<?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>2224-6185</journal-id>
<journal-title><![CDATA[Tecnología Química]]></journal-title>
<abbrev-journal-title><![CDATA[RTQ]]></abbrev-journal-title>
<issn>2224-6185</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Oriente]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2224-61852020000100169</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Lixiviación del magnesio en solución carbonato amoniacal]]></article-title>
<article-title xml:lang="en"><![CDATA[Magnesium leaching in ammoniacal carbonate solution]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rojas-Vargas]]></surname>
<given-names><![CDATA[Armando]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Trujillo-Nieves]]></surname>
<given-names><![CDATA[María Elena]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Salazar-Infante]]></surname>
<given-names><![CDATA[Yaidisury]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Chapman-González]]></surname>
<given-names><![CDATA[Lisset]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Empresa de Servicios Técnicos de Computación, Comunicaciones y Electrónica del Níquel (SERCONI)  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="Af2">
<institution><![CDATA[,Centro de Investigaciones para la industria Minero Metalúrgica (CIPIMM)  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="Af3">
<institution><![CDATA[,Empresa de Servicios NICAROTEC  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="Af4">
<institution><![CDATA[,Centro de Investigaciones del Níquel (CEDINIQ)  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2020</year>
</pub-date>
<volume>40</volume>
<numero>1</numero>
<fpage>169</fpage>
<lpage>182</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S2224-61852020000100169&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S2224-61852020000100169&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S2224-61852020000100169&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Se estudió experimentalmente la lixiviación del magnesio en solución carbonato amoniacal, del mineral laterítico procesado en los hornos de reducción de la planta productora de níquel en Nicaro, Cuba, con el propósito de determinar el efecto de la concentración de amoníaco, relación amoníaco - dióxido de carbono, la temperatura y el contenido de magnesio libre, sobre la cinética de reacción y la concentración de sobresaturación del licor. El mineral se tomó a la descarga de los enfriadores rotatorios en atmósfera inerte; y el licor se preparó con agua destilada, disolución de NH4OH y Licor Fresco carbonato-amoniacal. Se obtuvo que al incrementar la concentración de amoníaco de 60 a 80 g/L y disminuir la relación NH3/CO2 de 2,0 a 1,5 en el licor de lixiviación, a la temperatura de 42ºC, la concentración de sobresaturación del magnesio decreció debido a que la resultante de velocidad de lixiviación de orden cero aumentó propiciando la nucleación, y a su vez, incrementó la velocidad de precipitación de primer orden; mientras que al aumentar la temperatura de 42 a 54ºC, a 60 g/L de NH3 y relación NH3/CO2 igual a 1,8, se produjo un efecto adverso al proceso, incrementó la velocidad de lixiviación, disminuyó la velocidad de precipitación y aumentó la concentración de sobresaturación de 409 a 600 mg/L. A menor contenido de magnesio libre en el mineral reducido, menor la concentración de magnesio disuelto en el licor de lixiviación.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT The magnesium leaching was studied experimentally in ammoniacal carbonate solution, of the lateritic ore processed in the reduction furnaces of the nickel-producing plant in Nicaro, Cuba, in order to determine the effect of ammonia concentration, ammonia - carbon dioxide ratio, temperature and the free magnesium content, over reaction kinetics and liquor supersaturation concentration. The ore was taken in the discharge of the rotary coolers in an inert atmosphere; and the liquor was prepared with distilled water, NH4OH solution and ammoniacal-carbonate Fresh Liquor. It was obtained that by increasing the concentration of ammonia from 60 to 80 g/L and decreasing the NH3/CO2 ratio from 2,0 to 