Partially exchanged organophilic bentonites

dc.contributorUniversidade Federal do Rio de Janeiro (UFRJ)
dc.contributorUniversidade Estadual Paulista (Unesp)
dc.contributorUniv So Calif
dc.date.accessioned2014-05-20T15:30:18Z
dc.date.available2014-05-20T15:30:18Z
dc.date.created2014-05-20T15:30:18Z
dc.date.issued2011-09-01
dc.identifierJournal of Thermal Analysis and Calorimetry. Dordrecht: Springer, v. 105, n. 3, p. 907-913, 2011.
dc.identifier1388-6150
dc.identifierhttp://hdl.handle.net/11449/39721
dc.identifier10.1007/s10973-010-1254-2
dc.identifierWOS:000294014000020
dc.description.abstractUsing a sodium bentonite (VCNa) as substrate differently exchanged organophilic clays were obtained by reaction with hexadecyltrimethylammonium (HDTMA) chloride, at increasing reacting ratios (R) from 20 to 120 meq/100 g of clay (VC20-VC120). The sodium bentonite was previously synthesized from a Verde Claro policationic bentonite (VC) from Bravo, Paraiba State, Brazil. From the thermogravimetric (TG) and derivative thermogravimetric (DTG) analyses of these clays on calcined mass basis and from TG and DTG curves data of VCNa clay, a method was developed to estimate the mass fraction of the exchanged cation present in each organophilic clay (M (org)), as a function of R. When all sodium cations of VCNa are exchanged by HDTMA, the obtained organophilic clay presents a maximum value for M (org). From this value and TG and DTG curves data of VC and VCNa clays, the cation exchange capacity of the original VC bentonite can be estimated.
dc.languageeng
dc.publisherSpringer
dc.relationJournal of Thermal Analysis and Calorimetry
dc.relation2.209
dc.relation0,587
dc.rightsAcesso restrito
dc.sourceWeb of Science
dc.subjectOrganophilic bentonites
dc.subjectCation exchange capacity
dc.subjectCalcined mass basis
dc.subjectTG
dc.titlePartially exchanged organophilic bentonites
dc.typeArtículos de revistas


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