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Use este identificador para citar ou linkar para este item: https://repositorio.ufba.br/handle/ri/29746
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dc.contributor.authorRocha, Sarah Adriana Nascimento-
dc.contributor.authorCosta, Cibele R.-
dc.contributor.authorCelino, Joil José-
dc.contributor.authorTeixeira, Leonardo S. G.-
dc.creatorRocha, Sarah Adriana Nascimento-
dc.creatorCosta, Cibele R.-
dc.creatorCelino, Joil José-
dc.creatorTeixeira, Leonardo S. G.-
dc.date.accessioned2019-05-29T20:44:03Z-
dc.date.available2019-05-29T20:44:03Z-
dc.date.issued2013-
dc.identifier.issn1558-9293-
dc.identifier.urihttp://repositorio.ufba.br/ri/handle/ri/29746-
dc.description.abstractThe effect of different additives on the cloud point (CP) of an octylphenol ethoxylate (OPEO30) aqueous solution was investigated. The CP of OPEO30 is higher than 100 C due to its approximately 30 oxyethylene units per molecule, which limits its use in cloud point extraction (CPE) procedures at room temperature. However, the presence of additives can promote a decrease in CP, allowing its use in CPE. Halide presence decreased the CP of OPEO30 in the following order F-[Cl-[Br-. It was also observed that the addition of divalent anions resulted in a more pronounced salting-out effect than monovalent anions. Blends of OPEO30 and its counterpart with 7.5 units of ethylene oxide (OPEO7.5) were also investigated, and it was verified that the CP of OPEO30 decreased linearly with increasing OPEO7.5 concentration, showing that mixing surfactants is a strategy to be explored. In the presence of small amounts of alcohols that are partially soluble in aqueous solution, such as isobutanol and pentanol, cloudiness was observed at temperatures below the CP of pure OPEO30 solution.pt_BR
dc.language.isopt_BRpt_BR
dc.rightsAcesso Abertopt_BR
dc.sourcehttps://aocs.onlinelibrary.wiley.com/doi/full/10.1007/s11743-012-1421-5pt_BR
dc.subjectcloud pointpt_BR
dc.subjectnonionic surfactantspt_BR
dc.subjectoctylphenol ethoxylate 30EOpt_BR
dc.subjectelectrolytespt_BR
dc.titleEffect of Additives on the Cloud Point of the Octylphenol Ethoxylate (30EO) Nonionic Surfactantpt_BR
dc.title.alternativeJournal of Surfactants and Detergentspt_BR
dc.typeArtigo de Periódicopt_BR
dc.identifier.numberv. 16, p. 299-303pt_BR
dc.publisher.countryBrasilpt_BR
Aparece nas coleções:Artigo Publicado em Periódico (POSPETRO)

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