Resumen

REBELO, Monaliza Maia; CUNHA, Márcia Valéria Porto de Oliveira  y  CORREA, José Augusto Martins. Layered double hydroxides produced from blast furnace slag. Quím. Nova [online]. 2012, vol.35, n.5, pp. 883-888. ISSN 0100-4042.  http://dx.doi.org/10.1590/S0100-40422012000500004.

Hydrotalcite like compounds (HT) were prepared by co-precipitation (Mg/Al = 3.5), using an acid solution with blast furnace slag and MgCl₂.6H₂O and aqueous solutions of NaOH. The following synthesis variables were investigated: temperature (30 and 45 ºC) and pH (9 and 12). Depending of the temperature two systems were observed: Mg-Al-CO₃ (T = 30 ºC); Mg-Al-Cl-CO₃ (T = 45 ºC). An increase in the pH of synthesis and Mg²⁺ concentration produced HTs well-crystallized and with greater values of all cell parameters. The study showed the potentiality of BFS in the synthesis of well-crystallized LDHs without the presence of other crystalline phases.

Palabras llave : blast furnace slag; layered double hydroxides (LDHs); syntheses.