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Thermal stability of the extraction system “TODGA in Isopar M with n-decanol” at above atmospheric pressure

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Abstract

The gas evolution dynamics has been studied during thermal oxidation of 0.15 and 0.2 mol L−1 solutions of N,N,N′,N’-tetra-n-octyldiglycolamide (TODGA) in Isopar M diluent with n-decanol depending on the concentration of nitric acid. The effect of irradiation of the system “TODGA in Isopar M with n-decanol” on the possibility of a thermal explosion has been determined. Weak exothermic effects were observed for non-irradiated and irradiated mixtures in the presence of 4 mol L−1 HNO3 at 170 °C. At a concentration of nitric acid in the aqueous phase of 8 mol L−1 or more, for non-irradiated and irradiated two-phase systems, the process passes into a thermal explosion mode.

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Acknowledgments

The authors are grateful to anonymous reviewers whose valuable comments helped to improve this article.

Funding

This work was financially supported by Russian Science Foundation (project 16-19-00191).

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  1. A.N. Frumkin Institute of Physical Chemistry and Electrochemistry of RAS (IPCE RAS), 31/4 Leninsky Prospect, Moscow, Russia, 119071

    Ivan Skvortsov, Anton Smirnov & Elena Belova

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  1. Ivan Skvortsov
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  2. Anton Smirnov
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Contributions

All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by I.V. Skvortsov, A.V. Smirnov and E.V. Belova. The first draft of the manuscript was written by I.V. Skvortsov and E.V. Belova, and all authors commented on previous versions of the manuscript. The manuscript was translated into English by A.V. Smirnov and edited and reviewed by A.V. Smirnov and E.V. Belova. All authors read and approved the final manuscript.

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Correspondence to Anton Smirnov.

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Skvortsov, I., Smirnov, A. & Belova, E. Thermal stability of the extraction system “TODGA in Isopar M with n-decanol” at above atmospheric pressure. J Therm Anal Calorim 146, 1221–1228 (2021). https://doi.org/10.1007/s10973-020-10082-6

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