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Abstract
Generally the metallurgical industries generate huge amounts of harmful environmental wastes, which may be solids, liquids, or gases in their nature. The present study aims to recovery sulfuric acid (227 g/l) from wastes generated during hydrometallurgical digestion of titanium ores with sulfuric acid for TiO2 production. For this purpose Alamine 336/kerosene solvent was used. Various extraction parameters as Alamine 336 concentration, shaking time, type of diluent, and O/A phase ratio were studied and optimized. Under the optimum conditions, Mc-Cabe Thiele diagram results indicated that, after four extraction stages the acid concentration in aqueous phase was reduced from the initial value of 227 g/l to about 17 g/l. Stripping of the loaded sulfuric acid from the organic phase was done with warm water (60°C). Stripping parameters as water temperature, stripping time, and A/O phase ratio were studied. Under the stripping the loaded acid concentration in organic phase was reduced from 210 to 6 g/l which matched theoretically by McCabe Thiele diagram.
GRAPHICAL ABSTRACT
