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<article article-type="research-article" dtd-version="1.3" 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" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">chemicallytech</journal-id><journal-title-group><journal-title xml:lang="en">Fine Chemical Technologies</journal-title><trans-title-group xml:lang="ru"><trans-title>Тонкие химические технологии</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2410-6593</issn><issn pub-type="epub">2686-7575</issn><publisher><publisher-name>MIREA – Russian Technological University (RTU MIREA).</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.32362/2410-6593-2019-14-1-47-58</article-id><article-id custom-type="elpub" pub-id-type="custom">chemicallytech-187</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>THEORETICAL BASIS OF CHEMICAL TECHNOLOGY</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ТЕОРЕТИЧЕСКИЕ ОСНОВЫ ХИМИЧЕСКОЙ ТЕХНОЛОГИИ</subject></subj-group></article-categories><title-group><article-title>CHEMICAL EQUILIBRIUM IN THE PROPIONIC ACID - ETHANOL - ETHYL PROPIONATE - WATER SYSTEM AND EXTRACTION PROCESSES WITH PARTICIPATION OF DEEP EUTECTIC SOLVENTS</article-title><trans-title-group xml:lang="ru"><trans-title>ХИМИЧЕСКОЕ РАВНОВЕСИЕ В СИСТЕМЕ ПРОПИОНОВАЯ КИСЛОТА - ЭТИЛОВЫЙ СПИРТ - ЭТИЛПРОПИОНАТ - ВОДА И ЭКСТРАКЦИОННЫЕ ПРОЦЕССЫ С УЧАСТИЕМ ГЛУБОКИХ ЭВТЕКТИЧЕСКИХ РАСТВОРИТЕЛЕЙ</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-7453-1379</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Тойкка</surname><given-names>М. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Toikka</surname><given-names>M. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>кандидат химических наук, доцент кафедры химической термодинамики и кинетики</p><p>199034, Россия, Санкт-Петербург, Университетская набережная, д. 7-9</p><p>Researcher ID: I-7147-2013.</p></bio><bio xml:lang="en"><p>Ph.D., Associate Professor, Chair of Chemical Thermodynamics and Kinetics</p><p>7-9, Universitetskaya Emb., St. Petersburg, 199034, Russia</p><p>Researcher ID: I-7147-2013</p></bio><email xlink:type="simple">m.toikka@spbu.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9385-1335</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Самаров</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Samarov</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>кандидат химических наук, ассистент кафедры химической термодинамики и кинетики</p><p>199034, Россия, Санкт-Петербург, Университетская набережная, д. 7-9</p><p>Researcher ID: I-7156-2013.</p></bio><bio xml:lang="en"><p>Ph.D., Assistant Professor, Chair of Chemical Thermodynamics and Kinetics, Institute of Chemistry</p><p>7-9, Universitetskaya Emb., St. Petersburg, 199034, Russia</p><p>Researcher ID: I-7156-2013</p></bio><email xlink:type="simple">artemy.samarov@spbu.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4859-3792</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Садаева</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Sadaev</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>аспирант кафедры химической термодинамики и кинетики</p><p>199034, Россия, Санкт-Петербург, Университетская набережная, д. 7-9</p><p>Researcher ID: O-6613-2017</p></bio><bio xml:lang="en"><p>Postgraduate Student, Chair of Chemical Thermodynamics and Kinetics, Institute of Chemistry</p><p>7-9, Universitetskaya Emb., St. Petersburg 199034, Russia</p><p>Researcher ID: O-6613-2017</p></bio><email xlink:type="simple">a.sadaeva@2011.spbu.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3910-1047</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Сенина</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Senina</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>студент кафедры химической термодинамики и кинетики</p><p>199034, Россия, Санкт-Петербург, Университетская набережная, д. 7-9</p><p>Researcher ID: X-6846-2018</p></bio><bio xml:lang="en"><p>Student, Chair of Chemical Thermodynamics and Kinetics,</p><p>7-9, Universitetskaya Emb., St. Petersburg, 199034, Russia</p><p>Researcher ID: X-6846-2018</p></bio><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-8383-8890</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Лобачева</surname><given-names>О. Л.</given-names></name><name name-style="western" xml:lang="en"><surname>Lobacheva</surname><given-names>O. L.</given-names></name></name-alternatives><bio xml:lang="ru"><p>кандидат химических наук, доцент кафедры общей химии факультета переработки минерального сырья</p><p>199106, Россия, Санкт-Петербург, Васильевский остров, 21 линия, д. 2</p><p>Researcher ID: G-6008-2011</p></bio><bio xml:lang="en"><p>Ph.D., Associate Professor, Chair of General Chemistry, Faculty of Mineral Processing</p><p>2, 21st Line, St. Petersburg 199106, Russia</p><p>Researcher ID: G-6008-2011.