EM - Escola de Minas

Notícias

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

Agora exibindo 1 - 1 de 1

Argilas bentoníticas da península de Santa Elena, Equador : pilarização, ativação ácida e seu uso como descolorante de óleo de soja.
(2009) Carrera, Ana Mercedes Morales; Varajão, Angélica Fortes Drummond Chicarino; Gonçalves, Marcos Andrade; Stachissini, Antônia Sônia
Two samples of calcic bentonite of the Santa Elena Peninsula, Ecuador, were pillared with Al13 ions in the ratio of 10, 15 and 20 meq of Al g-1 of clay, calcinated at 573, 723 and 873 °K and acid activated with 4, 6 and 8 mol L-1 H2SO4. Analyses by X-ray diffraction, X-ray fluorescence, differential and gravimetric thermal, density, surface area and porosity, were applied in order to study the modifications occurred in the crystalline structure of the montmorillonite. The 8 mol L-1 H2SO4 acid-activated 15 meq of Al g-1 of clay at 573 °K Al-pillared samples indicated the best results in the bleaching of the soybean oil measured by UV-visible spectrophotometer.