973, Pöllmann andBlass 1994). This make distillation line and residue curve maps as representations of the mixture's VLE particularly suited to identify feasible products at the limiting operating condition of total reflux.…”

Conceptual Design of Azeotropic Distillation Processes

“…For a feasible reversible distillation, the products have to be connected by a continuous path constituted of the product pinch lines and intersecting in the feed concentration [50].…”