<?xml version="1.0" encoding="ISO-8859-1"?><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">
<front>
<journal-meta>
<journal-id>2223-4861</journal-id>
<journal-title><![CDATA[Centro Azúcar]]></journal-title>
<abbrev-journal-title><![CDATA[cen. az.]]></abbrev-journal-title>
<issn>2223-4861</issn>
<publisher>
<publisher-name><![CDATA[Editorial Feijóo]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2223-48612022000400001</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[OBTENCIÓN DE ÉSTERES A PARTIR DE FRACCIONES DESTILADAS DE ACEITE DE FÚSEL: PARTE II]]></article-title>
<article-title xml:lang="en"><![CDATA[OBTAINING ESTERS FROM DISTILLATED FRACTIONS OF FUSEL OIL: PART II]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[de Armas Martínez]]></surname>
<given-names><![CDATA[Ana Celia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gallardo Aguilar]]></surname>
<given-names><![CDATA[Irenia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López Bello]]></surname>
<given-names><![CDATA[Nancy]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Central &#8220;Marta Abreu&#8221; de Las Villas Facultad de Química y Farmacia Departamento de Ingeniería Química]]></institution>
<addr-line><![CDATA[Santa Clara Villa Clara]]></addr-line>
<country>Cuba</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2022</year>
</pub-date>
<volume>49</volume>
<numero>4</numero>
<fpage>1</fpage>
<lpage>11</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S2223-48612022000400001&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S2223-48612022000400001&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S2223-48612022000400001&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN  Introducción:  El aceite de fúsel constituye una impureza del proceso de obtención de etanol, a partir de él se pueden obtener productos de alto valor agregado como los ésteres.  Objetivo:  Obtener experimentalmente acetato de isoamilo aprovechando la fracción pesada (&gt;132 oC) separada en la destilación del aceite de fúsel.  Materiales y Métodos:  El estudio experimental se realizó en cuatro etapas: deshidratación del aceite de fúsel por extracción líquido - líquido con una solución saturada de cloruro de sodio, empleando el sulfato de sodio anhidro como agente desecante; separación de los alcoholes presentes por destilación, esterificación y purificación del producto final. En la esterificación se realizó un diseño de experimentos Plackett-Burman analizando el efecto, en el rendimiento, de las variables: relación de alimentación, tiempo de reacción y cantidad de catalizador.  Resultados y Discusión:  El agua eliminada representó el 24 % de la muestra inicial de aceite de fúsel y al destilar y caracterizar por cromatografía gaseosa, se obtuvo que la fracción de trabajo (&gt;132 oC) contenía un 95,09 % p/p de alcohol isoamílico. El mayor rendimiento de acetato de isoamilo se alcanzó en el experimento IV, al emplear una relación de alimentación ácido/alcohol de 1,2, 60 min de reacción y 0,5 % p/p de catalizador, obteniéndose en la purificación el éster a un 98,01 % p/p.  Conclusiones: El aceite de fúsel empleado contenía etanol, n-propanol, isobutanol y alcohol isoamílico. La esterificación de la fracción pesada, con mayor presencia de alcohol isoamílico, permitió obtener su éster correspondiente con altos niveles de pureza.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT  Introduction: Fusel oil is an impurity in the ethanol production process, from which high value-added products such as esters can be obtained.  Objective: To experimentally obtain isoamyl acetate by taking advantage of the heavy fraction (&gt;132 oC) separated in the distillation of fusel oil.  Materials and Methods: The experimental study was carried out in four stages: dehydration of the fusel oil by liquid-liquid extraction with a saturated sodium chloride solution, using anhydrous sodium sulfate as a drying agent; separation of the alcohols present by distillation, esterification and purification of the final product. In the esterification, a Plackett-Burman design of experiments was performed analyzing the effect, on the yield, of the variables: feed ratio, reaction time and amount of catalyst.  Results and Discussion: The water removed represented 24 % of the initial fusel oil sample and upon distillation and characterization by gas chromatography, the working fraction (&gt;132 oC) was found to contain 95.09 % w/w isoamyl alcohol. The highest yield of isoamyl acetate was achieved in experiment IV, when using an acid/alcohol feed ratio of 1.2, 60 min of reaction and 0.5 % w/w catalyst, obtaining in the purification the ester at 98.01 % w/w.  Conclusions: The fusel oil used contained ethanol, n-propanol, isobutanol and isoamyl alcohol. The esterification of the heavy fraction, with greater presence of isoamyl alcohol, allowed obtaining its corresponding ester with high levels of purity.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[aceite fúsel]]></kwd>
<kwd lng="es"><![CDATA[acetato de isoamilo]]></kwd>
<kwd lng="es"><![CDATA[fracción pesada]]></kwd>
<kwd lng="es"><![CDATA[rendimiento]]></kwd>
<kwd lng="en"><![CDATA[fusel oil]]></kwd>
<kwd lng="en"><![CDATA[isoamyl acetate]]></kwd>
<kwd lng="en"><![CDATA[heavy fraction]]></kwd>
<kwd lng="en"><![CDATA[yield]]></kwd>
</kwd-group>
</article-meta>
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