| dc.contributor.author | Wichterlová, Jana | |
| dc.contributor.author | Rod, V. | |
| dc.date.accessioned | 2007-08-03T13:05:47Z | |
| dc.date.available | 2007-08-03T13:05:47Z | |
| dc.date.issued | 1999 | |
| dc.identifier.citation | Chemical Engineering Science. 1999, vol. 54, issue 18, p. 4041-4051. | en |
| dc.identifier.issn | 0009-2509 | |
| dc.identifier.uri | http://hdl.handle.net/10084/61457 | |
| dc.language.iso | en | en |
| dc.publisher | Pergamon | en |
| dc.relation.ispartofseries | Chemical Engineering Science | en |
| dc.relation.uri | http://dx.doi.org/10.1016/S0009-2509(99)00119-0 | en |
| dc.subject | unsteady-state extraction | en |
| dc.subject | multicomponent separation | en |
| dc.subject | efficiency | en |
| dc.subject | mixer–settler | en |
| dc.subject | rare earths | en |
| dc.title | Dynamic behaviour of the mixer–settler cascade. Extractive separation of the rare earths | en |
| dc.type | article | en |
| dc.identifier.location | Není ve fondu ÚK | en |
| dc.description.abstract-en | Dynamic modelling of a countercurrent multistage process is important not only for solving start-up and control problems but also for its possible use for performance analysis, specifically in a multicomponent non-linear extraction process. However, the respective differential equations are often stiff, complicated by non-linear equilibrium relations, and their numerical solution is very difficult. The problem is overcome by the proposed pulsed-flow model. In the model, each extraction stage is considered as a set of ideal mixers and the continuous process is represented by repeated sequences of pulsed flow and a batch mass transfer. Moreover, it is possible to introduce extraction efficiency into the pulsed-flow model. A typical example of the process with the above features is the extractive separation of the rare earth elements in a mixer–settler cascade. Adequacy of the pulsed-flow model was tested and its parameters were determined by dynamic experiments on a 6-stage cascade. The pulsed-flow model proved to be very useful for finding the steady-state operating conditions ensuring the required product purity in the rare earths separation using bis(2-ethylhexyl)phosphoric acid (DEHPA) in a 30-stage extraction–stripping cascade with extract and raffinate refluxes. The model was also used for the prediction of responses to some disturbances and for the analysis of control configurations. | en |
| dc.identifier.doi | 10.1016/S0009-2509(99)00119-0 | |
| dc.identifier.wos | 000081450300008 | |