1,5 in the leaching liquor, at the temperature of 42 ° C, the magnesium supersaturation concentration decreased because of the zero-order leaching resulting rate increased, leading nucleation, and in turn the first-order precipitation rate increased; while increasing the temperature from 42 to 54 °C, to 60 g/L of NH3 and NH3/CO2 ratio equal to 1,8, there was an adverse effect to the process, the leaching rate increased, the precipitation rate decreased and augmented supersaturation concentration from 409 to 600 mg/L. The lower the free magnesium content in the reduced mineral, the lower the magnesium dissolved concentration in the leaching liquor.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[lixiviación carbonato amoniacal]]></kwd>
<kwd lng="es"><![CDATA[lateritas]]></kwd>
<kwd lng="es"><![CDATA[incrustaciones]]></kwd>
<kwd lng="es"><![CDATA[magnesio]]></kwd>
<kwd lng="en"><![CDATA[ammonia/ammonium carbonate leaching]]></kwd>
<kwd lng="en"><![CDATA[laterite]]></kwd>
<kwd lng="en"><![CDATA[magnesium]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<label>1</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[HAIYANG]]></surname>
<given-names><![CDATA[NIU]]></given-names>
</name>
<name>
<surname><![CDATA[ARTEM]]></surname>
<given-names><![CDATA[R. OGANOV]]></given-names>
</name>
<name>
<surname><![CDATA[XING]]></surname>
<given-names><![CDATA[QIU]]></given-names>
</name>
<name>
<surname><![CDATA[CHEN]]></surname>
<given-names><![CDATA[DIANZHONG]]></given-names>
</name>
</person-group>
<source><![CDATA[Prediction of novel stable compounds in the Mg-Si-O system under exoplanet pressures]]></source>
<year></year>
<publisher-name><![CDATA[Scientific Reports]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B2">
<label>2</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[ELLIOTT]]></surname>
<given-names><![CDATA[C.A.]]></given-names>
</name>
<name>
<surname><![CDATA[FORSTER]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Thermodynamics of the Reduction Roasting of Nickeliferous Laterite Ores]]></article-title>
<source><![CDATA[Journal of Minerals and Materials Characterization and Engineering]]></source>
<year></year>
</nlm-citation>
</ref>
<ref id="B3">
<label>3</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[CHAN]]></surname>
<given-names><![CDATA[A.R.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Cómo extraer más cobalto sin afectar el níquel en la lixiviación carbonato amoniacal de menas lateríticas reducidas]]></article-title>
<source><![CDATA[Revista Minería y Geología]]></source>
<year>2000</year>
<volume>17</volume>
<numero>3-4</numero>
<issue>3-4</issue>
</nlm-citation>
</ref>
<ref id="B4">
<label>4</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[PANCORBO]]></surname>
<given-names><![CDATA[J. F.]]></given-names>
</name>
</person-group>
<source><![CDATA[Corrosión, degradación y envejecimiento de los materiales empleados en la edificación]]></source>
<year>2010</year>
<edition>1ª</edition>
<page-range>594</page-range><publisher-loc><![CDATA[Barcelona ]]></publisher-loc>
<publisher-name><![CDATA[Editor Marcombo]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B5">
<label>5</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[ZDEN&#282;K]]></surname>
<given-names><![CDATA[KO&#381;Í&#352;EK.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Crystallization in small droplets: Competition between homogeneous and heterogeneous nucleation]]></article-title>
<source><![CDATA[Journal of Crystal Growth]]></source>
<year>2019</year>
<volume>522</volume>
<numero>53-60</numero>
<issue>53-60</issue>
</nlm-citation>
</ref>
<ref id="B6">
<label>6</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[ROJAS-VARGAS]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[GARLOBO]]></surname>
<given-names><![CDATA[C.L.]]></given-names>
</name>
<name>
<surname><![CDATA[SALAZAR]]></surname>
<given-names><![CDATA[I.Y.]]></given-names>
</name>
<name>
<surname><![CDATA[TRUJILLO]]></surname>
<given-names><![CDATA[N.M.E.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Factores que inciden en la lixiviación del magnesio en soluciones carbonato-amoniacales (I).]]></article-title>
<source><![CDATA[Tecnología Química]]></source>
