2012•Journal of Central South University(Science and Technology)Requires access
Effect of sodium carbonate and sodium sulfate on structure of sodium aluminate solution
Peng Zhi-hong
Open publisher page 2 citations
Abstract
Combining with the infrared spectroscopy(IR) analysis,the effects of Na2CO3and Na2SO4 on the structure of sodium aluminate solutions were investigated.In addition,the effects of structural changes on the physicochemical properties of sodium aluminate solutions with Na2CO3and Na2SO4and precipitation process of gibbsite from sodium aluminate solutions were also investigated.The results show that the Na2CO3and Na2SO4 can change the ion structure of the aluminate solution,and the concentration of Al(OH)4 declines remarkably,while the concentration of Al2O(OH)62 increases obviously according to the FTIR analyses when the concentrations of Na2CO3 and Na2SO4 increase.Besides,the viscosity of sodium aluminate solution increases,the electric conductivity decreases and the gibbsite precipitation is inhibited with adding Na2CO3and Na2SO4.Consequently,the structural changes of aluminate solution have important influence the physicochemical properties and precipitation process of sodium aluminate solution.And elevated concentration of polymeric aluminate anions is harmful to the precipitation process of gibbsite from sodium aluminate solution.