PreparaÃÃo e utilizaÃÃo de uma argila organofÃlica como adsorvente de Fenol

AUTOR(ES)
DATA DE PUBLICAÇÃO

2008

RESUMO

This research had as main objective the attainment of organophilic clay with capacity to promote the separation of phenol, found in effluent the watery ones of petrochemical industries. The experimental procedure objectifying the attainment of the organoclay was initiated by a treatment of natural clay with sodium carbonate. This treatment had as goal to intensify the thixotropic properties of the in natura smectite for the water increase in the interlayers regions of the mineralâs clay promoted by the addition of the sodium, related to the cationic exchange, in hydrating state. The final stage of the attainment of the organophilic clay corresponded to a treatment of the sodium clay, initially prepared, with commercial quaternary ammonium salt. The hydration state of the interlayer region of the sodium clay constituted a facilitate factor of the joining, in this region, of organic cation. The technique of separation of phenol, based on adsorptive processes, constituted an alternative treatment, applying itself organophilic clay transformed from a region smectite, as material adsorbents. The development of this research involved the applied adsorptive process to the operation systems in batch, relating laboratories scale. Kinetic evaluations and of equilibrium had been executed in order to get the essential parameters to the elaboration of the representative models of this adsorptive system, as the determination of the equilibrium time, maximum adsorption capacity, equilibrium adsorptive constant and kinetic adsorption constant, basic models to establish bases, in complementary future studies, for a project of a adsorption continuous in transforming the laboratorial scale for a pilot. The results of the adsorption process had indicated that the organophilic clay had an efficiency of superior removal 80% in relation to the initial phenol concentration, suggesting, therefore, the same use of as material adsorbents. The carried studies make possible the recommendation of the in natura clay treated with sodium carbonate and the sodium clay treated with ammonium quaternary salt, respectively, as thixotropic fluid of perforation of oil wells base water an base oil, second to the Norms N-2604 and N-2258 of PETROBRAS

ASSUNTO(S)

fenol organophilic clay phenol adsorption adsorÃÃo engenharia quimica argilas organofÃlicas

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