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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="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Russian Journal of Physical Chemistry A</journal-id><journal-title-group><journal-title xml:lang="en">Russian Journal of Physical Chemistry A</journal-title><trans-title-group xml:lang="ru"><trans-title>Журнал физической химии</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0044-4537</issn><issn publication-format="electronic">3034-5537</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">685269</article-id><article-id pub-id-type="doi">10.31857/S0044453725020068</article-id><article-id pub-id-type="edn">DEEODK</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>CHEMICAL THERMODYNAMICS AND THERMOCHEMISTRY</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>ХИМИЧЕСКАЯ ТЕРМОДИНАМИКА И ТЕРМОХИМИЯ</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Vapor–liquid equilibrium measurement of methanol–chloroform–tetrahydrofuran and methanol–chloroform–tetrahydrofuran–dimethyl sulfoxide mixtures at 101.32 kPa</article-title><trans-title-group xml:lang="ru"><trans-title>Исследование парожидкостного равновесия смесей метанол–хлороформ–тетрагидрофуран и метанол–хлороформ–тетрагидрофуран–диметилсульфоксид при 101.32 кПа</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Zhuchkov</surname><given-names>V. I.</given-names></name><name xml:lang="ru"><surname>Жучков</surname><given-names>В. И.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>raevalentina1@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Raeva</surname><given-names>V. M.</given-names></name><name xml:lang="ru"><surname>Раева</surname><given-names>В. М.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>raevalentina1@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Ryzhkin</surname><given-names>D. A.</given-names></name><name xml:lang="ru"><surname>Рыжкин</surname><given-names>Д. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>raevalentina1@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">MIREA — Russian Technological University, M. V. Lomonosov Institute of Fine Chemical Technologies</institution></aff><aff><institution xml:lang="ru">МИРЭА –Российский технологический университет, Институт тонких химических технологий им. М. В. Ломоносова</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2025-02-15" publication-format="electronic"><day>15</day><month>02</month><year>2025</year></pub-date><volume>99</volume><issue>2</issue><fpage>216</fpage><lpage>225</lpage><history><date date-type="received" iso-8601-date="2025-06-19"><day>19</day><month>06</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, Russian Academy of Sciences</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, Российская академия наук</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="en">Russian Academy of Sciences</copyright-holder><copyright-holder xml:lang="ru">Российская академия наук</copyright-holder></permissions><self-uri xlink:href="https://journals.eco-vector.com/0044-4537/article/view/685269">https://journals.eco-vector.com/0044-4537/article/view/685269</self-uri><abstract xml:lang="en"><p>The vapor-liquid equilibrium of methanol-chloroform-tetrahydrofuran mixtures of different composition and methanol-chloroform-tetrahydrofuran-dimethyl sulfoxide mixtures with different content of dimethyl sulfoxide at 101.32 kPa is studied experimentally. Experimental and calculated values of relative volatility of substances in four-component mixtures are compared. The results of extractive rectification of ternary mixtures on the basis of experimental and calculated data obtained by the NRTL model are predicted.</p></abstract><trans-abstract xml:lang="ru"><p>Экспериментально изучено парожидкостное равновесие смесей метанол–хлороформ–тетрагидрофуран различного состава и метанол–хлороформ–тетрагидрофуран–диметилсульфоксид с разным содержанием диметилсульфоксида при 101.32 кПа. Проведено сравнение экспериментальных и расчетных значений относительной летучести веществ в четырехкомпонентных смесях. Дан прогноз результатов экстрактивной ректификации тройных смесей на основании экспериментальных данных и расчетных данных, полученных по модели NRTL</p></trans-abstract><kwd-group xml:lang="en"><kwd>vapor-liquid equilibrium</kwd><kwd>azeotrope</kwd><kwd>relative volatility of components</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>парожидкостное равновесие</kwd><kwd>азеотроп</kwd><kwd>относительная летучесть компонентов</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">Правительство РФ</institution></institution-wrap><institution-wrap><institution xml:lang="en">Government of RF</institution></institution-wrap></funding-source></award-group></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Фролкова А.К. Разделение азеотропных смесей. Физико-химические основы и технологические приемы. М.: ВЛАДОС, 2010. 192 с. [Frolkova A.K. Separation of azeotropic mixtures. 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