Hydrodynamic and mass transfer performance of multiple upcomer extraction trays

Abstract

The multiple upcomer (Mu) extraction tray was specifically developed for aromatics extraction processes. Hydrodynamic and mass transfer experiments have been carried out w i t h n-butanollsuccinic acidwater as an experimental system in a MU tray extraction column of 0.1 m diameter. The dispersed phase hold-up, drop s u e and overall efticiency were measured and the hydrodynamic and mass transfer parameters were correlated. The flooding velocities and the overall efficiency predicted from the correlation for this column agreed well with the experimental data.

Drop behaviour characteristics in different operating regimes in an L‐shaped pulsed sieve‐plate column

“…On the other hand, when there is mass transfer from the continuous phase to the dispersed phase, smaller drops are produced in comparison to the same condition without mass transfer. In fact, because of the consequent interfacial tension gradient, the interface movement of the drop and the inner circulation generated into the drop gain the same direction . Therefore, this mass transfer path leads to increase on the interface deformations, consequent deformation of drops, and higher drop breakage.…”

“…In fact, because of the consequent interfacial tension gradient, the interface movement of the drop and the inner circulation generated into the drop gain the same direction. [44][45][46] Therefore, this mass transfer path leads to increase on the interface deformations, consequent deformation of drops, and higher drop breakage.…”

Liquid–Liquid Extraction of Yttrium(III) Using 2-Ethylhexyl Phosphonic Acid Mono-2-ethylhexyl (EHEHPA) in a Microreactor: A Comparative Study

“…In general, the specific interfacial area could be greater than 1000 m 2 /m 3 when the size of the droplet is smaller than 1 mm, which is significantly larger than that of extraction column. 7,8 With the advancement in microchemical technology, it is convenient to design and fabricate on a commercial basis. Associated enterprises can easily make different sizes of microreactors in silicon, glass, polydimethylsiloxane (PDMS), poly(methyl methacrylate) (PMMA), or other materials by the methods of photolithography, etching, and machining.…”

“…This notably gains the attention of laboratories and chemical engineering industries on account of several unique inherent properties, including metallurgy, functional materials, fine chemicals, and biology applications. − In view of a series of problems in conventional extraction equipment, interest in microchemical engineering is mainly concentrated on the abilities of enhanced mass- and heat-transfer performances due to the high specific interfacial area. In general, the specific interfacial area could be greater than 1000 m 2 /m 3 when the size of the droplet is smaller than 1 mm, which is significantly larger than that of extraction column. , With the advancement in microchemical technology, it is convenient to design and fabricate on a commercial basis. Associated enterprises can easily make different sizes of microreactors in silicon, glass, polydimethylsiloxane (PDMS), poly­(methyl methacrylate) (PMMA), or other materials by the methods of photolithography, etching, and machining .…”