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New processes for recovery of acetic acid from waste water

Domenii publicaţii > Stiinte ingineresti + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: Gangadwala, J., Rãdulescu, G., Kienle, A., Steyer, F., Sundmacher, K.

Editorial: Springer Berlin/Heidelberg, Clean Technologies and Environmental Policy, Vol. 10, p.245-254, 2008.

Rezumat:

This paper addresses an industrially important problem of acetic acid recovery from a waste water stream via reactive distillation. The presence of a three-phase regime on the column stages due to a liquid liquid phase split between aqueous and organic phases is a typical characteristic of this process. A modern modeling approach is presented to detect the existence of potential phase splitting in this column. A good agreement of a phase splitting model with the literature data has been shown. A theoretical study for the recovery of acetic acid from its 30 wt.% aqueous solution by esterification with n-butanol is presented. Alternate column structures were investigated and two structures rendering theoretically close to 100% conversion of acetic acid were identified. The dynamic simulations were performed on proposed structures to see transient responses wrt. to common process disturbances.

Cuvinte cheie: Separare de faze, continuitate, distilare reactiva, modelare si simulare in regim dinamic, butyl acetat, esterificare, recuperarea acidului acetic // Phase splitting, homotopy continuation, reactive distillation, modeling and dynamic simulation, butyl acetate, esterification, acetic acid recovery

URL: http://dx.doi.org/10.1007/s10098-007-0101-z