사문석으로부터 마그네슘의 黃酸浸出과 물유리의 製造
Sulfuric acid Leaching of Magnesium and Preparation of Glass water from Serpentine
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초록
The optimization of Mg leaching from serpentine and the utilization of leaching residue are required for practical use of CO2 sequestration by carbonation of serpentine. Magnesium was leached from serpentine with sulfuric acid and then glass water was prepared using leaching residue obtained from the leaching test. The effects of concentration of sulfuric acid, temperature and time of leaching, and pulp density on leaching of magnesium were investigated. Leaching efficiency increased to 95% under the optimum conditions; 4.0 M in sulfuric acid, 90°C in temperature, 60 minutes in leaching time, 200 g/L in pulp density. The leaching residue contained about 80% Si and is porous with 350 m2/g in surface area. The effects of NaOH concentration, temperature and time of reaction, pulp density on dissolution rate of the residue were investigated. When glass water was synthesized at room temperature, the SiO2/Na2O ratio in glass water was 3.817. Therefore, the new process in this study was found to be an attractive alternative to conventional processes operated at high temperature.
Abstract
The optimization of Mg leaching from serpentine and the utilization of leaching residue are required for practical use of CO2 sequestration by carbonation of serpentine. Magnesium was leached from serpentine with sulfuric acid and then glass water was prepared using leaching residue obtained from the leaching test. The effects of concentration of sulfuric acid, temperature and time of leaching, and pulp density on leaching of magnesium were investigated. Leaching efficiency increased to 95% under the optimum conditions; 4.0 M in sulfuric acid, 90°C in temperature, 60 minutes in leaching time, 200 g/L in pulp density. The leaching residue contained about 80% Si and is porous with 350 m2/g in surface area. The effects of NaOH concentration, temperature and time of reaction, pulp density on dissolution rate of the residue were investigated. When glass water was synthesized at room temperature, the SiO2/Na2O ratio in glass water was 3.817. Therefore, the new process in this study was found to be an attractive alternative to conventional processes operated at high temperature.
참고문헌 (16)
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