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2 edition of Study of coalescence phenomena in a mixer-settler. found in the catalog.

Study of coalescence phenomena in a mixer-settler.

S-Zahoor-ul-Hassan- Rizvi

Study of coalescence phenomena in a mixer-settler.

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Published in Bradford .
Written in English


Edition Notes

M.Eng. dissertation. Typescript.

SeriesDissertations
ID Numbers
Open LibraryOL13788596M


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Study of coalescence phenomena in a mixer-settler. by S-Zahoor-ul-Hassan- Rizvi Download PDF EPUB FB2

The experiments were performed in the batch pilot installation presented schemati- cally in Fig. The mixer-settler A was filled with the organic phase. The aqueous solutions used in the different stages were fed from the reservoirs Tl-T4 into the mixer-settler by means of the pumps p by: 5.

A new type of mixer-settler unit, where coalescence is promoted using the phase inversion method, has been developed. Using alkaline etching solution and LIX 54 as extractant, the influence of the intensity of mixing, the total flow rate and the hydrodynamic conditions in the nozzles of the scattering device on the extraction and separation efficiencies was by: 5.

The behavior of the dispersion band in the settler of a pilot scale mixer-settler unit is analyzed. Drop to drop and drop to interface coalescence are studied by image analysis of digital video.

coalescence for entrainment reduction in a static-mixer settler setup for a caprolactam-toluene-water and an ethylbenzene (EB)-a-methyl benzyl alcohol (MBA)-water systems.

The mixing of the organic and aqueous phase was done in a static-mixer and an AC DC electric eld was applied directly at the end of the static-mixer.

mixer-settler, incorporating up to 16 separate stages, is still widely used for handling high flow ratios. 09185 9 One reason is that mixer-settlers can be operated at high efficiencies, more or less regardless of the properties of the phases.

Scale-up on a semi empirical basis is often. The comparison of classic continuous mixer-settler (MS) in the gravitational eld (left) and the centrifugal eld is and even less for coalescence phenomena are given in literature (Jammoal and Lee, ; Otillinger, ).

operational modes is identied. Therefore, a detailed study on the ow. This paper investigates the application of electric field enhanced coalescence for entrainment reduction in a static-mixer settler setup for a caprolactam-toluene-water and an ethylbenzene (EB)-α.

Mixer settlers are a class of mineral process equipment used in the solvent extraction process. A mixer settler consists of a first stage that mixes the phases together followed by a quiescent settling stage that allows the phases to separate by gravity.

The mixer-settler used in this work is single stage horizontal and contains 2 four-blade impellers. Impeller speed was controlled digitally and the flow rates of pumps were variable. The mixer-settler was made of glass and the flows were co-current.

Fig. 1 shows a schematic diagram of the experimental set up. The mixer-settler geometry is tabulated. The model we are using for the shallow-layer settler, in a mixer-settler system, is able to describe the hydrodynamic phenomena of the transient state of a liquidliquid system.

Its mathematical model includes parameters of the drop transport process as well as of the dropdrop and drop-interface coalescence with the active interface. This study aims to increase the process understanding by developing a CFD flash furnace settler model of an industrial flash furnace.

Thereby, the CFD model accounts for bath level changes, polydispersity, and coalescence of matte. Coalescence is modeled by an own empirical model focusing on gravitational coalescence.