### Abstract

Liquid-liquid miscibility in binary and ternary fluids has been studied to a great extent by Professor Schneider. One of the important results of his studies was the description of the so-called immiscibility holes or islands in type IV systems. In these holes, the liquid-liquid coexistence curve virtually disappears; i.e., it goes below the vapor pressure of the mixture where the liquid becomes metastable to the liquid-vapor phase transition. In the case of the ternary system, the critical end-points then form a closed loop which is the so-called immiscibility hole. Changing, for example, the composition in ternary systems or the molar mass in binary systems containing chain molecules, one can show that a type III-like liquid-liquid critical curve can emerge from this hole. Here we show that this type III-like critical curve already exists within the hole. As a consequence, the liquid-liquid critical curves of type III and IV systems are similar if metastable states are included. The possibility of indirect estimation of the critical point loci hidden in the negative pressure domain using pressure evolution of the conductivity is shown. It is supported by the distortion sensitive and derivative based analysis of data, yielding optimal values for the parameters.

Original language | English |
---|---|

Pages (from-to) | 1569-1574 |

Number of pages | 6 |

Journal | Journal of Chemical and Engineering Data |

Volume | 54 |

Issue number | 5 |

DOIs | |

Publication status | Published - May 14 2009 |

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### ASJC Scopus subject areas

- Chemistry(all)
- Chemical Engineering(all)

### Cite this

*Journal of Chemical and Engineering Data*,

*54*(5), 1569-1574. https://doi.org/10.1021/je800910f

**Miscibility holes and continuous liquid-liquid miscibility curves in type III and IV systems.** / Kraska, Thomas; Imre, A.; Rzoska, Sylwester J.

Research output: Contribution to journal › Article

*Journal of Chemical and Engineering Data*, vol. 54, no. 5, pp. 1569-1574. https://doi.org/10.1021/je800910f

}

TY - JOUR

T1 - Miscibility holes and continuous liquid-liquid miscibility curves in type III and IV systems

AU - Kraska, Thomas

AU - Imre, A.

AU - Rzoska, Sylwester J.

PY - 2009/5/14

Y1 - 2009/5/14

N2 - Liquid-liquid miscibility in binary and ternary fluids has been studied to a great extent by Professor Schneider. One of the important results of his studies was the description of the so-called immiscibility holes or islands in type IV systems. In these holes, the liquid-liquid coexistence curve virtually disappears; i.e., it goes below the vapor pressure of the mixture where the liquid becomes metastable to the liquid-vapor phase transition. In the case of the ternary system, the critical end-points then form a closed loop which is the so-called immiscibility hole. Changing, for example, the composition in ternary systems or the molar mass in binary systems containing chain molecules, one can show that a type III-like liquid-liquid critical curve can emerge from this hole. Here we show that this type III-like critical curve already exists within the hole. As a consequence, the liquid-liquid critical curves of type III and IV systems are similar if metastable states are included. The possibility of indirect estimation of the critical point loci hidden in the negative pressure domain using pressure evolution of the conductivity is shown. It is supported by the distortion sensitive and derivative based analysis of data, yielding optimal values for the parameters.

AB - Liquid-liquid miscibility in binary and ternary fluids has been studied to a great extent by Professor Schneider. One of the important results of his studies was the description of the so-called immiscibility holes or islands in type IV systems. In these holes, the liquid-liquid coexistence curve virtually disappears; i.e., it goes below the vapor pressure of the mixture where the liquid becomes metastable to the liquid-vapor phase transition. In the case of the ternary system, the critical end-points then form a closed loop which is the so-called immiscibility hole. Changing, for example, the composition in ternary systems or the molar mass in binary systems containing chain molecules, one can show that a type III-like liquid-liquid critical curve can emerge from this hole. Here we show that this type III-like critical curve already exists within the hole. As a consequence, the liquid-liquid critical curves of type III and IV systems are similar if metastable states are included. The possibility of indirect estimation of the critical point loci hidden in the negative pressure domain using pressure evolution of the conductivity is shown. It is supported by the distortion sensitive and derivative based analysis of data, yielding optimal values for the parameters.

UR - http://www.scopus.com/inward/record.url?scp=67749142122&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=67749142122&partnerID=8YFLogxK

U2 - 10.1021/je800910f

DO - 10.1021/je800910f

M3 - Article

AN - SCOPUS:67749142122

VL - 54

SP - 1569

EP - 1574

JO - Journal of Chemical & Engineering Data

JF - Journal of Chemical & Engineering Data

SN - 0021-9568

IS - 5

ER -