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

Quimica nova

Lengler, Helio C. M.¹  Pergher, Sibele B. C.²  Bertella, Francine³  Penha, Fábio G.³  Piasson, Janaina³  Wittee, Christian³ 

[1] Colorminas Colorifício e Mineração S/A, Içara, Brasil;Universidade Federal do Rio Grande do Norte, Natal, Brasil;Universidade Regional Integrada do Alto Uruguai e das Missões, Erechim, Brasil

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 employedas a catalyst, but quartz impurities can decrease the catalytic efficiency.Fine particles of clay can be purified by flotation. We examined the cationicsurfactant hexadecyltrimethylammonium bromide (HTAB), the anionic sodium dodecylsulfate (SDS) and the non-ionic TRITON X-100 for separating the quartz impuritiesfrom clay. Using X-ray diffraction, the separation was monitored for changesin the peaks corresponding to clay and quartz. Cationic surfactant HTAB wasmost effective in separating the quartz-clay mixture and the selectivity canbe explained by internal adsorption of the surfactant onto the clay and externaladsorption onto the quartz.

【 授权许可】

CC BY