Influence of the acid activation of pillared smectites from Amazon (Brazil) in adsorption process with butylamine

dc.creatorGuerra, DL
dc.creatorLemos, VP
dc.creatorAiroldi, C
dc.creatorAngelica, RS
dc.date2006
dc.date37926
dc.date2014-11-16T00:37:50Z
dc.date2015-11-26T17:36:56Z
dc.date2014-11-16T00:37:50Z
dc.date2015-11-26T17:36:56Z
dc.date.accessioned2018-03-29T00:18:40Z
dc.date.available2018-03-29T00:18:40Z
dc.identifierPolyhedron. Pergamon-elsevier Science Ltd, v. 25, n. 15, n. 2880, n. 2890, 2006.
dc.identifier0277-5387
dc.identifierWOS:000241475100009
dc.identifier10.1016/j.poly.2006.04.015
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/80411
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/80411
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/80411
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1285848
dc.descriptionSmectite-bearing clay samples from Para state, Amazon region, Brazil, were used for pillaring process in the present study. The natural and pillared/activated matrices were characterized using XRD, FTIR, Al-27, Si-29 MAS NMR, TGA-DTG and textural analysis using nitrogen adsorption-desorption isotherms. The aluminum pillaring solutions (Al-13) were analyzed by Al-27 MAS NMR. The ion of intercalation (Keggin's ion) was obtained through chemical reaction of AlCl3 center dot 6H(2)O and NaOH solutions with an approximate OH/Al 2.0 molar ratio and Al(NO3)(3) and NaOH solutions with an OH/Al = 1.5. The nontronite intercalation was carried out using two methods: (1) with sodium hydroxide solution that was incorporated drop by drop in the aluminum chloride solution; and (2) using aluminum nitrate, which was maintained under vigorous stirring at 25 degrees C, during 3 h and calcined at 450 degrees C (adequate temperature for calcination) and 600 degrees C. The pillared clays were treated with HCl (0.10, 0.30 and 0.60 mol dm(-3)). The resulting materials were submitted to adsorption process with butylamine. The results showed that the pillarization process increases the basal spacing of the natural clay from 15.60 to 18.97 angstrom and the superficial area from 44 to 197 m(2) /g. The thermal stability of the natural clay was improved by the pillaring procedure. (C) 2006 Elsevier Ltd. All rights reserved.
dc.description25
dc.description15
dc.description2880
dc.description2890
dc.languageen
dc.publisherPergamon-elsevier Science Ltd
dc.publisherOxford
dc.publisherInglaterra
dc.relationPolyhedron
dc.relationPolyhedron
dc.rightsfechado
dc.rightshttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dc.sourceWeb of Science
dc.subjectpillared clay
dc.subjectAl-13
dc.subjectsmectite
dc.subjectClays
dc.subjectAl
dc.subjectMontmorillonite
dc.subjectBentonites
dc.subjectCatalysts
dc.subjectPilcs
dc.subjectOxide
dc.titleInfluence of the acid activation of pillared smectites from Amazon (Brazil) in adsorption process with butylamine
dc.typeArtículos de revistas


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