Optimization of Emulsion Liquid Extraction System for Lactic Acid Recovery

The paper deals with the possibility of using two-stage electrodialysis for recovery of lactic acid from model solutions and from fermentation broth. In the first step lactate was concentrated with desalting electrodialysis using ion exchange membranes Ralex (Mega,Czech Republic). The highest final concentration of 111 g/l was reached in the concentrate, it means an increase more than 2.5-times in comparison with the initial concentration. At the most 2 g of lactate per litre remained in the feed. The second step was the electroconversion of sodium lactate to lactic acid by water-splitting electrodialysis with the bipolar membranes Neosepta (Tokuyama Corp.,Japan). The final lactic acid concentration of 157 g/l was reached in the diluate. Total required energy in both electrodialysis processes consisting of the energy consumption for lactate transfer and for its electroconversion to lactic acid was 142 Wh/mol. The fermentation broth was decolourised before electrodialysis experiments. The best decolourisation capacity was shown by granulated active charcoal filled in the column operated by a slow flow of broth.

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Studies on a new solid–liquid Cs separation using the ionic liquid extraction system in comparison with the conventional adsorption

Journal of Radioanalytical and Nuclear Chemistry ◽

10.1007/s10967-018-6267-5 ◽

2018 ◽

Vol 319 (1) ◽

pp. 387-392 ◽

Cited By ~ 1

Author(s):

Seungyeon Cho ◽

Jungweon Choi ◽

Sang-June Choi ◽

Wonzin Oh

Keyword(s):

Ionic Liquid ◽

Liquid Extraction ◽

Extraction System ◽

Solid Liquid

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Extraction Behavior of Rare Earths in Ion Liquid Extraction System Using 1-Butyl-3-Methyl-Imidazolium Hexafluorophosphate and Benzoyl Acetone

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.335-336.1428 ◽

2011 ◽

Vol 335-336 ◽

pp. 1428-1432 ◽

Cited By ~ 4

Author(s):

Zhong Wei Pan ◽

Chang Ma ◽

Ying Wu Zhang ◽

Yu Xia Huang ◽

Xing Lin Chen ◽

...

Keyword(s):

Ionic Liquid ◽

Rare Earth ◽

Rare Earths ◽

Liquid Extraction ◽

Rare Earth Ions ◽

Extraction System ◽

Tetraacetic Acid ◽

Extraction Percentage ◽

Extraction Solvent ◽

Extraction Behavior

The extraction behavior of five rare earth ions (RE3+) was investigated in ionic liquid (IL) extraction system using 1-butyl-3-methyl-imidazolium hexafluorophosphate ionic liquid ([Bmim]PF6) as extraction solvent and benzoyl acetone (HA) as extractant. The extraction percentage of RE3+ using [Bmim]PF6 was less than 8% without HA. When sufficient HA was included in IL phase, the extraction percentage of RE3+ could be higher than 98%. The extracted species in the RE3+-[Bmim]PF6-HA system was neutral REA3 and the recovery of RE3+ extracted into [Bmim]PF6 can be achieved using the mixture of hydrazine hydrate and ethylenediamine tetraacetic acid (EDTA) as stripping agent. [Bmim]PF6 can be recycled in the experiment.

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