Volume 48, Issue 7 e70068
Research Article

Perfluoro(butylcyclohexane)–Cis-Perfluorodecalin Mixture Separation by Heteroazeotropic Distillation

Dr. Egor V. Lupachev

Corresponding Author

Dr. Egor V. Lupachev

Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, Laboratory of Theoretical Foundations of Chemical Technology, Leninsky prosp., 31, Moscow, 119071 Russia

E-mail: [email protected]

Search for more papers by this author
Alexey V. Kisel

Alexey V. Kisel

Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, Laboratory of Theoretical Foundations of Chemical Technology, Leninsky prosp., 31, Moscow, 119071 Russia

Search for more papers by this author
Sergey. Ya. Kvashnin

Sergey. Ya. Kvashnin

Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, Laboratory of Theoretical Foundations of Chemical Technology, Leninsky prosp., 31, Moscow, 119071 Russia

Search for more papers by this author
Dr. Viktor I. Privalov

Dr. Viktor I. Privalov

Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, Laboratory of Chemistry of Coordination Polynuclear Compounds, Leninsky prosp., 31, Moscow, 119071 Russia

Search for more papers by this author
Tatiana D. Ksenofontova

Tatiana D. Ksenofontova

Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, The Research Equipment Sharing Center of Physical Methods for Studying Substances and Materials, Leninsky prosp., 31, Moscow, 119071 Russia

Search for more papers by this author
Dr. Andrei V. Polkovnichenko

Dr. Andrei V. Polkovnichenko

Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, Laboratory of Theoretical Foundations of Chemical Technology, Leninsky prosp., 31, Moscow, 119071 Russia

Search for more papers by this author
First published: 30 June 2025

Abstract

This work investigates the process of distillation purification of perfluoro(butylcyclohexane) (BCH) and concentration of perfluorodecalin (PFD) from industrial samples of BCH–PFD mixtures. According to experimental data, the main difficulty is the separation of BCH from the cis-isomer of PFD, for which distillation is ineffective. To intensify this process, a heteroazeotropic distillation method in the presence of water was proposed and implemented on a pilot-scale distillation column. This approach allows BCH to be purified from PFD up to more than 0.99 mol.fr. The advantage of the proposed method is the use of a safe separating agent—water, which is especially important due to the widespread use of BCH and PFD in medicine. Based on experimental data, the work also determined the characteristics of heteroazeotropes in the systems BCH–water, cis-PFD–water, and trans-PFD–water and relative volatility between BCH and cis-PFD in the presence of water.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.