Sunflower oil bleaching by adsorption onto acid-activated bentonite
AUTOR(ES)
Foletto, E. L., Colazzo, G. C., Volzone, C., Porto, L. M.
FONTE
Brazilian Journal of Chemical Engineering
DATA DE PUBLICAÇÃO
2011-03
RESUMO
Two bentonite clays with different mineralogical compositions from Mendoza, Argentine, were activated with H2SO4 solutions of 4 and 8 N at 90ºC for 3.5 hours. This treatment affected clay structural properties, as was shown by thermogravimetry, infrared spectrometry and chemical analysis. Bleaching efficiency for sunflower oil was strongly dependent on the acid concentration used for clay activation. The samples have bleaching capacity comparable to that observed with a commercial adsorbent standard. The mineralogical composition of natural clays influenced the properties of the activated clays.
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