Separation of neon isotopes by rectification over a packed column is examined. The separation coefficient of the isotope pair 20Ne–22Ne is close to unity due to their similar properties. Rectification columns with contact space ~ 20 m in height are required to obtain isotopic products of high purity. The separation was carried out in a compact column using several stages because of vertical limitations. The obtained fractions were collected in gas tanks, compressed, purified, and directed for further enrichment in the same column. The degree of 22Ne extraction was shown to increase if the concentration of it in the distillate was held to the minimum. Ne isotopes could be obtained in 99.99% purity in 5–8 consecutive separation stages depending on the operating regime. An industrial pilot plant was built. A method for estimating the column operating time to produce a given volume of isotopic product was proposed.
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References
V. L. Bondarenko, I. A. Arkharov, and Yu. M. Simonenko, “Development of technologies and equipment for extracting isotopes 20Ne and 22Ne from natural Ne,” Tekh. Gazy, No. 6, 12–18 (2006).
V. L. Bondarenko, Yu. M. Simonenko, O. V. D’yachenko, et al., “Obtaining stable Ne isotopes in the cascade rectification columns,” Tekh. Gazy, No. 5, 29–40 (2012).
V. L. Bondarenko, Y. A. Shevich, Y. M. Simonenko, and E. V. Matveev, “Separation of neon isotopes by stepwise fractionation at 28 K,” Chem. Pet. Eng., 51, No. 11–12, 749–754 (2016).
L. Bewilogua, P. Verges, and H. Vinzelberg, “Gewinnung der Isotope Ne22 und Ne20 sowie Anreicherung von Ne21 durch Gegenstromdestillation bei 28 K,” Isotopenpraxis, No. 9, 97–100 (1973).
V. L. Bondarenko, Y. M. Simonenko, O. V. Diachenko, and E. V. Matveyev, “Cascade units for neon isotope production by rectification,” Low Temp. Phys., 39, No. 5, 482–486 (2013).
V. L. Bondarenko and I. M. Symonenko, US Pat. 9,168,467, “Assembly for separation gas mixtures in fractionating columns,” Oct. 29, 2015.
V. L. Bondarenko, B. O. Pylypenko, and D. P. Tyshko, “Refrigeration cycles in units for neon and its stable isotopes production,” in: 6th International Conference on Cryogenics and Refrigeration, Shanghai, China, Apr. 12–14 (2018), pp. 321–322.
A. Apelblat and Y. Ilamed-Lehrer, “The theory of a real isotope enriching cascade,” J. Nucl. Energy, 22, 1–26 (1967).
V. L. Bondarenko and Yu. M. Simonenko, Cryogenic Technologies for Extracting Rare Gases [in Russian], Astroprint, Odessa (2013), 332 pp.
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Translated from Khimicheskoe i Neftegazovoe Mashinostroenie, Vol. 54, No. 8, pp. 17–21, August, 2018.
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Bondarenko, V.L., Simonenko, Y.M. & Pilipenko, B.A. Multi-Stage Separation of Neon Isotopes Over a Single Column. Chem Petrol Eng 54, 576–583 (2018). https://doi.org/10.1007/s10556-018-0519-7
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DOI: https://doi.org/10.1007/s10556-018-0519-7