Regeneration of levulinic acid from loaded-organic phase: equilibrium, kinetics and process economics

Eda, S, Kota, B, Thella, P, Bankupalli, S, Bhargava, S and Parthasarathy, R 2017, 'Regeneration of levulinic acid from loaded-organic phase: equilibrium, kinetics and process economics', Chemical Papers, vol. 71, no. 10, pp. 1939-1951.


Document type: Journal Article
Collection: Journal Articles

Title Regeneration of levulinic acid from loaded-organic phase: equilibrium, kinetics and process economics
Author(s) Eda, S
Kota, B
Thella, P
Bankupalli, S
Bhargava, S
Parthasarathy, R
Year 2017
Journal name Chemical Papers
Volume number 71
Issue number 10
Start page 1939
End page 1951
Total pages 13
Publisher Slovak Academy Of Science
Abstract Regeneration of carboxylic acids from the loaded- organic phase is an essential step to complete the reactive extraction process. A study on the regeneration of levulinic acid from loaded-organic phase (methyl isobutyl ketone + tri-n-octylamine +acid) was carried out using various techniques including NaOH, temperature swing, diluent swing, and tri-methylamine methods. Equilibrium data obtained show that among all the methods, the recovery of acid is the highest for the tri methylamine method when the molar ratio of tri-methylamine to levulinic acid concentrations is greater than 1. Kinetic studies performed for the tri-methylamine method showed that there are no changes in the specific rate of extraction with changes in stirrer speed rate and phase volume ratio (Vaq/ Vorg), and the overall order of reaction is 1.5. Based on the effects of stirrer speed and phase volume ratio on the specific rate of extraction, the reaction was concluded to occur in the fast regime. Also, about 80% of acid was recovered by the evaporation of tri-methylamine phase at 104-140 oC. A detailed economic evaluation for the recovery of levulinic acid using reactive extraction for a feed rate of 2 m3 h-1 shows that the payback period for recovering capital investment is 0.49 years.
Subject Membrane and Separation Technologies
Keyword(s) Diluent
Evaporation
regeneration
temperature
Tri-methylamine
DOI - identifier 10.1007/s11696-017-0188-6
Copyright notice © Institute of Chemistry, Slovak Academy of Science 2017
ISSN 0366-6352
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