Recovery and separation of organic acids by membrane-based solvent extraction and pertraction

Schlosser, Štefan; Kertész, R.; Marták, Ján

doi:10.1016/j.seppur.2004.07.019

Cited by 144 publications

(70 citation statements)

References 239 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Indeed, porous supports used to avoid dispersion of phases have been demonstrated to have no effect on partition coefficients. 7 A recent development in liquid membranes is the insertion of a chiral carrier within the membrane phase, to favour the enantioselective transport of the analytes. [8][9][10][11] Since this discovery, membrane contactors became a very promising technology, easily transferable from laboratory to industrial scale, even though a further effort has to be focused on new selective carriers.…”

Section: Introductionmentioning

confidence: 99%

Enantioselective transport of D,L-phenylalanine and D,L-phenylglycine through a bulk liquid membrane containing cinchona alkaloid derivatives as chiral selectors

Canepari

Girelli

Mattei

et al. 2009

J. Braz. Chem. Soc.

View full text Add to dashboard Cite

Diversos derivados de Cinchona foram testados como carregadores quirais móveis, para o transporte enantiosseletivo de D,L-fenilglicina e D,L-fenilalanina, através de uma membrana líquida orgânica volumosa (MLV). Os efeitos de vários parâmetros, como natureza do carregador, concentrações do solvente na membrana, do tampão, do soluto e do carregador, no enriquecimento quiral da MLV, foram avaliados. Somente a D,L-fenilglicina foi sujeita, em certo grau, ao transporte enantiosseletivo; a razão máxima de enantiosseletividade (as taxas de transporte iniciais do enantiômero L relativo ao antípoda) foi obtida empregando brometo de O-alil-N-(9-antracenilmetil) cinchonidínio como carregador. Em todos os casos, a seletividade mais alta foi observada durante os estágios iniciais do processo, indicando a taxa de aminoácido liberada da fase fonte (FF) para a fase orgânica da membrana (FM), como fator dirigente. O enriquecimento quiral pareceu depender mais de fatores termodinâmicos do que dos cinéticos, uma vez que a formação do complexo foi observada na interface (FF)/FM), enquanto a decomposição do complexo foi evidenciada na interface (FR)/(FM), onde FR é a fase receptora. O último fenômeno foi promovido pela presença de íons H + na FR. Different cinchona derivatives were tested as chiral mobile carriers for enantioselective transport of D,L-phenylglycine and D,L-phenylalanine through a bulk organic liquid membrane (BLM).The effects of several parameters such as carrier nature, membrane solvent, buffer, solute and carrier concentrations on BLM enrichment were evaluated. Only D,L-phenylglycine is subjected to enantioselective transport at a certain degree; the maximum enantioselectivity ratio (the initial transport rates of the L-enantiomer relative to the antipode) was reached by employing O-allyl-N-(9-anthracenylmethyl)cinchonidinium bromide as carrier. In all cases the highest selectivity was observed during the initial stages of the process, indicating the rate of amino acid release from the source phase (SP) to the membrane organic phase (MP) as the driving factor. Chiral enrichment appeared to depend on thermodynamic factors more than on kinetic ones, since the complex formation was observed at (SP)/MP) interface, while complex decomposition was evidenced at (RP)/(MP) interface, where RP is receiving phase. The last phenomenon was promoted by H + ions present in the RP.

show abstract

Section: Introductionmentioning

confidence: 99%

Enantioselective transport of D,L-phenylalanine and D,L-phenylglycine through a bulk liquid membrane containing cinchona alkaloid derivatives as chiral selectors

Canepari

Girelli

Mattei

et al. 2009

J. Braz. Chem. Soc.

View full text Add to dashboard Cite

show abstract

“…Extraction of Cu 2+ is carried out mostly with organophosphorus extractants such as di(2-ethylhexyl)phosphoric acid (D2EHPA) in hydrometallurgical and waste water treatment processes 14,15 . Conventional copper extraction processes are carried out using equipments such as packed towers, mixer-settlers, etc.…”

Section: Solvent Extraction Of Copper Using Hollow-fiber Membrane Conmentioning

confidence: 99%

“…At the first module, aqueous feed containing copper ions is contacted with the extractant phases. At the second modules so called membrane bases solvent stripping (MBSS), the extractant is recovered and recycled to the extraction module 14 .…”

Section: Solvent Extraction Of Copper Using Hollow-fiber Membrane Conmentioning

confidence: 99%

Theoretical Studies on Copper Extraction by means of Polymeric Membrane Contactors

Marjani¹,

Shirazian²

2012

Orientjchem.

View full text Add to dashboard Cite

“…Used at first to separate metal cations [1,2], more recent research is oriented towards using membrane techniques to transport and separation of organic compounds [3,4]. The main classes of organic compounds which are studied, in terms of transport and separation throught liquid membrane are: phenols and their derivates [5][6][7], organic amines [8], organic acids [9,10], amino acids [11][12][13], and a significant number of drugs such as penicillin G [14], dopamine [15] and others.…”

Section: Introductionmentioning

confidence: 99%

Transport and separation through bulk liquid membrane of some biologic active compounds

Zaharia¹,

Diaconu²,

Ruse³

et al. 2012

Analele Universitatii "Ovidius" Constanta - Seria Chimie

View full text Add to dashboard Cite

Transport through liquid membranes of various chemical species is a viable method for different applications in analytical or technological domain. This paper presents the transport and separation results of two compounds of pharmaceutical importance: salicylic acid and aspirin, using bulk liquid membrane technique. We studied the effect of the feed source and receiving phase pH on the transport efficiency of the two compounds throught chloroform membrane. These results were correlated with speciation diagrams of salicylic acid and aspirin. The speciation diagrams shows that in these pH conditions, for aqueous phase of the membrane system, the two compounds are mostly undissociated form and therefore active for transport. In this system it can be achieve separation of the two compounds, salicylic acid and aspirin, using a suitable complexing agent in the feed source such as Fe 3+. In this way salicylic acid forms an inactive complex structure for transport while aspirin crosses the membrane and it is recovered in a percentage of 80% in the receiving phase membrane system.

show abstract

Recovery and separation of organic acids by membrane-based solvent extraction and pertraction

Cited by 144 publications

References 239 publications

Enantioselective transport of D,L-phenylalanine and D,L-phenylglycine through a bulk liquid membrane containing cinchona alkaloid derivatives as chiral selectors

Enantioselective transport of D,L-phenylalanine and D,L-phenylglycine through a bulk liquid membrane containing cinchona alkaloid derivatives as chiral selectors

Theoretical Studies on Copper Extraction by means of Polymeric Membrane Contactors

Transport and separation through bulk liquid membrane of some biologic active compounds

Contact Info

Product

Resources

About