Influence of Process Parameters in Three-Stage Purification of Aluminate Solution and Aluminum Hydroxide

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dc.citation.spage1816
dc.citation.volume13
dc.contributor.authorDamjanovic, Vladimir
dc.contributor.authorFilipovic, Radislav
dc.contributor.authorObrenovic, Zoran
dc.contributor.authorPerusic, Mitar
dc.contributor.authorKostic, Dusko
dc.contributor.authorSmiljanic, Slavko
dc.contributor.authorStopic, Srecko
dc.date.accessioned2024-11-28T11:50:10Z
dc.date.available2024-11-28T11:50:10Z
dc.date.issued2023
dc.description.abstractThe influence of process parameters in the three-stage purification of aluminate solution from the Bayer process and aluminum hydroxide was considered in this paper. One of the ways of purification is treating the aluminate solution in order to reduce the concentrations in the starting raw material (solution) and then treating the aluminum hydroxide at a certain temperature and time in order to obtain an alumina precursor of adequate quality. The purification process itself is divided into three phases. The first phase involves the treatment of sodium aluminate with lime in order to primarily remove Ca2+ and (SiO3)2􀀀 impurities. Phase II aims to remove impurities of Zn2+, Fe2+, and Cu2+ by treatment with controlled precipitation using specially prepared crystallization centers. In Phase III, Na+ is removed by the process of hydrothermal washing of Al2O3 3H2O. In this work, parameters such as temperature (T), reaction time (t), and concentration of lime (c) were studied in order to remove the mentioned impurities and obtain the purest possible product that would be an adequate precursor for special types of alumina.
dc.identifier.doi10.3390/met13111816
dc.identifier.urihttps://vaseljena.ues.rs.ba/handle/123456789/1359
dc.language.isoen
dc.publisherMDPI
dc.sourceMetals
dc.subjectBayer process; sodium aluminate; alumina; hydrothermal process; aluminum hydroxide
dc.titleInfluence of Process Parameters in Three-Stage Purification of Aluminate Solution and Aluminum Hydroxide
dc.typeArticle
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