Flotação da mistura argila-quartzo com surfactantes e estudos de pilarização

Química Nova

Janaina Piasson²  Christian Wittee²  Francine Bertella²  Fábio G. Penha²  Sibele B. C. Pergher¹  Helio C. M. Lengler¹ 

[1] ,Universidade Regional Integrada do Alto Uruguai e das Missões Departamento de Química Erechim RS ,Brasil

关键词: flotation;    clay;    surfactants;   

DOI  :  10.1590/S0100-40422011000300019

来源: SciELO

【 摘 要 】

Clay is often employed as a catalyst, but quartz impurities can decrease the catalytic efficiency. Fine particles of clay can be purified by flotation. We examined the cationic surfactant hexadecyltrimethylammonium bromide (HTAB), the anionic sodium dodecyl sulfate (SDS) and the non-ionic TRITON X-100 for separating the quartz impurities from clay. Using X-ray diffraction, the separation was monitored for changes in the peaks corresponding to clay and quartz. Cationic surfactant HTAB was most effective in separating the quartz-clay mixture and the selectivity can be explained by internal adsorption of the surfactant onto the clay and external adsorption onto the quartz.

【 授权许可】

CC BY-NC   
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