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Combined model of mass-transfer coefficients for clean and contaminated liquid-liquid systems

Haghdoost, A ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1021/ie901076f
  3. Abstract:
  4. Mass-transfer rates to and from drops in liquid-liquid extraction processes are often reduced by the presence of contaminants. To design an industrial extractor, it is essential to consider this contamination effect in a quantitative manner. To achieve this goal, an experimental investigation was conducted on the mass transfer into single drops for n-butanol-succinic acid-water, as the recommended test system by the European Federation of Chemical Engineering (EFCE). The effects of anionic (sodium dodecyl sulfate, SDS), cationic (dodecyl trimethyl ammonium chloride, DTMAC), and nonionic (octylphenol decaethylene glycol ether, Triton X-100) surfactants on the hydrodynamic and mass-transfer parameters such as mean drop size, average velocity, and the overall mass-transfer coefficient were thoroughly investigated. On the basis of experimental results, a model for surfactant effect on the mass-transfer coefficient in a system with unknown type and amount of contaminant was presented. This model is especially applicable in industrial processes in which contaminants have unknown sources and types
  5. Keywords:
  6. Ammonium chloride ; Average velocity ; Combined model ; Drop size ; European federation of chemical engineerings ; Experimental investigations ; Glycol ethers ; Industrial processs ; Liquid-liquid extraction process ; Liquid-liquid systems ; Mass transfer rate ; Mass-transfer coefficient ; N-butanol ; Nonionic ; Octylphenols ; Single drops ; Sodium dodecyl sulfate ; Succinic acids ; Surfactant effects ; Test systems ; Transfer parameters ; Trimethyl ; Triton X-100 ; Ammonium compounds ; Anionic surfactants ; Cationic surfactants ; Chlorine compounds ; Contamination ; Drops ; Ethers ; Glycols ; Impurities ; Mass transfer ; Nonionic surfactants ; Sodium sulfate ; Solvent extraction ; Liquids
  7. Source: Industrial and Engineering Chemistry Research ; Volume 50, Issue 8 , 2011 , Pages 4608-4617 ; 08885885 (ISSN)
  8. URL: http://pubs.acs.org/doi/abs/10.1021/ie901076f