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<article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="other" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Russian Journal of Inorganic Chemistry</journal-id><journal-title-group><journal-title xml:lang="en">Russian Journal of Inorganic Chemistry</journal-title><trans-title-group xml:lang="ru"><trans-title>Журнал неорганической химии</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0044-457X</issn><issn publication-format="electronic">3034-560X</issn><publisher><publisher-name xml:lang="en">The Russian Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">665289</article-id><article-id pub-id-type="doi">10.31857/S0044457X22601468</article-id><article-id pub-id-type="edn">JDFBZF</article-id><article-categories><subj-group subj-group-type="toc-heading"><subject>ФИЗИКОХИМИЯ РАСТВОРОВ</subject></subj-group><subj-group subj-group-type="article-type"><subject>Unknown</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Isolation of Concentrated Fractions of Components from Solutions in a Cascade of Multistage Extraction Columns by Recycling Liquid–Liquid Chromatography</article-title><trans-title-group xml:lang="ru"><trans-title>Выделение из растворов концентрированных фракций компонентов в каскаде многоступенчатых экстракционных колонн методами рециркуляционной жидкостно-жидкостной хроматографии</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kostanyan</surname><given-names>A. E.</given-names></name><name xml:lang="ru"><surname>Костанян</surname><given-names>А. Е.</given-names></name></name-alternatives><email>kost@igic.ras.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Tsareva</surname><given-names>Yu. V.</given-names></name><name xml:lang="ru"><surname>Царева</surname><given-names>Ю. В.</given-names></name></name-alternatives><email>kost@igic.ras.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Belova</surname><given-names>V. V.</given-names></name><name xml:lang="ru"><surname>Белова</surname><given-names>В. В.</given-names></name></name-alternatives><email>kost@igic.ras.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">Институт общей и неорганической химии им. Н.С. Курнакова РАН</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2023-03-01" publication-format="electronic"><day>01</day><month>03</month><year>2023</year></pub-date><volume>68</volume><issue>3</issue><fpage>357</fpage><lpage>362</lpage><history><date date-type="received" iso-8601-date="2025-02-26"><day>26</day><month>02</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2023, А.Е. Костанян, Ю.В. Царева, В.В. Белова</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2023, А.Е. Костанян, Ю.В. Царева, В.В. Белова</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="en">А.Е. Костанян, Ю.В. Царева, В.В. Белова</copyright-holder><copyright-holder xml:lang="ru">А.Е. Костанян, Ю.В. Царева, В.В. Белова</copyright-holder></permissions><self-uri xlink:href="https://transsyst.ru/0044-457X/article/view/665289">https://transsyst.ru/0044-457X/article/view/665289</self-uri><abstract xml:lang="en"><p>The paper describes the results of an experimental study of the extraction isolation of concentrated fractions of components from solutions by recycling liquid–liquid chromatography in a setup composed of five multistage extraction columns connected in series. The process includes multiple injection of the solution of the components into the system. The adequacy of the previously developed mathematical model to the real process is confirmed and the validity of the obtained equations for the modeling and development of various types of separation processes is demonstrated.</p></abstract><trans-abstract xml:lang="ru"><p id="idm45181324677248">Приведены результаты экспериментального исследования процесса экстракционного выделения из растворов концентрированных фракций компонентов на установке, состоящей из пяти последовательно соединенных многоступенчатых экстракционных колонн, методом рециркуляционной жидкостно-жидкостной хроматографии при многократной загрузке в установку раствора разделяемых компонентов. Подтверждена адекватность ранее разработанной математической модели реальному процессу и справедливость полученных уравнений для моделирования и разработки различных вариантов рассматриваемых процессов разделения.</p></trans-abstract><kwd-group xml:lang="en"><kwd>liquid extraction</kwd><kwd>recycling liquid–liquid chromatography</kwd><kwd>isolation of concentrated fractions of components from solutions</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>жидкостная экстракция</kwd><kwd>рециркуляционная жидкостно-жидкостная хроматография</kwd><kwd>выделение из растворов концентрированных фракций компонентов</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Ito Y. // J. Chromatogr. A. 2005. V. 1065. P. 145. https://doi.org/10.1016/j.chroma.2004.12.044</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Conway W.D. // J. Chromatogr. A. 2011. V. 1218. 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