<year>2006</year>
<volume>26</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>70-5</page-range></nlm-citation>
</ref>
<ref id="B7">
<label>7</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[SIRISHA]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[MUKKANTI]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
<name>
<surname><![CDATA[GANDHI]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Adsorptive Removal of SO2 by Magnesium Carbonate (MgCO3)]]></article-title>
<source><![CDATA[IJGHC]]></source>
<year></year>
<volume>2</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>576-80</page-range></nlm-citation>
</ref>
<ref id="B8">
<label>8</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[ZHIPING]]></surname>
<given-names><![CDATA[ZHANG]]></given-names>
</name>
<name>
<surname><![CDATA[YAJUN]]></surname>
<given-names><![CDATA[ZHENG]]></given-names>
</name>
<name>
<surname><![CDATA[YUWEN]]></surname>
<given-names><![CDATA[NI]]></given-names>
</name>
<name>
<surname><![CDATA[ZHONGMIN]]></surname>
<given-names><![CDATA[LIU]]></given-names>
</name>
<name>
<surname><![CDATA[JIPING]]></surname>
<given-names><![CDATA[CHEN]]></given-names>
</name>
<name>
<surname><![CDATA[XINMIAO]]></surname>
<given-names><![CDATA[LIANG.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Temperature and pH Dependent Morphology and FT-IR Analysis of Magnesium Carbonate Hydrates]]></article-title>
<source><![CDATA[J. Phys. Chem. B.]]></source>
<year>2006</year>
<volume>110</volume>
<page-range>12969-73</page-range></nlm-citation>
</ref>
<ref id="B9">
<label>9</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[GUERASIMOV]]></surname>
<given-names><![CDATA[Y.A.]]></given-names>
</name>
<name>
<surname><![CDATA[DREVING]]></surname>
<given-names><![CDATA[V.]]></given-names>
</name>
<name>
<surname><![CDATA[ERIOMIN]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
</person-group>
<source><![CDATA[Curso de química - física]]></source>
<year>1971</year>
<publisher-loc><![CDATA[Moscú ]]></publisher-loc>
<publisher-name><![CDATA[Editorial MIR]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B10">
<label>10</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[HING]]></surname>
<given-names><![CDATA[R. C.]]></given-names>
</name>
<name>
<surname><![CDATA[MATOS]]></surname>
<given-names><![CDATA[R. T.]]></given-names>
</name>
</person-group>
<source><![CDATA[Aspectos fundamentales de la Química Física. T II.]]></source>
<year>1988</year>
<publisher-loc><![CDATA[Ciudad de la Habana ]]></publisher-loc>
<publisher-name><![CDATA[Editorial Pueblo y Educación]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B11">
<label>11</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[LEVENSPIEL]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
</person-group>
<source><![CDATA[Ingeniería de las reacciones químicas]]></source>
<year>1986</year>
<publisher-loc><![CDATA[Barcelona, España ]]></publisher-loc>
<publisher-name><![CDATA[Editorial Reverté, S.A.,]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B12">
<label>12</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[CHAN]]></surname>
<given-names><![CDATA[A.R.]]></given-names>
</name>
<name>
<surname><![CDATA[ROJAS-VARGAS]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[La lixiviación del proceso CARON: síntesis del conocimiento para su perfeccionamiento industrial. PARTE I.]]></article-title>
<source><![CDATA[Tecnología Química]]></source>
<year>2009</year>
<volume>29</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>98-107</page-range></nlm-citation>
</ref>
<ref id="B13">
<label>13</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[ROJAS-VARGAS]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[TAVÍO-GONZÁLEZ]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[CHAPMAN]]></surname>
<given-names><![CDATA[G. L.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Formación del magnesio libre en la reducción de lateritas e interacción con el extractable de níquel]]></article-title>
<source><![CDATA[Tecnología Química]]></source>
<year>2008</year>
<volume>28</volume>
<numero>1</numero>
<issue>1</issue>
</nlm-citation>
</ref>
</ref-list>
</back>
</article>
