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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">10.32362/2410-6593-2020-15-5-7-15</article-id><article-id custom-type="elpub" pub-id-type="custom">chemicallytech-1645</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>Contact crystallization of substances from solutions using evaporating refrigerants</article-title><trans-title-group xml:lang="ru"><trans-title>Контактная кристаллизация веществ из растворов с применением испаряющегося хладагента</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>Носов</surname><given-names>Г. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Nоsоv</surname><given-names>G. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Носов Геннадий Алексеевич, доктор технических наук, профессор кафедры процессов и аппаратов химических технологий имени Н.И. Гельперина. Scopus Author ID 7003643516</p><p>119571, Россия, Москва, пр-т Вернадского, д. 86</p></bio><bio xml:lang="en"><p>Gennadi А. Nosov, Dr. of Sci. (Engineering), Professor, N.I. Gel’perin Department of Processes and Apparatus of Chemical Technologies. Scopus Author ID 7003643516</p><p>86, Vernadskogo pr., Moscow, 119571, Russia</p></bio><email xlink:type="simple">nosovga@mail.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/0000-0003-3184-8496</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Уваров</surname><given-names>М. Е.</given-names></name><name name-style="western" xml:lang="en"><surname>Uvаrоv</surname><given-names>M. E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Уваров Михаил Евгеньевич, старший преподаватель кафедры процессов и аппаратов химических технологий имени Н.И. Гельперина</p><p>119571, Россия, Москва, пр-т Вернадского, д. 86</p></bio><bio xml:lang="en"><p>Mikhail E. Uvarov, Senior Teacher, N.I. Gel’perin Department of Processes and Apparatus of Chemical Technologies</p><p>86, Vernadskogo pr., Moscow, 119571, Russia</p></bio><email xlink:type="simple">uvamikhail@yandex.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 им. 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>2020</year></pub-date><pub-date pub-type="epub"><day>14</day><month>11</month><year>2020</year></pub-date><volume>15</volume><issue>5</issue><fpage>7</fpage><lpage>15</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Nоsоv G.A., Uvаrоv M.E., 2020</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="ru">Носов Г.А., Уваров М.Е.</copyright-holder><copyright-holder xml:lang="en">Nоsоv G.A., Uvаrоv M.E.</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/1645">https://www.finechem-mirea.ru/jour/article/view/1645</self-uri><abstract><sec><title>Objectives</title><p>Objectives. The aim of this study was to analyze the possibility of using contact crystallization with evaporating refrigerants for the isolation of substances from their aqueous solutions using salts [KNO3, NaI, and (NH2)2CO] as extraction examples and sucrose. Isobutane was used as a refrigerant.</p></sec><sec><title>Methods</title><p>Methods. The analysis of the influence of the main technological parameters (i.e., solution’s cooling temperature, initial concentration, and compressed refrigerant vapor pressure) on the separation process and identification of its regularities was performed using mathematical dependencies previously developed by N.I. Gelperin and G.A. Nosov for each stage of the contact crystallization process. The authors studied the influence of these parameters on the yield of crystalline and liquid phases, refrigerant consumption, and compressor power.</p></sec><sec><title>Results</title><p>Results. The study showed that the use of evaporating refrigerants can significantly intensify the process of separating the mixture and spent refrigerant from the resulting crystalline suspension. This occurs owing to the evaporation of the liquid refrigerant that is in contact with the solution, which is accompanied by intense cooling. This process can be carried out at the temperature difference between the refrigerant and crystallizing mixture in the range of 0.5–1.0°C.</p></sec><sec><title>Conclusions</title><p>Conclusions. Contact crystallization with evaporating refrigerants can be successfully applied to separate various substances from aqueous solutions. An important advantage of this process is the relatively low refrigerant consumption because heat removal from the solution is carried out as a result of changes in the aggregate state of the refrigerant. The use of contact crystallization can also considerably simplify the equipment.</p></sec></abstract><trans-abstract xml:lang="ru"><sec><title>Цели</title><p>Цели. Статья анализирует возможность применения контактной кристаллизации с использованием испаряющихся хладагентов для выделения веществ из их водных растворов на примере извлечения некоторых солей (KNO3, NaI, (NH2)2CO) и сахарозы. В качестве хладагента использован изобутан.</p></sec><sec><title>Методы</title><p>Методы. Изучение влияния основных технологических параметров – температуры охлаждения раствора, его исходной концентрации и давления сжатых паров хладагента – на ход рассматриваемого процесса разделения, а также выявление закономерностей его протекания проводилось с помощью выведенных ранее Н.И. Гельпериным и Г.А. Носовым математических зависимостей для каждой стадии процесса контактной кристаллизации. Авторы исследовали влияние указанных параметров на выход кристаллической и жидкой фаз, расход хладагента и мощность компрессора.</p></sec><sec><title>Результаты</title><p>Результаты. Установлено, что применение испаряющихся хладагентов позволяет существенно интенсифицировать процесс кристаллизации и облегчает отделение отработанного хладагента от образующейся кристаллической суспензии. Это обусловлено тем, что при контакте жидкого хладагента с раствором происходит его испарение, которое сопровождается интенсивным охлаждением раствора. Установлено, что такой процесс может осуществляться при разности температур хладагента и кристаллизующейся смеси порядка 0.5–1.0 °C.</p></sec><sec><title>Выводы</title><p>Выводы. Контактная кристаллизация с использованием испаряющихся хладагентов может быть успешно применена для выделения различных веществ из водных растворов. Важным преимуществом проведения подобного процесса является относительно не- большой расход хладагента, поскольку отвод теплоты из раствора осуществляется в результате изменения агрегатного состояния хладагента. Использование контактной кристаллизации позволяет также значительно упростить аппаратурное оформление процесса.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>кристаллизация</kwd><kwd>контактное охлаждение</kwd><kwd>испаряющиеся хладагенты</kwd><kwd>водные растворы</kwd></kwd-group><kwd-group xml:lang="en"><kwd>crystallization</kwd><kwd>contact cooling</kwd><kwd>evaporating refrigerants</kwd><kwd>aqueous solutions</kwd></kwd-group><funding-group><funding-statement xml:lang="en">This article has been translated from Russian into English by S. 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