Indian Journal of Chemical Technology

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Preparation of High Pure Refractory Grade Magnesium Oxide from East Coast Sea Water


Affiliations
1 CSIR- Institute of Minerals and Materials Technology, Bhubaneswar-751 013, Odisha, India
 

Preparation of good quality magnesium oxide from seawater is the most challenging job because the vast majority of undesired impurities come from seawater during the precipitation stage. Hence, the double salt route has been developed as a very unique technique to prepare refractory grade magnesium oxide from seawater. Controlled addition of carrier reagent at the precipitating stage precipitates magnesium as double salt. The double salt is transformed to magnesium carbonate (MgCO3), which after calcination forms magnesium oxide (MgO). The product quality has been established by elemental analysis, PXRD, FTIR, TG/DTG, and FESEM. Commercially available MgCO3 and MgO of HiMedia have also been characterized simultaneously for comparison. The prepared magnesium oxide shows very high purity of 99.75%, which is shown from EDS measurement and PXRD and can be suitable as basic refractory material for industrial purposes.

Keywords

Sea Water, Sea Bittern, Double Salt Route, Double Salt, Magnesium Carbonate, Magnesium Oxide.
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  • Preparation of High Pure Refractory Grade Magnesium Oxide from East Coast Sea Water

Abstract Views: 24  |  PDF Views: 16

Authors

Apurba Chowdhury
CSIR- Institute of Minerals and Materials Technology, Bhubaneswar-751 013, Odisha, India
Chitta Ranjan Panda
CSIR- Institute of Minerals and Materials Technology, Bhubaneswar-751 013, Odisha, India

Abstract


Preparation of good quality magnesium oxide from seawater is the most challenging job because the vast majority of undesired impurities come from seawater during the precipitation stage. Hence, the double salt route has been developed as a very unique technique to prepare refractory grade magnesium oxide from seawater. Controlled addition of carrier reagent at the precipitating stage precipitates magnesium as double salt. The double salt is transformed to magnesium carbonate (MgCO3), which after calcination forms magnesium oxide (MgO). The product quality has been established by elemental analysis, PXRD, FTIR, TG/DTG, and FESEM. Commercially available MgCO3 and MgO of HiMedia have also been characterized simultaneously for comparison. The prepared magnesium oxide shows very high purity of 99.75%, which is shown from EDS measurement and PXRD and can be suitable as basic refractory material for industrial purposes.

Keywords


Sea Water, Sea Bittern, Double Salt Route, Double Salt, Magnesium Carbonate, Magnesium Oxide.

References