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

• Autor(a) principal: Piasson, Janaina
• Data de Publicação: 2011
• Outros Autores: Wittee, Christian, Bertella, Francine, Penha, Fábio G., Pergher, Sibele Berenice Castellã
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da UFRN
• Texto Completo: https://repositorio.ufrn.br/jspui/handle/123456789/29183
• topic: Flotation; Clay; Surfactants

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.