Showing papers by "Daniel Tondeur published in 1982"
TL;DR: In this article, the authors examined the chromatographic separation of two solutes interacting nonlinearly with the sorbent, when only partial separation is achieved at the column outlet, and an intermediate cut of the effluent is recycled.
49 citations
TL;DR: In this paper, a new process for purification of phenolic wastewaters by parametric pumping is presented and an equilibrium (linear) model for nonmixed dead volumes thermal direct mode PPP is developed and the influence of bottom and top dead volume magnitudes on transient separation is analyzed.
Abstract: A new process for purification of phenolic wastewaters by parametric pumping is presented.
An equilibrium (linear) model for nonmixed dead volumes thermal direct mode parametric pumping is developed and the influence of bottom and top dead volume magnitudes on transient separation is analyzed.
Analytical solutions for batch, continuous and semicontinuous operations are presented.
Experimental data on the system phenol/water-Duolite ES861 include equilibrium isotherms at 20°C and 60°C and parapump runs for the cases mentioned above.
21 citations
TL;DR: In this paper, a staged contacting device adapted from Craig's countercurrent extractor has been designed to allow back and forth stepwise displacement of the light liquid phase while the heavy liquid phase remains stationary.
Abstract: A staged contacting device adapted from Craig's countercurrent extractor has been designed to allow back and forth stepwise displacement of the light liquid phase while the heavy liquid phase remains stationary. Thermal parametric pumping experiments were run in this staged apparatus, at total reflux, with water as the heavy, stationary phase, toluene as the light moving phase, and phenol as the solute distributed linearly between the two phases. The transient and steady regimes of this operation are investigated by introducing a matrix formalism and studying the properties of eigenvalues and eigenvectors. It is shown how this formalism can be extended to more complex situations involving nonideal separations and transfer of phases, several transfers per half-cycle, and partial reflux.
2 citations