ISSN:
0001-1541
Keywords:
Chemistry
;
Chemical Engineering
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
Extensive studies on dispersion-free solvent extraction have been carried out using modules made with either hydrophobic or hydrophilic microporous hollow-fiber membranes. Membrane and boundary layer resistances have been characterized for both kinds of hollow fiber using solvent extraction systems with a wide variation of distribution coefficients and interfacial tensions. It has been found that the Graetz solution for a constant wall concentration describes satisfactorily mass transfer on the lumen side of a hollow-fiber device. A correlation of the form NSh = [Dh(1 - φ)/L]NRe0.6NSc0.33 appears to provide a close fit to the shell-side mass transfer coefficient data. The perforamnce characteristics of dispersion-free extraction in hollow-fiber modules have been considered against those of commercial packed-bed extractors. A perspective has been provided on comparative utilities of hydrophobic or hydrophilic hollow fibers for a given solvent extraction problem.
Additional Material:
10 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/aic.690340202
