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Experimental Evidence for Double Quaternary Azeotropy’s Existence
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Playlist
  • double azeotropy
  • phase diagram
  • vapor‒liquid equilibrium
  • quaternary system
  • singular points
  • azeotropy rule
Video Introduction

This video is adapted from 10.3390/e25070980

The phase equilibrium in an acetonitrile + water + cyclohexene + chloroform system was studied at 101.3 kPa. A prediction regarding the internal structure of the composition tetrahedron (presence/absence of one/two internal singular points) was made using thermodynamic modeling in AspenPlus V.10.0. The existence of two internal quaternary azeotropes (of node type with a minimum boiling point and of saddle type) was confirmed as a result of a full-scale experiment. Thermodynamic-topological analysis of the structure of phase equilibrium diagrams was carried out to confirm the correctness of the diagram construction.

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Frolkova, A.; Zhuchkov, V.; Frolkova, A. Experimental Evidence for Double Quaternary Azeotropy’s Existence. Encyclopedia. Available online: https://encyclopedia.pub/video/video_detail/1003 (accessed on 05 December 2025).
Frolkova A, Zhuchkov V, Frolkova A. Experimental Evidence for Double Quaternary Azeotropy’s Existence. Encyclopedia. Available at: https://encyclopedia.pub/video/video_detail/1003. Accessed December 05, 2025.
Frolkova, Anastasia, Valeriy Zhuchkov, Alla Frolkova. "Experimental Evidence for Double Quaternary Azeotropy’s Existence" Encyclopedia, https://encyclopedia.pub/video/video_detail/1003 (accessed December 05, 2025).
Frolkova, A., Zhuchkov, V., & Frolkova, A. (2023, November 27). Experimental Evidence for Double Quaternary Azeotropy’s Existence. In Encyclopedia. https://encyclopedia.pub/video/video_detail/1003
Frolkova, Anastasia, et al. "Experimental Evidence for Double Quaternary Azeotropy’s Existence." Encyclopedia. Web. 27 November, 2023.
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