EM - Escola de Minas

URI permanente desta comunidadehttp://www.hml.repositorio.ufop.br/handle/123456789/6

Notícias

A Escola de Minas de Ouro Preto foi fundada pelo cientista Claude Henri Gorceix e inaugurada em 12 de outubro de 1876.

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20101

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Tem arquivos: SimAssunto: search.filters.subject.Ammonium quaternary salts

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    Kaolinite microflotation and zeta potential measurements in the presence of ammonium quaternary salts.
    (2010) Rodrigues, Otávia Martins Silva; Araujo, Armando Corrêa de; Peres, Antônio Eduardo Clark; Alexandrino, Júnia Soares; Lopes, Gilmara Mendonça
    Studies on kaolinite flotation are being driven by Chinese bauxite characteristics, presenting low alumina:silica weight ratios. This paper addresses the effect of the presence of cetyl pyridine chloride (CPC) and cetyl trimethyl ammonium bromide (CTAB) on kaolinite floatability and zeta potential. The reagents were dosed at three concentrations and the best floatability results were achieved at the highest concentration level (1x10-4 mol/L). Zeta potential determinations showed that both quaternary salts (CPC and CTAB) shift the kaolinite zeta potential to more positive values the specific collectors adsorption onto the mineral surface.