CARACTERIZACION DE LAS REACCIONES DE PRECIPITACION DEL OXIDO DE COBALTO(III) HIDRATADO EN PRESENCIA DEL DIOXIGENO DEL AIRE.

This paper presents the reactions of precipitation of cobalt (III) oxide, substance which is employed in the nickel industry and the purification of the industrial liquors. For doing this research the air is employed as oxidant agent, regulating environmental pH with hydroxide of sodium, carbonate of sodium and the mixture of both, doing the thermodynamic analysis for determining its spontaneity in the interval of temperatures from 303 to 353 K. The values were calculated in the variation of free energy and the constants of equilibrium to the given, according to the method proposed by Criss and Cobble. In each proposed reactions are studied the behavior of pH is the course of time and it is determined the percentage of the product submission obtained. The percentage of total cobalt in form cobalt (III) are determine. Those solids were characterized by diffraction of X rays. From the studied reactions only is possible to reach the derived product in that one that is used hydroxide of sodium as basic reagent (reaction I), obtaining a percentage of submission higher than 93 %. [ABSTRACT FROM AUTHOR]