2010
DOI: 10.1590/s0370-44672010000400010
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Microflotação de caulinita utilizando aminas

Abstract: ResumoO número de estudos a respeito de fl otação de caulinita tem crescido nos últimos anos, principalmente, devido às contribuições dos pesquisadores chineses. As bauxitas chinesas apresentam alta quantidade de aluminossilicatos, entre eles caulinita, o que prejudica sua utilização no processo Bayer. Esse trabalho apresenta resultados de testes de microfl otação de caulinita com três aminas: dodecilamina (amina primária), Flotigam EDA (eteramina) e Duomeen T (amina graxa). Dodecilamina e Flotigam EDA apresen… Show more

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Cited by 3 publications
(3 citation statements)
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“…In acidic or low alkaline pH, the ionic species (RNH3 + ) predominates, while in more alkaline pH the molecular species (RNH2) becomes predominant. At pH values between 9 and 11 (which is the case of this work, i.e., pH = 10), the two species coexist, acting as collector (RNH3 + ) and frother (RNH2), respectively (Rodrigues et al, 2010). Therefore, when immersed in alkaline medium, the surface of MgO particles is coated by negative charges, increasing their adsorption capacity in the ionized amine (Monte and Peres, 2010).…”
Section: Flotation Of Calcination Productsmentioning
confidence: 95%
“…In acidic or low alkaline pH, the ionic species (RNH3 + ) predominates, while in more alkaline pH the molecular species (RNH2) becomes predominant. At pH values between 9 and 11 (which is the case of this work, i.e., pH = 10), the two species coexist, acting as collector (RNH3 + ) and frother (RNH2), respectively (Rodrigues et al, 2010). Therefore, when immersed in alkaline medium, the surface of MgO particles is coated by negative charges, increasing their adsorption capacity in the ionized amine (Monte and Peres, 2010).…”
Section: Flotation Of Calcination Productsmentioning
confidence: 95%
“…В [4] приведены результаты флотации каолинита тремя аминами: додециламин, Flotigam EDA(эфирамин), Duomeen T CH 3 -(CH 2 )x-NH 2 , где х~16.…”
unclassified
“…Результаты собирательной активности физической формы сорбции рассматриваемых реагентов коррелируют также с литературными данными [4] по их флотационной активности и согласуются с вычисленными значениями собирательной силы.…”
unclassified