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Indian Journal of Chemical Technology (IJCT) >
IJCT Vol.17 [2010] >
IJCT Vol.17(2) [March 2010] >
| Title: | Study of bulk liquid membrane as a separation technique to recover acetic and propionic acids from dilute solutions |
| Authors: | Kaur, A
Vohra, D K |
| Keywords: | Bulk liquid membrane
Reactive extraction
Recovery of propionic acid
Acetic acid
TOA |
| Issue Date: | Mar-2010 |
| Publisher: | CSIR |
| Abstract: | Liquid membranes
incorporating potential chemical species can perform rapid and selective
transport of a variety of guest species and that too being much energy
efficient than other separation methods. Separation characteristics of a bulk
liquid membrane were investigated to recover acetic acid and propionic acid
from dilute aqueous solutions by reactive extraction process. The liquid
membrane made up of trioctylamine as an extractant and toluene as an organic
diluent was tested. The membrane was kept in contact with two aqueous phases
namely acidic feed phase and alkaline strip phase. The parameters affecting the
extraction of the acid including nature of the feed phase, sodium hydroxide
concentration in the strip phase and concentration of trioctylamine in membrane
phase were investigated. The membrane system was observed to have potential to
extract both the acids which was confirmed with the increase in the percentage
extraction and the mass-transfer coefficient with time. The set-up under
investigation could extract about 40% of the acid in first five hours of
operation under defined conditions. The set-up was found to be more favourable
for propionic acid in comparison to acetic acid as the difference in extraction
efficiency widens with the increase in the strength of the strip phase
solution. |
| Page(s): | 133-138 |
| ISSN: | 0975-0991 (Online); 0971-457X (Print) |
| Source: | IJCT Vol.17(2) [March 2010]
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