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  • Chemical Engineering  (1)
  • plait points  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Ternary liquid diffusion coefficients near plait points (1985)
    Springer
    International journal of thermophysics 6 (1985), S. 631-642 
    Details
    ISSN: 1572-9567
    Keywords: critical exponents ; diffusion coefficients ; Gouy interferometry ; plait points ; ternary liquid systems
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Mutual diffusion coefficients were measured as a function of temperature above the 30°C plait point of the water + 2-propanol + cyclohexane system using a Gouy interferometer and a new temperature-jump procedure. The four independent diffusion coefficients were found to decrease rapidly along the constant plait-point line as the temperature approached the consolute or plait temperature. Effective critical exponents were found to be 0.55 for the individual diffusion coefficients and 1.31 for the determinant of the diffusion coefficient matrix. The measured diffusion coefficients satisfy all stability requirements, although cross diffusion coefficients were found to be as large as main diffusion coefficients and a negative value was obtained for the water main diffusion coefficient in the component representation utilized in this work.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00500335
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  • 2
    Electronic Resource
    Electronic Resource
    The mutual diffusion coefficient of methanol-n-hexane near the consolute point (1986)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 32 (1986), S. 1125-1131 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The composition and temperature dependence of the mutual diffusion coefficient near the liquid-liquid critical point of methanol-n-hexane mixtures has been determined by Gouy interferometry. The critical exponent was found to be 0.685. Constant-temperature extrapolation to zero diffusivity located the spinodal curve. Spinodal loci calculated from the NRTL model are inconsistent with the experimentally determined values.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690320709
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