</p></bio><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Санкт-Петербургский государственный университет, Институт химии</institution><country>Россия</country></aff><aff xml:lang="en"><institution>St. Petersburg State University, Institute of Chemistry</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Санкт-Петербургский горный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>St. Petersburg Mining University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2019</year></pub-date><pub-date pub-type="epub"><day>28</day><month>02</month><year>2019</year></pub-date><volume>14</volume><issue>1</issue><fpage>47</fpage><lpage>58</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Toikka M.A., Samarov A.A., Sadaev A.A., Senina A.A., Lobacheva O.L., 2019</copyright-statement><copyright-year>2019</copyright-year><copyright-holder xml:lang="ru">Тойкка М.А., Самаров А.А., Садаева А.А., Сенина А.А., Лобачева О.Л.</copyright-holder><copyright-holder xml:lang="en">Toikka M.A., Samarov A.A., Sadaev A.A., Senina A.A., Lobacheva O.L.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://www.finechem-mirea.ru/jour/article/view/187">https://www.finechem-mirea.ru/jour/article/view/187</self-uri><abstract><p>New experimental data on the chemical equilibrium in the propionic acid - ethanol - ethyl propionate - water system at 293.15 K and atmospheric pressure are presented. Chemically equilibrium compositions corresponding to the liquid-liquid equilibrium were obtained by gas chromatographic analysis. Using the method of nuclear magnetic resonance, homogeneous chemically equilibrium compositions were determined and the concentration equilibrium constant is calculated. The surface of chemical equilibrium and the region of splitting chemically equilibrium compositions are represented in the square of the transformed concentration variables. Comparison of the data obtained in the work with the literature was carried out at 303.15 and 313.15 K. It was found that the region of such compositions decreases with increasing temperature, while the surface of chemical equilibrium does not change the shape and position in the concentration space in the temperature range 293.15-313.15 K and atmospheric pressure. Liquid-liquid equilibrium compositions have also been obtained by gas chromatographic analysis for ethanol and ethyl propionate in the pseudo-ternary system using deep eutectic solvents (DES) based on choline chloride and glycerol / urea in whole range of concentration. The analysis of the extraction properties of DES showed the highest efficiency of DES based on choline chloride and urea. Experimental data on phase equilibrium are processed using Othmer-Tobias and Hand models. The calculated correlation coefficient (more than 0.99) indicates a high internal consistency of the experimental data obtained in this work.</p></abstract><trans-abstract xml:lang="ru"><p>В работе приведены новые экспериментальные данные о химическом равновесии в системе пропионовая кислота - этиловый спирт - этилпропионат - вода при 293.15 К и атмосферном давлении. Методом газового хроматографического анализа найдены составы химически равновесных фаз, отвечающие фазовому равновесию жидкостьжидкость. С использованием метода 1H-ЯМР определены гомогенные химически равновесные составы, на основании которых рассчитана концентрационная константа равновесия. Поверхность химического равновесия и область расслаивающихся химически равновесных составов представлены в квадрате трансформированных концентрационных переменных. Проведено сравнение полученных в работе данных с литературными при 303.15 и 313.15 K. Экспериментально установлено, что область этих составов уменьшается с ростом температуры, при этом поверхность химического равновесия не меняет форму и положение в концентрационном пространстве в температурном интервале 293.15-313.15 К и атмосферном давлении. Получены также составы, отвечающие фазовому равновесию жидкость-жидкость, методом газохроматографического анализа для псевдотройной системы этиловый спирт и этилпропионат с участием глубоких эвтектических растворителей (deep eutectic solvents, DES) на основе хлорида холина и глицерина/мочевины во всем диапазоне концентраций. Анализ экстракционных свойств DES показал наибольшую эффективность DES на основе хлорида холина и мочевины. Экспериментальные данные о фазовом равновесии обработаны с использованием моделей Отмера-Тобиаса и Ханда. Рассчитанный коэффициент корреляции (выше 0.99) подтверждает высокую внутреннюю согласованность полученных в работе экспериментальных данных.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>химическое и фазовое равновесие</kwd><kwd>глубокие эвтектические растворители</kwd><kwd>этилпропионат</kwd></kwd-group><kwd-group xml:lang="en"><kwd>chemical and phase equilibrium</kwd><kwd>deep eutectic solvents</kwd><kwd>ethyl propionate</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Фролкова А.В., Акишина А.А., Маевский М.А., Аблизин М.А. 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