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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">10.32362/2410-6593-2018-13-1-45-54</article-id><article-id custom-type="elpub" pub-id-type="custom">chemicallytech-133</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>RESEARCH OF VARIOUS ISO-MANIFOLDS IN FOUR COMPONENT SYSTEMS CONTAINING BIAZEOTROPIC BINARY CONSTITUENTS</article-title><trans-title-group xml:lang="ru"><trans-title>ИССЛЕДОВАНИЕ РАЗЛИЧНЫХ ИЗОМНОГООБРАЗИЙ В ЧЕТЫРЕХКОМПОНЕНТНЫХ СИСТЕМАХ, СОДЕРЖАЩИХ БИАЗЕОТРОПНЫЕ БИНАРНЫЕ СОСТАВЛЯЮЩИЕ</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Бедретдинов</surname><given-names>Ф. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Bedretdinov</surname><given-names>F. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>инженер 1 категории кафедры химии и технологии основного органического синтеза</p><p>119571, Россия, Москва, пр-т Вернадского, д. 86</p></bio><bio xml:lang="en"><p>Engineer of the 1st category, Chair of Chemistry and Technology of Basic Organic Synthesis</p><p>86, Vernadskogo Pr., Moscow 119571, Russia</p></bio><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Челюскина</surname><given-names>Т. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Chelyuskina</surname><given-names>T. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>доктор технических наук, профессор кафедры химии и технологии основного органического синтеза</p><p>119571, Россия, Москва, пр-т Вернадского, д. 86</p></bio><bio xml:lang="en"><p>Dr.Sc. (Eng.), Professor, Chair of Chemistry and Technology of Basic Organic Synthesis</p><p>86, Vernadskogo Pr., Moscow 119571, Russia</p></bio><email xlink:type="simple">cheluskina@mitht.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Московский технологический университет (Институт тонких химических технологий имени М.В. Ломоносова)</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Moscow Technological University (M.V. Lomonosov Institute of Fine Chemical Technologies)</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2018</year></pub-date><pub-date pub-type="epub"><day>28</day><month>02</month><year>2018</year></pub-date><volume>13</volume><issue>1</issue><fpage>45</fpage><lpage>54</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Bedretdinov F.N., Chelyuskina T.V., 2018</copyright-statement><copyright-year>2018</copyright-year><copyright-holder xml:lang="ru">Бедретдинов Ф.Н., Челюскина Т.В.</copyright-holder><copyright-holder xml:lang="en">Bedretdinov F.N., Chelyuskina T.V.</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/133">https://www.finechem-mirea.ru/jour/article/view/133</self-uri><abstract><p>In the present work, an analysis of the mutual arrangement of a number of iso-manifolds in the concentration tetrahedron formed by the components of the separated mixture and an additional substance, an extractive agent, was carried out to estimate the possibility of separating three-component mixtures containing biazeotropic constituents by extractive rectification. The objects of research were four-component systems formed by ternary constituents (butyl propionate (BP) - propionic acid (PA) - butyl butyrate (BB), butyl propionate - propionic acid - butyric acid (BA), butyl butyrate - butyric acid -butyl propionate, butyl butyrate - butyric acid -propionic acid) of the commercially important BP-PA-BB-BA system, and the extractive agent sulfolane. Using the results of the computational experiment based on mathematical model NRTL-HOC we obtained complete data on the vapor-liquid equilibrium in binary, three- and four-component systems. The structures of liquid-vapor phase diagrams were obtained, and thermodynamic-topological analysis of all four-component systems was carried out. The mutual arrangement in the concentration tetrahedron of manifolds of relative volatility (equal to 1) of the components, reflecting the evolution of pseudo-azeotropes in sections with a constant concentration of the extractive agent; pseudo-ideal manifolds along which the activity coefficients of the components of the base (separated) mixture are equal to each other; isothermo-isobaric manifolds generated by Bancroft points in binary azeotropic constituents were determined. We established that it is possible to separate the studied three-component mixtures by extractive rectification using sulfolane.</p></abstract><trans-abstract xml:lang="ru"><p>В данной работе для оценки возможности разделения экстрактивной ректификацией трехкомпонентных смесей, содержащих биазеотропные составляющие, проведен анализ взаимного расположения ряда изомногообразий в концентрационных тетраэдрах, образованных компонентами разделяемой смеси и дополнительным веществом - экстрактивным агентом. Объектами исследования выступают четырехкомпонентные системы, образованные тройными составляющими (бутилпропионат (БП) - пропионовая кислота (ПК) - бутилбутират (ББ); бутилпропионат - пропионовая кислота - масляная кислота (МК); бутилбутират - масляная кислота - бутилпропионат; бутилбутират - масляная кислота - пропионовая кислота) системы БП-ПК-ББ-МК, имеющей промышленное значение, и экстрактивным агентом сульфоланом. В результате проведения вычислительного эксперимента с использованием математической модели NRTL-HOC получены данные о парожидкостном равновесии в бинарных, трех- и четырехкомпонентных системах, а также структуры фазовых диаграмм жидкость-пар и проведен термодинамико-топологический анализ фазовых диаграмм четырехкомпонентных систем. Определено взаимное расположение в концентрационных тетраэдрах многообразий единичной относительной летучести компонентов, отражающих эволюцию псевдоазеотропов в сечениях с постоянной концентрацией экстрактивного агента; псевдоидеальных многообразий, вдоль которых коэффициенты активности компонентов базовой (разделяемой) смеси равны друг другу; изотермо-изобарических многообразий, порождаемых точками Банктрофта в бинарных азеотропных составляющих. Установлено, что существует возможность разделения исследуемых трехкомпонентных смесей экстрактивной ректификацией с использованием сульфолана.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>четырехкомпонентные системы</kwd><kwd>изомногообразия</kwd><kwd>биазеотропные составляющие</kwd><kwd>термодинамико-топологический анализ</kwd><kwd>относительная летучесть</kwd><kwd>псевдоидеальные точки</kwd><kwd>точка Банкрофта</kwd></kwd-group><kwd-group xml:lang="en"><kwd>four-component systems</kwd><kwd>iso-manifolds</kwd><kwd>biazeotropic constituents</kwd><kwd>thermodynamictopological analysis</kwd><kwd>relative volatility</kwd><kwd>pseudoideal points</kwd><kwd>Bancroft point</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">Serafimov L.A., Frolkova A.K., Bushina D.I. 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