The effects of operating parameters on stage efficiency in an Oldshue-Rushton column
In this research, stage efficiency has been measured in a 113 mm Oldshue-Rushton column for two systems including toluene-acetone-water and n-butyl acetate-acetone-water. The experiments performed in two directions of mass transfer. The effects of different parameters such as rotor speed,...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Association of the Chemical Engineers of Serbia
2016-01-01
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| Series: | Chemical Industry and Chemical Engineering Quarterly |
| Subjects: | |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/1451-9372/2016/1451-93721500022A.pdf |
| Summary: | In this research, stage efficiency has been measured in a 113 mm
Oldshue-Rushton column for two systems including toluene-acetone-water and
n-butyl acetate-acetone-water. The experiments performed in two directions of
mass transfer. The effects of different parameters such as rotor speed,
dispersed and continuous phase velocities and direction of mass transfer on
the stage efficiency were investigated. The experimental data show that the
stage efficiency is strongly dependent on the agitation rate and interfacial
tension, but only slightly dependent on phase velocities. It was observed
that the stage efficiency is better when the mass transfer direction of
acetone is from the continuous to the dispersed phase in comparison to
opposite direction due to the presence of oscillations created by surface
tension gradient. The investigated column is one of the extraction columns
with high stage efficiency. An empirical correlation is proposed to describe
the stage efficiency in terms of Reynolds and Froude numbers. The predictions
of the equation had good agreement with the experimental data. |
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| ISSN: | 1451-9372 2217-7434 |