Abstract
Previous and present studies demonstrate that the new thin-film extractor with the gravity settler have superior performance over other conventional devices. This is because the volume of the extractor and the settler are significantly reduced, on the average, by factors of 100 and 10, respectively, for a similar power input. Correlations for a water-iodine-kerosene liquid system developed in the past (Berman and Tamir, 2000) for the mass transfer and pressure drop were modified by incorporating the ratio R/Rr. This ratio takes into account the impact of the liquids on the walls of the reactor where R is the radius of the free film and Rr is the radius of the reactor. In addition, an equation was proposed, which demonstrates the dependence of the extraction efficiency on the operating parameters. The gravity settler combined with the thin-film extractor was tested thoroughly yielding two correlations for estimating its height, i.e. the fluidized-bed and dense-packed zones. In the present case the sedimentation zone is absent. A scale up procedure based on the model developed is proposed as well as a principle scheme of a pilot plant based on the new effective combination.
Original language | English |
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Pages (from-to) | 305-313 |
Number of pages | 9 |
Journal | Canadian Journal of Chemical Engineering |
Volume | 79 |
Issue number | 3 |
DOIs | |
State | Published - 1 Jan 2001 |
Keywords
- Extraction
- Gravity settler
- Thin-film extractor
ASJC Scopus subject areas
- General Chemical Engineering