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Effects of non-ionic surfactant adding to sodium aliphatate on the three phase contact angle

Xiaojun Jiang, Xiaoyun Shu, Hongbo Xu, JianWang

The contact angles of industrial oleic acid, naphthenic acid and its accession at different temperatures adding the nonionic surfactant were investigated by determining of surface tension. It revealed that the industrial naphthenic acid could increase the contact angle of sodium oleate in silica surface and improve the mineral hydrophobicity. The optimized combination of fatty acids and nonionic surfactant enables separation temperature of silica and hematite dropped from 43 ºC to 23 ºC, the energy consumption was saved significantly.