Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/27334
Título: | Effect of viscosity of a liquid membrane containing oleyl alcohol on the pertraction of butyric acid |
Autor(es): | Blahušiak, M. Marták, J. Miranda, Fernando Schlosser, Š. Teixeira, J. A. |
Palavras-chave: | Pertraction Extraction Butyric acid Oeyl alcohol Dodecane Supported liquid membrane Vscosity effect oleyl alcohol viscosity effect |
Data: | 2013 |
Editora: | Versita |
Revista: | Chemical Papers |
Resumo(s): | Solvent formulation is important in the optimization of the mass-transfer through supported liquid membranes (SLM) in pertraction and membrane extraction. Oleyl alcohol (OA) is frequently used as the solvent or diluent in the extraction of carboxylic acids. A disadvantage of OA is its relatively high viscosity of 28.32 mPa s at 25°C. This can be decreased by the application of a less viscous OA diluent, e.g. dodecane. The relationship between the ratio of the distribution coefficient of butyric acid (BA), D F, and the viscosity of OA-dodecane solvents, µ, as extraction and transport characteristics, and the overall mass-transfer coefficient, K p, through SLMs was analyzed. Dependence of the D F/µ ratio on the OA concentration showed a maximum at the OA concentration of 15 mass % to 30 mass %. The OA concentration dependence of K p for SLMs exhibited also a maximum at about 30 mass % and 20 mass % of OA at the BA concentration driving force of 0.12 kmol m−3 and 0.3 kmol m−3, respectively. Shifting of the maximum in K p dependences towards lower OA concentrations by increasing the BA concentration driving force is in agreement with the D F/µ ratio dependence. Using pure OA as the solvent or diluent is not preferable and a mixture of a low viscosity diluent with the OA concentration below 40 mass % should be used. The presented results show the potential of the D F/µ ratio in the screening and formulation of solvents in extraction and SLM optimization. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/27334 |
DOI: | 10.2478/s11696-013-0370-4 |
ISSN: | 0366-6352 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series |