Flotation of a quartz-clay mixture with surfactants and subsequent pillaring studies

Química Nova

Bertella, Francine¹  Penha, Fábio G.¹  Piasson, Janaina¹  Universidade Federal do Rio Grande do Norte, Natal, Brasil¹  Colorminas Colorifício e Mineração S/A, Içara, Brasil¹  Wittee, Christian¹  Pergher, Sibele B. C.¹  Universidade Regional Integrada do Alto Uruguai e das Missões, Erechim, Brasil¹  Lengler, Helio C. M.¹ 

关键词: flotation;    clay;    surfactants.;   

DOI  :  10.1590/S0100-40422011000300019

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 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】

Unknown