Kinetic study of the effect of carrier and stripping agent concentrations on the facilitated transport of cobalt through bulk liquid membranes

León, Gerardo; Guzmán, María Amelia

doi:10.1016/j.desal.2005.03.067

Cited by 44 publications

(13 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Liquid membranes have shown great potential, especially in cases where solute concentrations are relatively low and other techniques cannot be applied efficiently, since they combine the processes of extraction and stripping in a single unit operation. The extraction chemistry is basically the same as that found in solvent extraction, but the transport is governed by kinetic rather than equilibrium parameters, that is, it is governed by a nonequilibrium mass transfer [16].…”

Section: Introductionmentioning

confidence: 99%

Separation and concentration of cobalt from zinc plant acidic thiocyanate leach solutions containing cobalt and nickel by an emulsion liquid membrane using triisooctylamine as carrier

Kumbasar

2009

Journal of Membrane Science

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Separation and concentration of cobalt from zinc plant acidic thiocyanate leach solutions containing cobalt and nickel by an emulsion liquid membrane using triisooctylamine as carrier

Kumbasar

2009

Journal of Membrane Science

View full text Add to dashboard Cite

“…[1][2][3] Extractive separation of liquid membrane, a new type of extractive separation technology, 4 originated in the 1960´s is widely used in chiral separation process 5,6 due to their cost effectiveness, low energy demand, set-up simplicity and the possibility to be used in continuous mode. Bulk liquid membrane (BLM) is one of the types of liquid membranes.…”

Section: Introductionmentioning

confidence: 99%

Extractive Resolution of racemic mandelic acid through a bulk liquid membrane containing binary chiral carrier

Yang¹,

Chen²,

Jiao³

2009

J. Braz. Chem. Soc.

View full text Add to dashboard Cite

Um método empregando "bulk liquid membrane" (BLM) e o complexo ácido di(2-etilhexil) fosfórico (D2EHPA) e ácido O,O'-dibenzoil-(2R, 3R)-tartárico (L-(-)-DBTA) foi desenvolvido para a separação por extração do ácido mandélico racêmico (rac MA). Os efeitos de tempo de resolução, concentração de D2EHPA na fase orgânica, concentração de rac MA na fase doadora, velocidade de agitação e temperatura sobre a separação por extração foram estudados. Os resultados experimentais evidenciaram que o maior fator de separação (α) 2,74 e o valor do excesso enantiomérico (ee, %) 46,47% foram obtidos quando o tempo de resolução foi de aproximadamente 4 h, a razão de concentração molar de rac MA, D2EHPA e L-(-)-DBTA foi 0,05:0,2:0,3, a velocidade de agitação, 400 r min -1 e a temperatura, 35 °C. O método desenvolvido é útil para a otimização do transporte de sistemas BLM e para a produção em grande escala de enantiômero puro. A method of bulk liquid membrane (BLM) using complex of di(2-ethylhexyl) phosphoric acid (D2EHPA) and O,O'-dibenzoyl-(2R, 3R)-tartaric acid (L-(-)-DBTA) was developed forthe extractive resolution of racemic mandelic acid (rac MA). The effects of resolution time, concentration of D2EHPA in the organic phase, concentration of rac MA in the feed phase, stirring speed and temperature on extractive resolution were studied. The experimental results have shown that the greatest separation factor (α) 2.74 and the enantiomeric excess value (ee, %) 46.47% were obtained when the resolution time was about 4 h, the molar concentration ratio of rac MA, D2EHPA and L-(-)-DBTA 0.05:0.2:0.3, the stirring speed 400 r min -1 and the temperature 35 °C. The developed method is helpful for optimizing the transport of BLM systems and for large-scale production of pure enantiomer.Keywords: D2EHPA, L-(-)-DBTA, bulk liquid membrane, extraction resolution, mandelic acid IntroductionThe production of single-enantiomer drugs is one of the hot-topics in the world. 1-3 Extractive separation of liquid membrane, a new type of extractive separation technology, 4 originated in the 1960´s is widely used in chiral separation process 5,6 due to their cost effectiveness, low energy demand, set-up simplicity and the possibility to be used in continuous mode. Bulk liquid membrane (BLM) is one of the types of liquid membranes. In a BLM, a relatively thick layer of immiscible fluid is used to separate the feed and strip phases. There is no means of support for the membrane phase and it is kept apart from the external phases only by means of its immiscibility. A recent development of chiral resolution in bulk liquid membranes is the incorporation of single enantioselective carrier within the liquid membrane phase, chemically facilitating the transport of a specific compound across the membrane. [7][8][9][10][11] However, the enantioselectivity of the single carrier is somehow low, therefore the use of binary chiral carrier was introduced while looking for new unitary chiral carrier with high separation capacity and large separation scale. Binary chiral c...

show abstract

“…Liquid membranes have shown great potential, especially in cases where solute concentrations are relatively low and other techniques cannot be applied efficiently, since they combine the processes of extraction and stripping in a single unit operation [21]. The extrac- tion chemistry is basically the same as that found in liquid-liquid extraction, but the transport is governed by kinetic rather than equilibrium parameters, that is, it is governed by a nonequilibrium mass transfer [3].…”

Section: Introductionmentioning

confidence: 99%

“…Cobalt is one of the heavy metals and exists in the vast majority of industrial effluents and waste waters, such as mining effluents, etching or pickling baths, dilute leaching solutions generated during hydrometallurgy, electroplating rinse liquors, etc. [3]. Several methods has been described for cobalt removal from wastewater during last years, including chemical precipitation [4], adsorption on activated carbon [5,6], biosorption by algae [7] ion exchange [8][9][10][11], pressure driven membrane processes [12] and combined methods (sorption or complexation plus pressure driven membranes processes) [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Separation and concentration of cobalt from ammoniacal solutions containing cobalt and nickel by emulsion liquid membranes using 5,7-dibromo-8-hydroxyquinoline (DBHQ)

Kumbasar

Şahin

2008

Journal of Membrane Science

View full text Add to dashboard Cite

Kinetic study of the effect of carrier and stripping agent concentrations on the facilitated transport of cobalt through bulk liquid membranes

Cited by 44 publications

References 27 publications

Separation and concentration of cobalt from zinc plant acidic thiocyanate leach solutions containing cobalt and nickel by an emulsion liquid membrane using triisooctylamine as carrier

Separation and concentration of cobalt from zinc plant acidic thiocyanate leach solutions containing cobalt and nickel by an emulsion liquid membrane using triisooctylamine as carrier

Extractive Resolution of racemic mandelic acid through a bulk liquid membrane containing binary chiral carrier

Separation and concentration of cobalt from ammoniacal solutions containing cobalt and nickel by emulsion liquid membranes using 5,7-dibromo-8-hydroxyquinoline (DBHQ)

Contact Info

Product

Resources

About