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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">10.32362/2410-6593-2019-14-5-51-60</article-id><article-id custom-type="elpub" pub-id-type="custom">chemicallytech-1549</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>Comparison of alternative methods for methyl acetate + methanol + acetic acid + acetic anhydride mixture separation</article-title><trans-title-group xml:lang="ru"><trans-title>Сравнение альтернативных методов разделения смеси метилацетат – метанол – уксусная кислота – уксусный ангидрид</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5675-5777</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Фролкова</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Frolkova</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Фролкова Анастасия Валериевна, кандидат технических наук, доцент кафедры химии и технологии основного органического синтеза</p><p>ResearcherID N-4517-2014</p><p>119571, Москва, пр. Вернадского, д. 86</p></bio><bio xml:lang="en"><p>Anastasiya V. Frolkova, Cand of Sci. (Engineering), Associate Professor, Chair of Chemistry and Technology of Basic Organic Synthesis</p><p>ResearcherID N-4517-2014</p><p>86, Vernadskogo pr., Moscow 119571, Russia</p></bio><email xlink:type="simple">frolkova_nastya@mail.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>Шашкова</surname><given-names>Ю. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Shashkova</surname><given-names>Yu. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Шашкова Юлия Игоревна, менеджер, ТД «ХИММЕД»</p><p>115230, Москва, Каширское шоссе, дом 9, корп. 3</p></bio><bio xml:lang="en"><p>Yuliya I. Shashkova, Manager, Company СHIMMED</p><p>9, bild. 3, Kashirskoe shosse, Moscow 115230, Russia</p></bio><email xlink:type="simple">juliashashkova82@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9763-4717</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Фролкова</surname><given-names>А. К.</given-names></name><name name-style="western" xml:lang="en"><surname>Frolkova</surname><given-names>А. К.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Фролкова Алла Константиновна, доктор технических наук, профессор, заведующий кафедрой химии и технологии основного органического синтеза</p><p>ResearcherID G-7001-2018</p><p>119571, Москва, пр. Вернадского, д. 86</p></bio><bio xml:lang="en"><p>Alla K. Frolkova, Dr. of Sci. (Engineering), Professor, Head of the Chair of Chemistry and Technology of Basic Organic Synthesis</p><p>ResearcherID G-7001-2018</p><p>86, Vernadskogo pr., Moscow 119571, Russia</p></bio><email xlink:type="simple">frolkova@gmail.com</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>Маевский</surname><given-names>М. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Mayevskiy</surname><given-names>М. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Маевский Марк Александрович, аспирант кафедры химии и технологии основного органического синтеза</p><p>119571, Москва, пр. Вернадского, д. 86</p></bio><bio xml:lang="en"><p>Mark A. Maevskiy, Postgraduate Student, Chair of Chemistry and Technology of Basic Organic Synthesis</p><p>86, Vernadskogo pr., Moscow 119571, Russia</p></bio><email xlink:type="simple">markhirurg@list.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>МИРЭА – Российский технологический университет (Институт тонких химических технологий имени М.В. Ломоносова)</institution><country>Россия</country></aff><aff xml:lang="en"><institution>MIREA – Russian Technological University (M.V. Lomonosov Institute of Fine Chemical Technologies)</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2019</year></pub-date><pub-date pub-type="epub"><day>14</day><month>11</month><year>2019</year></pub-date><volume>14</volume><issue>5</issue><fpage>51</fpage><lpage>60</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Frolkova A.V., Shashkova Y.I., Frolkova А.К., Mayevskiy М.A., 2019</copyright-statement><copyright-year>2019</copyright-year><copyright-holder xml:lang="ru">Фролкова А.В., Шашкова Ю.И., Фролкова А.К., Маевский М.А.</copyright-holder><copyright-holder xml:lang="en">Frolkova A.V., Shashkova Y.I., Frolkova А.К., Mayevskiy М.A.</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/1549">https://www.finechem-mirea.ru/jour/article/view/1549</self-uri><abstract><sec><title>Objectives</title><p>Objectives. The paper is a comparative analysis of methyl acetate + methanol + acetic acid + acetic anhydride industrial mixture separation flowsheets based on the use of special distillation methods (extractive distillation and pressure-swing distillation). The results obtained illustrate the variability of the structure of the technological separation flowsheet.</p></sec><sec><title>Methods</title><p>Methods. Mathematical modeling using the software package Aspen Plus V. 10.0 was chosen as the research method. The simulation was based on the local composition equation NRTL and the Hayden–O’Connell equation of state. The relative uncertainties of phase equilibrium description do not exceed 3%.</p></sec><sec><title>Results</title><p>Results. The vapor–liquid diagram of the quaternary mixture of methyl acetate + methanol + acetic acid + acetic anhydride was studied using thermodynamic topological analysis. It was shown that the system contains one binary azeotrope and is characterized by one distillation region. Although the structure is not complex, there is a possibility of using several methods for mixture separation: pressure-swing distillation, and extractive distillation with different entrainers. Twelve flowsheets with different structure were proposed, and 29 variants of separation were compared.</p></sec><sec><title>Conclusions</title><p>Conclusions. It was shown that the most perspective structure for the separation of a methyl acetate + methanol + acetic acid + acetic anhydride mixture is a combination of distributed sequence separation and extractive distillation.</p></sec></abstract><trans-abstract xml:lang="ru"><sec><title>Цели</title><p>Цели. Целью работы является сравнительный анализ технологических схем разделения промышленной смеси метилацетат – метанол – уксусная кислота – уксусный ангидрид, основанных на использовании специальных методов разделения: экстрактивная ректификация и варьирование давления. Полученные результаты иллюстрируют вариативность структуры технологической схемы разделения.</p></sec><sec><title>Методы</title><p>Методы. В качестве метода исследования выбрано математическое моделирование в программном комплексе Aspen Plus V. 10.0. Моделирование основывалось на уравнении локального состава NRTL и уравнении состояния Хейдена–О'Коннелла. Относительные ошибки описания фазового равновесия не превышают 3%.</p></sec><sec><title>Результаты</title><p>Результаты. С помощью термодинамико-топологического анализа изучена диаграмма парожидкостного равновесия четырехкомпонентной системы метилацетат – метанол – уксусная кислота – уксусный ангидрид. Показано, что система содержит один бинарный азеотроп и характеризуется одной областью дистилляции. Несмотря на то, что структура не является сложной, существует возможность использования нескольких методов разделения смеси: ректификация с варьированием давления, экстрактивная ректификация с различными разделяющими агентами. Предложено 12 технологических схем различной структуры и проведен сравнительный анализ 29 вариантов разделения.</p></sec><sec><title>Заключение</title><p>Заключение. Показано, что наиболее эффективным для разделения смеси метилацетат – метанол – уксусная кислота – уксусный ангидрид является сочетание промежуточного режима разделения смеси и экстрактивной ректификации.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>метилацетат</kwd><kwd>азеотроп</kwd><kwd>экстрактивная ректификация</kwd><kwd>варьирование давления</kwd><kwd>схема разделения</kwd></kwd-group><kwd-group xml:lang="en"><kwd>azeotrope</kwd><kwd>extractive distillation</kwd><kwd>pressure-swing distillation</kwd><kwd>separation flowsheet</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">The work was carried out with support from the Russian Science Foundation (grant No. 16-19-10632).</funding-statement><funding-statement xml:lang="en">The work was carried out with support from the Russian Science Foundation (grant No. 16-19-10632).</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Liang S., Cao Y., Liu X., Li X., Zhao Y., Wang Y., Wang Y. 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